How To Become A Cisco CCNP

Congratulations on your decision to earn your CCNP certification! As a CCIE, I can tell you that Cisco certifications are both financially and personally rewarding.

To earn your CCNP, you first have to earn your CCNA certification. Then you're faced with a decision - take the three-exam CCNP path, or the four-exam path? They're both quite demanding, so let's take a look at each path.

The four-exam CCNP path includes the Building Scalable Cisco Internetworks exam (BSCI), Building Cisco Multilayer Switched Networks exam (BCMSN), Building Cisco Remote Access Networks (BCRAN), and Cisco Internetwork Troubleshooting (CIT) exam.

The three-exam path combines the BSCI and BCMSN exams into a single exam, called the Composite exam.

I'm often asked what order I recommend taking the exams in. After earning your CCNA, I recommend you begin studying for the BSCI exam immediately. You will find the fundamentals you learned in your CCNA studies will help you a great deal with this exam. You're going to add to your CCNA knowledgebase quite a bit when it comes to OSPF and EIGRP, as well as being introduced to BGP.

I don't have a preference between the BCMSN and BCRAN exams, but I do recommend you take the CIT exam last. You'll be using all the skills you learned in the first three exams to pass the CIT. It's a very demanding exam, and it's a little hard to troubleshoot technologies that you haven't learned yet!

The CCNP is both financially and personally fulfilling. Once you complete your CCNA studies, take a little breather and then get started on your CCNP studies. The more you know, the more valuable you are in today's ever-changing IT job market.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNA exam with The Bryant Advantage!

How to pass CCNA: 6 Steps to Success

CCNA is one of the most respected Associate level Certification in the world today.
Getting a CCNA will definitely help you to get a better job or at least get your foot into Professional Networking Field. When you meet a person that has CCNA degree you will notice that he or she knows something about Networking.
This article will describe and give you some tips on how to achieve CCNA.
I did it so can you, so lets get started.


• 1. Getting ready mentally:
  First thing you need to do is mentally prepare your self. What I mean by that is that you have to seriously think about on why are you getting CCNA and why do you want to be CCNA certified. You have to firmly decide and believe that you will get CCNA within next 3-6 months or so.
  Try to budget your study time well. If you a very social person (like me) you will have to give up some of your social time for the next couple of months.
  Your friends and family will understand. Trust me: it is well worth it. Once you get that cert you can make up for the lost social time.
  
  

• 2. Getting the right study material:
  Second thing you need to do is to get proper study material.
  There is lot of controversy around this and some people go overboard with study guides, books, simulators and such.
  I believe that two Cisco Press books INTR and ICND by Wendell Odom are enough as far as the books go. They are really well written and easy to follow. So sign up at http://www.ciscopress.com and get those two books. Make sure you got the latest version.
  You will also want to get some kind of a simulator that will let you practice commands and that will also build up your confidence.
  You can buy real equipment but that could get expensive. I highly recommend that you become member of Cisco Certification forum.
  Forum is huge and you will get lot of helpful answers, tips and advices pretty quick. (I know I did)
  
  

• 3. Approach and diving deep:
  There are many different approaches to studying from books but I will tell you about mine. This step will take the most of your studying time.
  -Before you even start reading any of the books I suggest learning binary math (really easy) and subnetting so you can do it in your sleep.
  http//www.learntosubnet.com is excellent resource. -read both books casually once from front to cover (make sure you cover introduction and practice questions too). This will give you good overview.
  -Install both CDรขโ�ฌโ�ขs that came with books and practices some of the questions. Donรขโ�ฌโ�ขt worry if you get lot of them wrong.
  -Now, you will ready both books again but this time you will have to read it to truly understand the concept and how things work. Master one chapter and do questions from just that chapter until you sick of it. Then move to the next chapter.
  -Once you mastered all chapters do lot of questions and labexercises. Those two CDรขโ�ฌโ�ขs will give you ability to do that.
  
  

  4. Schedule the test:
  Youรขโ�ฌโ�ขre not done yet with studying but it is really good to schedule the test after you completed step 3 in this article. Here is why:
  If you schedule the test a month in advance right after you completed step 3, you wonรขโ�ฌโ�ขt be able to slack and make excuses not to study hard until tests and it is also good to give your self a headline. I have seen people working on their CCNA for 2 years. They master one or two chapters, then they rest for 2 two months and right when they think they are ready for the next chapter, they forget what they have learned in the first chapter.
  
  

  5. Read both books one more time to refresh.
  This is optional, but I highly recommend reading the both books one more time. If you read both books in a three week that will give you one more week before the test to cram which is subject of the next step.
  So by now you shouldรขโ�ฌโ�ขve read both books three times over. I also suggest re-reading questions and answers from both books one more time.
  
  

  6. Cram, Cram and Cram -This is the last part of your study and there is no turning back. Deadline is hanging around your neck like a noose. You should cram Q&A for no more then 10 days before you take the test.
  At this point it is really important that you get fresh and different questions then those included with your CDรขโ�ฌโ�ขs. Some people claims that brain dumps or Q&A are bad and evil. I tend to disagree with that. At this point you already firmly grasped the whole CCNA concept and Q&A will only help you. So get some Q&A exam question and cram, cram and cram them for a week.
  Donรขโ�ฌโ�ขt use books or CDรขโ�ฌโ�ขs anymore. There is no looking back. No worries, material from the books will return to you at the right time.
  -Donรขโ�ฌโ�ขt do any studying a night or a day before the test. Go out with your wife or significant other to a dinner and a movie. Relax. It is very important to relax and get a good night sleep since one of those testing boots could really be intimidating. If you did all the steps above and read books with intention to understand the topics and how stuff works (no pun intended), and not just to pass the test you should be more then ready by now.
  
  

  We came to an end of this short tutorial. I hope this article give you at least some ideas on how to approach studying for CCNA.
  If you fail CCNA first time, donรขโ�ฌโ�ขt get discouraged. You will have more knowledge and confidence when you attempt it the next time then the person who passed it on the first try. Whatever approach you take I wish you good luck and prosper career.
  
  

Vanja Buric is Network Engineer, and works for Charter Communication Business Engineering Department,
and also owner of the http://www.vanjaburic.com website, where you can get latest networking news, articles,tips, free e-Books, virus alerts and lot moreรขโ�ฌยฆ as well as purchase IT Exam study guides.

CCNP / BSCI Exam Tutorial: Route Summarization And The OSPF Null Interface

CCNP exam success, particularly on the BSCI exam, demands you understand the details of route summarization. This skill not only requires that you have a comfort level with binary conversions, but you have to know how and where to apply route summarization with each individual protocol.

You also have to know the "side effects" of route summarization. With OSPF, there will actually be an extra interface created at the point of summarization, and this catches a lot of CCNP candidates by surprise. Let's take a look at the null0 interface and how it relates to OSPF summarization.

On R1, the following networks are redistributed into OSPF, and then summarized.

interface Loopback16

ip address 16.16.16.16 255.0.0.0

interface Loopback17

ip address 17.17.17.17 255.0.0.0

interface Loopback18

ip address 18.18.18.18 255.0.0.0

interface Loopback19

ip address 19.19.19.19 255.0.0.0

R1(config)#router ospf 1

R1(config-router)#redistribute connected subnets

R1(config-router)#summary-address 16.0.0.0 252.0.0.0

The summary address appears on R2, a downstream router.

R2#show ip route ospf

O E2 16.0.0.0/6 [110/20] via 172.12.123.1, 00:00:05, Serial0

Let's go back to R1 and look at its OSPF table.

R1#show ip route ospf

O 16.0.0.0/6 is a summary, 00:01:51, Null0

Where did the null0 interface come from, and why is it there? Packets sent to the null interface are dropped, and in this case, that's a good thing.

When you configure summary routes in OSPF, a route to null0 will be installed into the OSPF routing table. This helps to prevent routing loops. Any packets destined for the routes that have been summarized will have a longer match in the routing table, as shown below...

C 17.0.0.0/8 is directly connected, Loopback17

C 16.0.0.0/8 is directly connected, Loopback16

C 19.0.0.0/8 is directly connected, Loopback19

C 18.0.0.0/8 is directly connected, Loopback18

O 16.0.0.0/6 is a summary, 00:01:51, Null0

.. and packets that do not match one of the summarized routes but do match the summary route will be dropped.

Preventing routing loops when performing route redistribution and summarization is vital. OSPF gives us a little help in that regard in this situation, and as you study more complex redistribution scenarios on your way to the CCNP and CCIE, you'll realize that we'll take all the help we can get!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Get your CCNP certification with The Bryant Advantage!

An Overview of CompTIA Certification Programs

High-tech is often associated with computers or information technology (IT). IT has transformed the way we live and the way we conduct businesses. A well-established certification program is often the indication of maturity of an industry or profession. The programs utilize standard tests to exam the knowledge and level of expertise of the professionals . CompTIA certifications are one of such certification programs for the information technology industry. CompTIA certifications are provided by The Computing Technology Industry Association (CompTIA) - a non-profit trade association founded in 1982. Many of ComPTIA certification exams are computer-based and are composed of multiple choice questions.

A+

The A+ certification demonstrates the knowledge and understanding of computer hardware and operating systems. It is primarily designed for qualification of a computer technician though many organization utilize the A+ certification training to help their employee to acquire the basic knowledge of computer hardware and operating systems.

The actual certification includes the A+ Hardware Exam and the A+ Operating System Technologies Exam, which focuses exclusively on Microsoft operating systems. The A+ exam is designed for IT professionals who have about a year of hands-on experience.

Network+

Network+ certification is designed for network technicians to test and demonstrates skill and understanding of network hardware, installation, and troubleshooting in general. Network+ certification is not vendor specific. Besides Network+ certification, network technicians further acquire vendor specific certification, such as to Microsoft certifications and Cisco certifications.

Server+

CompTIA Server+ certification demonstrate the competency of server-specific hardware and operating systems skills. A+/Server+ certification focus on the general knowledge of various servers while the Microsoft Certified Systems Administrator (MCSA) certification, of course, test the knowledge of Microsoft products - NT server, SQLServer or Information server for web publishing.

Security+

Security+ certification focus on security aspect of information technology, such computer security and network security.

Linux+

As the Open Source operation system gains the popularity and wide acceptance, CompTIA offers Linux+ certification. Unlike other CompTIA certifications which focus on general understanding of the subject, not on any vendor-specific products. Linux+ is product-specific, but not vendor-specific because the nature of open source software. The certification exam covers the installation, management, configuration, security, documentation, and hardware of Lunix.

The most-known ComPTIA certification is A+ certification for computer hardware and operating system. Many organizations simply utilize A+ training for general computer training. Other even less-known certifications from ComPTIA are HTI+ (Home Technology Integrator covers installation, integration and troubleshooting of automated home sub-systems; e-Biz+ certification covering basic knowledge of e-commerce, CTT+ certification for training professionals, and CDIA+ certification for document management and enterprise content management.

Natalie Aranda writes on computers and information technology. The most-known ComPTIA certification is A+ certification training for computer hardware and operating system. Many organizations simply utilize A+ training for general computer training. A+ certification and other CompTIA certifications are provided by The Computing Technology Industry Association (CompTIA) - a non-profit trade association founded in 1982. Many of ComPTIA certification exams are computer-based and are composed of multiple choice questions.

Why Computer Certifications Really Don't Matter

I am currently a Network Administrator that supports about 100 Servers and 2000 Clients that has 8 years experience in Network Engineering. This article explains why certifications really dont matter.When I was in school all that my classmates talked about was how you need this certification and that certification. Now that I am responsible for interviewing technicians I learned that they really dont matter.

How many times did your Interviewer ask you to see your actual certification. NEVER or almost NEVER. As long as you know the material you can say you have any certification you want. Since 95% of employers will never really check does it make it right to lie about what certifications you really have. I would have to say YES and NO. It is not right to lie about what certifications you really have but on the other hand most companies have a non technical person interview you so all he wants to hear is what are you CERTIFIED in.

My suggestion would be to just know the information that the job is for and now about saying you have all the certs. I still personally go and get all the certifications but that is because I am required to show proof at my current position.

Thanks,

arsbargains

Check out our website WWW.ARSBARGAINS.COM

An Overview of A+ Certification

The IT industry is one of the few that requires A+ training to demonstrate computer-training skills acquired outside the frame of a normal job experience. This requisite is achieved by passing industry standard A+ certification tests, the most basic qualification that any IT professional should earn.

A+ training is the proof that you have received the adequate knowledge in computer systems and A+ certification confirms that you have computer training and you are capable to do common tasks, such as assemble a computer, install different operating systems and applications, and troubleshooting when needed.

Both A+ training and A+ certification do not require a determined scholarship to apply or a qualified job in the IT industry, only the willingness to get the knowledge to later qualify as a technician in the field, regardless of your background. This approach is also considered getting certification from Cisco, Novell, Oracle or Microsoft, although some prerequisites may apply depending on the chosen certification.

If you are considering computer training, take in mind that several companies require A+ Certification when hiring new personal, and many of them will consider that you stand out from the competition having a former A+ training. However, you do not need to become an IT technician to apply for these certifications.

Anyone who is enrolled in computer training may benefit from the knowledge acquired with A+ training or getting an A+ certification even just for personal use or to aid an developer. As an example, if you are a programmer who needs to wait long hours for a technician every time your computer does not respond, the you are not as productive as someone with the knowledge of "do-it-by-yourself" that appropriates training knowledge.

Some people believe that A+ training and A+ certifications are useless certifications in the middle of a universe where many other certifications rule. Most of those detractors believe they do not need a certification because they already have a job. If you are smart enough, you can undergo computer training to increase your potentiality in the job market, in a business or to change careers.

A+ training and A+ certification offer the opportunity to people who do not meet the prerequisites of other certifications. People too young or those who have a limited budget or limited time to attend a college may benefit of A+ certifications. Whether you need a full-time or part-time job, or just get some computer training, this opportunity is for you and the certification is available either through land-based or online courses.

Natalie Aranda writes about computer training and IT certifications. If you are considering computer training, take in mind that several companies require A+ Certification when hiring new personal, and many of them will consider that you stand out from the competition having a former A+ training. However, you do not need to become an IT technician to apply for these certifications.

CCNA Certification Exam Tutorial: Cisco Switching Modes

To pass the CCNA exam and earn this important certification, youรขโ�ฌโ�ขve got to know switching inside and out. While youรขโ�ฌโ�ขre learning all the basic switching theory, make sure to spend some time with the one of three switching modes Cisco routers can use.

Store-and-Forward is exactly what it sounds like. The entire frame will be stored before it is forwarded. This mode allows for the greatest amount of error checking, since a CRC (Cyclical Redundancy Check) is run against the frame before it is forwarded. If the frame contains an error, it is discarded. If thereรขโ�ฌโ�ขs no problem with the frame, the frame is then forwarded to its proper destination.

While store-and-forward does perform error checking, the delay in processing the frame while this error check is run results in higher latency than the other modes youรขโ�ฌโ�ขre about to read about. The latency time can also vary, since not all frames are the same size.

Cut-through switching copies only the destination MAC address into its memory before beginning to forward the frame. Since the frame is being forwarded as soon as the destination MAC is read, there is less latency than store-and-forward. The drawback is that there is no error checking.

There is a middle ground, fragment-free switching. Only part of the frame is copied to memory before it is forwarded, but itรขโ�ฌโ�ขs the first 64 bytes of the frame, not just the destination MAC. (Why? Because if there is a problem with the frame, itรขโ�ฌโ�ขs most likely in the first 64 bytes.) There is a little more error checking than cut-through, but not as much latency as with store-and-forward.

Note that the latency of both cut-through and fragment-free is fixed; these modes always look at the first six or 64 bytes, respectively. Store-and-forward's latency depends on the size of the frame.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Get your CCNA study guide from The Bryant Advantage!

Cisco CCNP / BSCI Tutorial: The Role Of The OSPF ASBR

To pass the BSCI exam and earn your CCNP certification, you've got to master the (many) details of OSPF. You might have thought there were quite a few OSPF details in your CCNA studies, but you'll now build on that foundation on the way to earning your CCNP.

One such detail is the role of the Autonomous System Border Router (ASBR) in OSPF. The name itself raises some eyebrows, since you learned in your CCNA studies that OSPF doesn't use autonomous systems! Just as an OSPF Area Border Router borders multiple OSPF areas, the ASBR borders the entire OSPF domain and another source of routes. This can be another dynamic routing protocol, or directly connected networks that are not being advertised into OSPF by the network command.

Let's say we have a router running both OSPF and RIP version 2. By default, the RIP process will not contain any OSPF-discovered routes, and vice versa. The two separate routing processes are just that - separate. If we want the other OSPF routers to know about the RIP routes, route redistribution must be configured. When the RIP routes are redistributed into OSPF, that router is then an ASBR.

In the below example, RIP subnets have been redistributed into OSPF. A seed metric is not necessary when redistributing routes into OSPF. The command "show ip ospf" confirms that this router is now an ASBR.

R1(config)#router ospf 1

R1(config-router)#redistribute rip subnets

R1#show ip ospf

Routing Process "ospf 1" with ID 1.1.1.1

Supports only single TOS(TOS0) routes

Supports opaque LSA

It is an autonomous system boundary router

The ASBR can also perform route summarization on the routes being injected into OSPF with the summary-address command. (To configure OSPF inter-area summarization, use the area range command.) By mastering route summarization and route redistribution, you're well on your way to passing the BSCI exam and earning your CCNP certification!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

Computer Training School Tutorial: Know Your Instructor

Making the decision to attend a computer tech school can be one of the best decisions of your life. Another great decision is to tap a hidden wealth of knowledge that is right before every student at schools such as ECPI and ITT, but very few students take advantage of it.

When you're attending a computer training school, you must avoid the mentality that some other students will have - "I gotta go to school, I gotta be here, I can't wait to leave and go home". When you're preparing for a career working with computers, you've got to take advantage of every learning experience you can get, and that includes getting to know the most valuable resource at your school - your teachers!

Your teachers have busy schedules, but it was my experience that every single time I asked for help or had questions outside of class, my teachers went the extra mile to help me. Iรขโ�ฌโ�ขm sure yours will do the same for you, but you have to let them know you want that help!

At your tech school, you must develop the skills and work ethic that you will use to succeed in the IT field. By staying after class, working overtime in the computer labs, and getting to know your instructors, you'll be astonished at the additional knowledge you can pick up. Almost any good teacher is going to have real-world experience, and you need to draw on that knowledge. Having lunch with an instructor is another great idea, as it allows you to get to know them away from the classroom.

Part of success in any field is making contacts for the future. You may not be in the IT field yet, but you should already be getting to know people with IT experience - and who better than your teachers? Besides, they hear about job openings all the time from friends, and the more you stand out from the crowd, the more likely you are to be remembered for such opportunities!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Get your CCNA study guide with The Bryant Advantage!

Cisco CCNA Certification: The (Many) Different Kinds Of Switching

When you're studying for your CCNA exam, whether you're taking the Intro-ICND path or the single-exam path, you're quickly introduced to the fact that switching occurs at Layer 2 of the OSI model. No problem there, but then other terms involving switching are thrown in, and some of them can be more than a little confusing. What is "cell switching"? What is "circuit switching"? Most confusing of all, how can you have "packet switching"? Packets are found at Layer 3, but switching occurs at Layer 2. How can packets be switched?

Relax! As you'll see in this article, the terms aren't that hard to keep straight. Packet switching, for example, describes a protocol that divides a message into packets before they're sent. The packets are then sent individually, and may take different paths to the same destination. Once the packets arrive at the final destination, they are reassembled.

Frame switching follows the same process, but at a different layer of the OSI model. When the protocol runs at Layer 2 rather than Layer 3, the process is referred to as frame switching.

Cell switching also does much the same thing, but as the name implies, the device in use is a cell switch. Cell-switched packets are fixed in length. ATM is a popular cell-switching technology.

The process of circuit switching is just a bit different, in that the process of setting up the circuit itself is part of the process. The channel is set up between two parties, data is transmitted, and the channel is then torn down. The circuit-switching technology most familiar to CCNA candidates is ISDN.

Don't let these terms confuse you. The four different terms are describing much the same process. The main difference is that they are occurring at different levels of the OSI model, and using a different transport method to get the data where it needs to go.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNA exam with The Bryant Advantage!

How to Choose a Computer Training School

Since the birth of the internet, the computer industry has been filled with potential jobs. It not only has become one of the leading industries in the world, but it has provided many students with the opportunity to do what they love best.

Although computer jobs are popular, they are anything but easy. In order to get a great job in the computer field, one must have a lot of experience, CBT, and education. Luckily, there are dozens of different ways to get a degree. However, with so many different routes to take, it can be difficult to choose a computer training school. As long as you have the tools to pick your career path, it should be smooth sailing.

The first thing you need to ask yourself is what kind of computer field you want to go into. With hundreds of different careers in the industry, it is crucial to narrow it down to a few options. There are programs that include web design to basic programming. Nonetheless, you need these tools to make your mark in the world. However, it may be smart to find out what careers are "hot" in the market. Some positions are quite hard to find, while others make millions of dollars a year. If you want to make money, it is important to find the jobs that will get you there.

After you decide what type of career you would like in the computer industry, it is smart to research the training schools around your area. You can do so by searching the term on Google or going to specific sites. Many people prefer http://www.computer-schools.us/, where they can type in their area and see the opportunities available. Surprisingly, many students are actual professionals already in another industry, who are looking to expand their skills. Training centers can be found either online or offline, depending on the amount of time you want to spend training. If you want to get your computer training done quickly, it is recommended that you devote most of your time training and perhaps finding an internship in the process.

For those who want prominent training but donรขโ�ฌโ�ขt know where to look, then New Horizons learning center may be the place to go. New Horizons is one of the largest IT training companies in the world. With great flexibility and convenience, students are able to get their certification quickly on their own time. It is great because New Horizons offers three types of programs. While there are in person training sessions with a traditional teacher, there are also online courses. This web training is the newest trend, as e-learning has become one of the biggest education markets in the past decade.

If you are unsure about this specific program, there are many other great CBT programs such as Global Knowledge. Global knowledge offers hundreds of programs for professionals and newcomers alike. This company has trained fortune 500 companies, as well as businesses worldwide.

Overall, there are hundreds of different options when choosing the right computer training program. With the internet now expanding to e-learning, CBT has become fairly easy and convenient. You can easily get certified if you devote just a few hours a week to the program. No matter what you decide to do, it is important that you have the drive and the passion. After researching the program you want to take, and figuring out the type of career you want, it is essential to work hard and study the long hours. With such an extensive career, it is vital that you know all of the information taught to you. This is anything but an "easy" get through it program, where you can sleep the entire time. If you put in the effort and the hours, you will surely come out on top.

Natalie Aranda writes on training and technology. For those who want prominent training but donรขโ�ฌโ�ขt know where to look, then New Horizons learning center may be the place to go. New Horizons is one of the largest IT training companies in the world. With great flexibility and convenience, students are able to get their certification quickly on their own time. It is great because New Horizons offers three types of programs. With the internet now expanding to e-learning, computer training and CBT has become fairly easy and convenient.

Cisco CCNP Certification: The BGP Weight Attribute

When you're studying for the CCNP certification, especially the BSCI exam, you must gain a solid understanding of BGP. BGP isn't just one of the biggest topics on the BSCI exam, it's one of the largest. BGP has a great many details that must be mastered for BSCI success, and those of you with one eye on the CCIE must learn the fundamentals of BGP now in order to build on those fundamentals at a later time.

Path attributes are a unique feature of BGP. With interior gateway protocols such as OSPF and EIGRP, administrative distance is used as a tiebreaker when two routes to the same destination had different next-hop IP addresses but the same prefix length. BGP uses path attributes to make this choice.

The first attribute considered by BGP is weight. Weight is a Cisco-proprietary BGP attribute, so if you're working in a multivendor environment you should work with another attribute to influence path selection.

The weight attribute is significant only to the router on which it is changed. If you set a higher weight for a particular route in order to give it preference (a higher weight is preferred over a lower one), that weight is not advertised to other routers.

BGP uses categories such as "transitive", "non-transitive", "mandatory", and "optional" to classify attributes. Since weight is a locally significant Cisco-proprietary attribute, it does not all into any of these categories.

The weight can be changed on a single route via a route-map, or it can be set for a different weight for all routes received from a given neighbor. To change the weight for all incoming routes, use the "weight" option with the neighbor command after forming the BGP peer relationships.

R2(config)#router bgp 100

R2(config-router)#neighbor 100.1.1.1 remote-as 10

R2(config-router)#neighbor 100.1.1.1 weight 200

Learning all of the BGP attributes, as well as when to use them, can seem an overwhelming task when you first start studying for your BSCI and CCNP exams. Break this task down into small parts, learn one attribute at a time, and soon you'll have the BGP attributes mastered.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

Cisco CCNA Certification Exam Tutorial: The OSI Model's Physical Layer

To pass your CCNA exam and earn this coveted certification, you've got to master the seven layers of the OSI model and what each layer does. For those of you taking the two-exam path, you can expect quite a few OSI model questions on the Intro exam. In this seven-part series, we'll spend some time taking a look at each of the OSI model layers, starting with the Physical layer.

Often, CCNA candidates ask if the OSI model has any practical uses for network administrators. I used to wonder the same thing, and I can now tell you that the answer is definitely yes!

The OSI model isn't something you want to memorize and then forget about, as using the OSI model gives you a structured approach for troubleshooting. Whenever a network device isn't working properly, I always say to "start at the physical layer". The Physical layer is Layer One of the OSI model, and this is where troubleshooting should always start. Is the device on? Is it properly connected? If everything is fine at Layer One, you just move up to Layer Two, and continue in this structured fashion until the problem is identified.

The Physical layer is the layer at which bits are transmitted over the physical media. There is no routing or switching going on at this layer. The data has been broken down into more manageable pieces until the data takes the form of ones and zeroes at the Physical layer.

Even though there's no routing or switching at the Physical layer, CCNA candidates should be familiar with a couple of network devices that work at Layer One. A repeater is a device that regenerates an electrical signal, allowing the signal to travel longer distances without fading. (The process of an electrical signal gradually fading in strength over distance is "attenuation".) A hub is basically a multiport repeater, and both of these devices are considered Physical layer devices. Ethernet and Token Ring both operate at the Physical layer as well.

Learning the OSI model's Physical layer isn't just important in your CCNA exam studies, it's the first step in any network troubleshooting. After all, your network's end users are going to have a tough time sending print jobs to a printer that's turned off!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage , home of free CCNA and CCNP tutorials! Pass the CCNA exam with Chris Bryant!

Cisco CCNP Certification / BSCI Exam Tutorial: An Introduction To BGP

When you're studying for the BSCI exam on the way to earning your CCNP certification, it's safe to say that BGP is like nothing youรขโ�ฌโ�ขve studied to this point. BGP is an external routing protocol used primarily by Internet Service Providers (ISPs). Unless you work for an ISP today or in the future, you may have little or no prior exposure to BGP. Understanding BGP is a great addition to your skill set รขโ�ฌโ�� and you have to know the basics well to pass the BSCI exam.

Note that I said "the basics". BGP is a very complex protocol, and when you pursue your CCIE, youรขโ�ฌโ�ขll see what Iรขโ�ฌโ�ขm talking about. As with all things Cisco, though, when broken down into smaller pieces, BGP becomes quite understandable. You will need to know the basics of BGP as presented in this chapter to pass your BSCI exam รขโ�ฌโ�� so letรขโ�ฌโ�ขs get started.

BGP defined:

An Internet protocol that enables groups of routers (called autonomous systems) to share routing information so that efficient, loop-free routes can be established. BGP is commonly used within and between Internet Service Providers (ISPs).

There are a couple of terms in there that apply to the protocols youรขโ�ฌโ�ขve mastered so far in your studies. The term "autonomous system" applies to IGRP and EIGRP as well as BGP; youรขโ�ฌโ�ขll be indicating a BGP AS in your configurations just as you did with IGRP and EIGRP. And weรขโ�ฌโ�ขre always looking for efficient, loop-free routes, right? As it did with IGRP and EIGRP, "autonomous system" simply refers to a group of routers that is managed by a single administrative body. An autonomous system will use an Interior Gateway Protocol (IGP) such as OSPF or EIGRP to route packets inside the AS; outside the AS, an Exterior Gateway Protocol (EGP) such as BGP will be used.

BGP shares some characteristics with some routing protocols youรขโ�ฌโ�ขve already studied. BGP supports VLSM, summarization, and CIDR. Like EIGRP, BGP will send full updates when two routers initially become neighbors and will send only partial updates after that. BGP does create and maintain neighbor relationships before exchanging routes, and keepalives are sent to keep this relationship alive.

BGP has some major differences from the IGPs weรขโ�ฌโ�ขve studied to this point. Youรขโ�ฌโ�ขll hear BGP referred to as a path-vector protocol. As opposed to distance-vector protocols that exchange relatively simple information about available routes, BGP routers will exchange extensive information about networks to allow the routers to make more intelligent routing decisions. This additional BGP path information comes in the form of attributes, and these path attributes are contained in the updates sent by BGP routers. Attributes themselves are broken up into two classes, well-known and optional.

BGP also keeps a routing table separate from the IP routing table.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

Cisco / Microsoft Computer Certification: Be Ready For Your Opportunity

I was reading The Big Moo: Stop Trying To Be Perfect and Start Being Remarkable this morning, and Iรขโ�ฌโ�ขd recommend a copy of this to anyone who wants to improve their career and their future. And thatรขโ�ฌโ�ขs all of us, right?

There was one particular line that really stood out to me: Betting on change is always the safest bet available. That describes life perfectly, but it also describes a career in Information Technology perfectly as well. There is no field in the world that has the constant and never-ending changes that IT does. And every single one of us can look at this as a massive opportunity for personal and professional growth.

Is that how youรขโ�ฌโ�ขre looking at it? I remember when I passed my first certification exam, the Novell CAN, back in 1997. Man, I thought I knew it all then. J But I quickly learned that youรขโ�ฌโ�ขve got to keep learning in IT. I also learned that if youรขโ�ฌโ�ขre willing to put in the work and make the sacrifices, thereรขโ�ฌโ�ขs no other field with the limitless potential for growth and excellence.

Like everyone else, my career has had its ups and downs, but I always kept learning and growing. Today, Iรขโ�ฌโ�ขve got my dream job, working with students and customers just like you รขโ�ฌโ�� to help you create your own future.

The next 18 months are filled with endless possibilities, particularly with the rapid growth of VoIP and Microsoft Vista on the horizon. There will be those who rationalize their inertia, saying "Iรขโ�ฌโ�ขll never have to support those, so I donรขโ�ฌโ�ขt need to learn them."

There will also be those who see VoIP and Vista as enormous opportunities to learn and advance in their careers and their lives. These people will get started today, learning the fundamentals of Cisco and advancing their networking knowledge in order to be ready for opportunities as they come along.

You canรขโ�ฌโ�ขt start studying and learning when the opportunity arrives รขโ�ฌโ�� youรขโ�ฌโ�ขve got to be ready when opportunity knocks. If youรขโ�ฌโ�ขve been putting off studying for a Cisco or other computer certification รขโ�ฌโ�� and I know the summer is a really good time for putting off studying รขโ�ฌโ�� get back on track today.

Because you never know what opportunities are going to come along รขโ�ฌโ�� but you do know that when they do, youรขโ�ฌโ�ขve got to be ready to take advantage. After all, opportunity really does knock only once!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! And coming in 2007 -- Microsoft Vista certification from The Bryant Advantage!

The Future Of Computer Certification Exams

The format and difficulty of computer certification exams is constantly changing. When I took my first certification exam (Novell NetWare 3.1x CNA, January 1997), there was no such thing as a simulator question, and my practical skills really were not tested. The exams then were much heavier on memorization.

One factor that helped make up for that was that the Novell exams were adaptive. If you missed a question on a particular topic, you would continue to be asked questions about that topic until you got it right. You couldn't afford to be weak in any topic, because the exam would most likely find that out and keep hitting you with questions on that topic until you failed.

Adding to the stress, after a certain number of questions your exam could end at any time. You had no idea how many questions you would get, just that you would get at least 15. Every time you hit the "next" button after question 15, you didn't know if you'd get another question or if the exam would suddenly end and give you a pass or fail response.

Times have changed. Cisco has led the way in introducing simulator questions to their exams, where the candidate is presented with a simulation of a router or network and asked to perform tasks that someone who is ready to earn that certification should be able to perform. This is a much better test of competency than the exams were eight years ago.

What will be the next "big jump" in computer certification exams? To earn the world's most difficult technical certification, the CCIE, the candidate must first pass a rigorous 100-question qualification exam, and must then pass a practical lab exam. The candidate is presented with an exacting set of network requirements and must build that network on a pod of Cisco routers and switches in less than eight hours.

This is just personal opinion and not "insider information", but I believe the day will come when the CCNA, CCNP, and other Cisco certifications will require some kind of hands-on practical lab to earn the certification. What better way to test competency than to have to perform tasks on real Cisco equipment? There would be more overhead for Cisco with this kind of testing, since lab equipment and lab proctors would be needed, but the already-prized CCNA and CCNP would become that much more valuable in the workplace if employers knew that to earn that certification, the job candidate had to pass a hands-on exam.

This would benefit the candidates as well, since it would do an even better job in protecting their investment in time and money. This could also be the next step in ferretting out candidates who try to get past the CCNA and CCNP exams via braindumps. As I always tell my students and customers, when you're standing in front of that router or switch, there is no multiple choice ... you either know it or you don't!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNA exam with The Bryant Advantage!

Cisco Certification: Introduction To ISDN, Part V

The major reason I recommend getting your hands on real Cisco equipment rather than a simulator is that real Cisco routers give you the chance to practice and learn show and debug commands.

The knowledge you acquire from debugs is invaluable. Frankly, it's this knowledge that puts you above the 'averageร�ยขรขโ��ยฌร�ย� CCNA who doesn't have that hands-on experience. Watching debugs in action also gives you a head start on the CCNP. Since 90 - 95% of CCNAs go on to pursue the CCNP, it's a great idea to get started with debugs now.

Don't make the mistake of waiting until you're studying for your CCNP and CCIE to start learning debugs and shows. The work you do for the CCNA is the foundation for everything you'll do in the future.

Never, ever, ever practice debugs on a production network. There are debugs that will give you so much information that the router actually becomes overloaded and then locks up. Never practice debugs on a production network.

It's important to know the proper show and debug commands for ISDN for several reasons. First, by watching ISDN in operation, you can see its processes and better understand what's going on. Secondly, it's difficult if not impossible to properly troubleshoot ISDN without knowing the proper show and debug commands. (It's easy to overlook an ISDN authentication error just by looking at the configuration, but running debug ppp negotiation will quickly show you where the problem lies.)

Let's take a look at the ISDN show and debug commands that every CCNA and CCNP should know.

Show ISDN Status

If you only know one ISDN show command, it's got to be this one. Always use this command after configuring your ISDN switch type and any necessary SPIDs. The command will show you the switch type (and will also show you if you did not configure a switch type), and whether the SPIDs you entered are valid:

R1#show isdn status

Global ISDN Switchtype = basic-ni < ISDN switch type is correctly configured.> ISDN BRI0 interface

dsl 0, interface ISDN Switchtype = basic-ni

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 91, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

TEI = 92, Ces = 2, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

Spid Status:

TEI 91, ces = 1, state = 5(init)

spid1 configured, no LDN, spid1 sent, spid1 valid < SPID 1 is good.>

Endpoint ID Info: epsf = 0, usid = 1, tid = 1

TEI 92, ces = 2, state = 5(init)

spid2 configured, no LDN, spid2 sent, spid2 valid

Endpoint ID Info: epsf = 0, usid = 3, tid = 1

Layer 3 Status:

0 Active Layer 3 Call(s)

Activated dsl 0 CCBs = 0

The Free Channel Mask: 0x80000003

Once in a while, you'll get this output from show isdn status:

R2#show isdn status The current ISDN Switchtype = basic-ni1 ISDN BRI0 interface

Layer 1 Status:

ACTIVE

Layer 2 Status:

Layer 2 NOT Activated

Spid Status:

TEI Not Assigned, ces = 1, state = 3(await establishment)

spid1 configured, no LDN, spid1 NOT sent, spid1 NOT valid

TEI Not Assigned, ces = 2, state = 1(terminal down)

spid2 configured, no LDN, spid2 NOT sent, spid2 NOT valid

Check your running configuration, and if the SPIDs look good, simply close the BRI interface and open it again. Then run show ISDN status again. If you then see 'spids are validร�ยขรขโ��ยฌร�ย�, you're ready to proceed. If you still see a message that the spids are invalid, you've most likely mistyped the SPID.

Show Access-List

What's this command got to do with ISDN? Everything.

Remember how the ISDN link comes up in the first place? Interesting traffic. By default, there is no interesting traffic. You define interesting traffic with the dialer-list and dialer-group commands, AND the access-list command. If you have a problem with your link never coming up or with it coming up and staying up, use this command to see what traffic has been defined as interesting.

Show Dialer

Another helpful command to determine why an ISDN link is coming up and staying up. This command shows you how many successful calls and failed calls have taken place, what the current idle-timer value is (by default, it's 120 seconds), and most importantly, what the source and destination was for the current interesting traffic:

R1#show dialer
BRI0 - dialer type = ISDN
Dial String Successes Failures Last called Last status
8358662 1 0 00:00:59
successful
0 incoming call(s) have been screened.
0 incoming call(s) rejected for callback.

BRI0:1 - dialer type = ISDN
Idle timer (120 secs), Fast idle timer (20 secs)
Wait for carrier (30 secs), Re-enable (15 secs)
Dialer state is data link layer up
Dial reason: ip (s=172.12.21.1, d=172.12.21.2) < s=Source, d=Destination >
Time until disconnect 62 secs
< Idle timer, reset by interesting traffic only >
Connected to 8358662 (R2)

Here, you can see that the idle-timer value is at its default, that there are 62 seconds left until the link comes down (unless interesting traffic resets the timer), and that the source of the interesting traffic was 172.12.21.1 and the destination is 172.12.21.2. If that destination is the multicast address of a routing protocol - say, 224.0.0.5 for OSPF - you know what traffic is keeping the line up.

Show ISDN History

Want to see what calls have been made in the last 15 minutes? Just run this command. It's helpful if you're walking in to an ISDN troubleshooting situation and want to see what calls have been made.

R1#show isdn
history-------------------------------------------------------------------------------- ISDN CALL HISTORY--------------------------------------------------------------------------------History table has a maximum of 100 entries.History table data is retained for a maximum of 15 Minutes.--------------------------------------------------------------------------------Call Calling Called Remote Seconds Seconds Seconds ChargesType Number .Number Name Used Left Idle Units/Currency-----------------------------------------------------------------------------------------------------------Out 8358662 R2 121 0Out 8358662 R2 121 0-----------------------------------------------------------------------------------------------------

Debug PPP Negotiation

Not only do you need to know this command for your CCNA and CCNP exams, you MUST know it to be an effective ISDN troubleshooter.

When PPP authentication is first configured, it's simple to mistype a password, or forget to configure a 'username / passwordร�ยขรขโ��ยฌร�ย� combination. Instead of continually reading your running configuration to see what the problem is, run debug ppp negotiation and send a ping to bring the line up. You'll quickly see where the problem is.

R2#debug ppp negotiation PPP protocol negotiation debugging is on R2#ping 172.12.21.1

BR0:1 PPP: Phase is AUTHENTICATING, by both < Both routers are authenticating the other with CHAP. > BR0:1 CHAP: O CHALLENGE id 1 len 23 from "R2" < R2 is sending a challenge to the remote router. O = 'outgoingร�ยขรขโ��ยฌร�ย�. > BR0:1 CHAP: I CHALLENGE id 1 len 23 from "R1" < A CHAP challenge has come in from R1. I = 'incomingร�ยขรขโ��ยฌร�ย�> BR0:1 CHAP: O RESPONSE id 1 len 23 from "R2" < R2 is sending a response to the challenge. > BR0:1 CHAP: I SUCCESS id 1 len 4 < A success message has come in , indicating the challenge was successfully met. > BR0:1 CHAP: I RESPONSE id 1 len 23 from "R1" < A response to the challenge sent to R1 is now coming in. > BR0:1 CHAP: O SUCCESS id 1 len 4 < The challenge was successfully met by R1, and a success message is sent. >

By mastering these simple ISDN show and debug commands, you increase your chances of passing the CCNA and CCNP exams greatly, and vastly improve your on-the-job skills.

I recommend you visit www.cisco.com/univercd for more show and debug commands. Learning to negotiate this valuable online resource will truly help you become more valuable on the job. Every Cisco router and switch command, along with default and usage guidelines, can be found on this site. I'll have an article posted soon to help you learn your way around the site; in the meantime, I urge you to begin adding this website to your troubleshooting toolkit.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNA exam with The Bryant Advantage!

Cisco CCNA Certification Exam Tutorial: Access List Details You Must Know!

To pass the CCNA exam, you have to be able to write and troubleshoot access lists. As you climb the ladder toward the CCNP and CCIE, you'll see more and more uses for ACLs. Therefore, you had better know the basics!

The use of "host" and "any" confuses some newcomers to ACLs, so let's take a look at that first.

It is acceptable to configure a wildcard mask of all ones or all zeroes. A wildcard mask of 0.0.0.0 means the address specified in the ACL line must be matched exactly a wildcard mask of 255.255.255.255 means that all addresses will match the line.

Wildcard masks have the option of using the word host to represent a wildcard mask of 0.0.0.0. Consider a configuration where only packets from IP source 10.1.1.1 should be allowed and all other packets denied. The following ACLs both do that.

R3#conf t

R3(config)#access-list 6 permit 10.1.1.1 0.0.0.0

R3(config)#conf t

R3(config)#access-list 7 permit host 10.1.1.1

The keyword any can be used to represent a wildcard mask of 255.255.255.255.

R3(config)#access-list 15 permit any

Another often overlooked detail is the order of the lines in an ACL. Even in a two- or three-line ACL, the order of the lines in an ACL is vital.

Consider a situation where packets sourced from 172.18.18.0 /24 will be denied, but all others will be permitted. The following ACL would do that.

R3#conf t

R3(config)#access-list 15 deny 172.18.18.0 0.0.0.255

R3(config)#access-list 15 permit any

The previous example also illustrates the importance of configuring the ACL with the lines in the correct order to get the desired results. What would be the result if the lines were reversed?

R3#conf t

R3(config)#access-list 15 permit any

R3(config)#access-list 15 deny 172.18.18.0 0.0.0.255

If the lines were reversed, traffic from 172.18.18.0 /24 would be matched against the first line of the ACL. The first line is "permit any", meaning all traffic is permitted. The traffic from 172.18.18.0/24 matches that line, the traffic is permitted, and the ACL stops running. The statement denying the traffic from 172.18.18.0 is never run.

The key to writing and troubleshoot access lists is to take just an extra moment to read it over and make sure it's going to do what you intend it to do. It's better to realize your mistake on paper instead of once the ACL's been applied to an interface!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Get your CCNA study guide from The Bryant Advantage!

The Advantages of Official Microsoft and Cisco Certification Training Courses

Lots of aspirants in design and network management channel all their efforts in order to obtain highly recognized certifications such as MCSE (Microsoft Certified System Engineer) and MCSA (Microsoft Certified System Administrator). These world-recognized certifications are much desired, as they can easily make the difference between a prosperous, lucrative career in designand an average, low-rewarding job as a programmer. Most people would do anything to obtain such world-recognized certifications and they invest lots of money and time in the process, with little or no prospect of ever achieving their goals.

There are thousands of scammers on the Internet who commonly lure people into buying various second-hand tutorials and self-study oriented training programs, promising great results with minimal effort. However, there are also many solid, reliable websites on the World Wide Web that provide students with elaborate, well-structured and comprehensive materials, facilitating the process of learning and guaranteeing success. Considering this fact, it is very important to distinguish between average speculants and professional websites that actually provide effective MCSE and MCSA training programs.

If your time allows it, consider attending to a short classroom training course instead of using self-study oriented programs. There are websites that offer advanced MCSE and MCSA accelerated training courses, laboratories and seminaries, taught by well-trained, experienced professionals. Such classes are far superior to self-training programs, as they involve active participation, better comprehension and learning, stimulating studentsรขโ�ฌโ�ข thinking and enhancing their overall skills. By participating to a 14-day official MCSE and MCSA training course, one is able to rapidly assimilate vital information regarding solution design and network management with the help of well-trained professionals. In addition, such training programs allow students to acquire a complete set of practical abilities that will help them in their future careers. Official MCSE and MCSA training programs guarantee graduates acceptance in the best companies of the w orld!

Similar to MCSE and MCSA, CCNA (Cisco Certified Network Associate) and CCIE (Cisco Certified Internetwork Expert) certifications are also highly requested in present. There are various professional training centers that offer people the opportunity to participate to elaborate CCNA and CCIE training programs in exchange for a reasonable sum of money. By attending a five or six-day CCNA and CCIE training course, students can quickly familiarize themselves with latest Cisco technologies and hardware. During CCNA and CCIE training sessions , attending students receive constant support and feed-back from well-trained professionals. Such training courses are not only focused on theory; they are also aimed at forming and enhancing studentsรขโ�ฌโ�ข practical skills regarding various aspects of Cisco technologies and hardware. Thousands of graduates recommend professional CCNA and CCIE training courses to people who wish to build a solid, successful c areer in the field.

So if you want to find out valuable information about MCSE training or CCNA training, or even CCIE training, please follow these links, they will direct you to the safest way to take your courses.

Cisco CCNA Exam Tutorial: Why Do We Use RFC 1918 Private Address Ranges?

When you're studying to pass the CCNA, you're introduced to "private addresses", the address ranges formally referred to as RFC 1918 Private Addresses. (RFC stands for Request For Comment; to see a typical RFC, just put that term in your favorite search engine.)

There are three ranges of 1918 Private Addresses, one in each major network class.

Class A: 10.0.0.0 /8

Class B: 172.16.0.0 /12

Class C: 192.168.0.0 /16

Be careful - these masks are not the classful network masks you're familiar with!

The need for private address ranges arose when we started running out of IP addresses! (A lot of us never thought that would happen, but a lot of us used to think weรขโ�ฌโ�ขd never need storage units bigger than floppy disks, too.) You can imagine that as networks began to be installed in offices and schools worldwide, the finite number of IP addresses became a restrictive factor.

Many devices that were using these precious IP addresses did not need to communicate with any device outside its own local area network (LAN). Therefore, these devices could be assigned an IP address that could be used on another device in another LAN - but these devices would not be able to communicate across the Internet.

It was decided to create network address ranges that would be used exclusively for such devices. That's why when you go from one local area network to another, you'll usually see hosts with IP addresses from the above three ranges.

Of course, as time went on, more and more of these devices did need to reach hosts across the Internet. That's where NAT - Network Address Translation - comes into play. But that is a subject for another tutorial!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Get your CCNA study guide with The Bryant Advantage!

Cisco CCNP / BSCI Tutorial: The BGP Attribute Next Hop

When you're studying for the BSCI exam on the way to earning your CCNP certification, you've got to master the use of BGP attributes. These attributes allow you to manipulate the path or paths that BGP will use to reach a given destination when multiple paths to that destination exist.

In this free BGP tutorial, we're going to take a look at the NEXT_HOP attribute. You may be thinking "hey, how complicated can this attribute be?" It's not very complicated at all, but this being Cisco, there's got to be at least one unusual detail about it, right?

The NEXT_HOP attribute is simple enough - this attribute indicates the next-hop IP address that should be taken to reach a destination. In the following example, R1 is a hub router and R2 and R3 are spokes. All three routers are in BGP AS 100, with R1 having a peer relationship with both R2 and R3. There is no BGP peering between R2 and R3.

R3 is advertising the network 33.3.0.0 /24 via BGP, and the value of the next-hop attribute on R1 is the IP address on R3 that is used in the peer relationship, 172.12.123.3.

The issue with the next-hop attribute comes in when the route is advertised to BGP peers. If R3 were in a separate AS from R1 and R2, R1 would then advertise the route to R2 with the next-hop attribute set to 172.12.123.3. When a BGP speaker advertises a route to iBGP peers that was originally learned from an eBGP peer, the next-hop value is retained.

Here, all three routers are in AS 100. What will the next-hop attribute be set to when R1 advertises the route to its iBGP neighbor R2?

R2#show ip bgp

< no output >

There will be no next-hop attribute for the route on R2, because the route will not appear on R2. By default, a BGP speaker will not advertise a route to iBGP neighbors if the route was first learned from another iBGP neighbor.

Luckily for us, there are several ways around this rule. The most common is the use of route reflectors, and we'll look at RRs in a future free BGP tutorial.

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNA exam with The Bryant Advantage!

How To Become A Cisco VPN Specialist

There's quite an emphasis on security in today's networks, and that's reflected in Cisco's certification tracks. Cisco offers a CCIE Security track and the Cisco Certified Security Professional (CCSP) intermediate-level certification, but there is no real equivalent to the CCNA on the security side. Instead, Cisco offers several different Security Associate certifications.

The good news is that youรขโ�ฌโ�ขve got a lot of security specializations from which to choose; the bad news is that youรขโ�ฌโ�ขve got a lot of choices! In choosing a specialization, take some time to choose a certification that will be of practical use to you in your current position or in your "dream job".

One of the more popular Security Associate certifications is the Cisco VPN Specialist certification. This two-exam track consists of a Securing Cisco Network Devices (SND, 642-551) exam and a Cisco Secure Virtual Private Networks (CSVPN, 642-511) exam. To earn the Cisco VPN Specialist exam, you must hold a valid CCNA certification.

What should you expect on these exams? On the SND exam, expect to be grilled on basic security features on both switches and routers, as well as VPN 3000 concentrators, PIXes, and IDS/IPS Sensors. You'll need to be ready to configure and troubleshoot basic AAA configurations, access-lists, syslog, AutoSecure, and much more. You should also be solid with IPSec.

IPSec will also be part of your CSVPN exam. As you'd expect, you'll also be expected to be quite good with the VPN 3000 Concentrator series, including browser configuration, creating users and group, the Windows VPN Software Client, and more.

This is a demanding certification that is an excellent addition to your resume and your skill set. For the latest on this and other Cisco certifications, you should regularly visit the Learning & Events section of Cisco's website. As a Cisco certification candidate, it's your responsibility to stay current of any additions and changes to Cisco's certification paths - and it's good for your career!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

CCNA Certification Exam Training: Passwords, Cisco Routers, And Network Security

CCNA certification is important, and so is securing our network's Cisco routers! To reflect the importance of network security, your CCNA certification exam is likely going to contain quite a few questions about the various passwords you can set on a Cisco router. Let's take a look at some of those passwords and when to apply them.

If the previous user has logged out of the router properly, you will see a prompt like this when you sit down at the router console:

R1 con0 is now available

Press RETURN to get started.

R1>

To get into enable mode, by default all I have to do is type "enable".

R1>enable

R1#

See how the prompt changed? By default, I can now run all the show and debug commands I want, not to mention entering global configuration mode and doing pretty much what I want. It just might be a good idea to password protect this mode! We do so with either the enable password command or the enable secret command. Let's use the enable password command first.

R1(config)#enable password dolphins

Now when I log out and then go back to enable mode - or try to - I should be prompted for the password "dolphins". Let's see what happens.

R1>enable

Password:

R1#

I was indeed prompted for a password. Cisco routers will not show asterisks or any other character when you enter a password; in fact, the cursor doesn't even move.

The problem with the enable password command is that the password will show in the configuration in clear text, making it easy for someone to look over your shoulder and note the password for future use, as shown below:

hostname R1

!

enable password dolphins

We could use the "service password-encryption" command to encrypt the enable password, but that will also encrypt all the other passwords in the Cisco router config. That's not necessarily a bad thing! Here's the effect of this command on the enable password we set earlier.

enable password 7 110D1609071A020217

Pretty effective encryption! However, if we want to have the enable password automatically encrypted, we can use the enable secret command. I'll use that command here to set this password to "saints", and note that I'm not removing the previous enable password.

R1(config)#enable secret saints

After removing the "service password-encryption" command, we're left with two enable mode passwords, and they appear in the Cisco router config like this:

enable password dolphins

enable secret 5 $1$kJB6$fPuVebg7uMnoj5KV4GUKI/

If we have two enable passwords, which one should we use to log into the router? Let's try the first password, "dolphins", first:

R1>enable

Password:

Password:

When you're prompted for the password a second time, you know you got it wrong the first time! Let's try "saints":

R1>enable

Password:

Password:

R1#

When both the enable secret and enable password commands are in use on a Cisco router, the enable secret password always takes precedence. "dolphins" didn't get us in, but "saints" did. That's valuable information for both the CCNA certification exam and real-world networks, because there's no worse feeling than typing a password at a Cisco router prompt and then getting another password prompt!

This is just one way to perform basic Cisco router security with passwords. We'll take a look at other methods in a future CCNA certification exam training tutorial!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of over 100 free certification exam tutorials, including Cisco CCNA certification test prep articles. His exclusive Cisco CCNA study guide and Cisco CCNA training is also available! Visit his blog and sign up for Cisco Certification Central, a daily newsletter packed with CCNA, Network+, Security+, A+, and CCNP certification exam practice questions! A free 7-part course, "How To Pass The CCNA", is also available, and you can attend an in-person or online CCNA boot camp with The Bryant Advantage!

Valuing Network Certifications - Is The Time, Money And Effort Worth The Bother?

There are many ways to get any of the large number of network certifications now available. There's not only software certification like those offered from Oracle, Java, Microsoft, etc. but there's also direct network hardware certifications from strong companies like Cisco and then there's the server administration, hardware repair, security and several sub category type certifications. All are available but the question is if these have any real value in the marketplace.

The answer, unfortunately is not simple. This is because while many companies demand a certain certification, they will also bend the requirement and allow you to get certified once you have the job. There's also people in the marketplace who are strong proponents of certification or another. The reason for this is usually because they have that certification and by requiring it, they somehow believe it validates their decision to obtain the training and pass the tests.

The reality is that like a good resume and education pedigree, certifications help get you in the door. Think about it for a moment. If you were hiring a network administrator, you would probably ask for the usually experience and basic education and some type of networking certification. If 100 people claiming the same skills and experiences levels all apply and all have at least the single required certification while 10 have not only the network cert but also maybe several MS and a security certificate, which candidates applying would probably get scheduled for interviews? Right! It would be the ones with the better paper qualifications.

So the value of a certification can be measured by it's recognition as important by employers, and the relative value they place on such training. If you're applying in network shops that value certifications, then they will naturally place a premium on the fact that your have that training and will probably reflect that in an increased earnings range.

The real key however is to recognize that employers are NOT employing you because you have a certification. You must have the skills necessary to do the job and meet the requirements of the position. No amount of certifications can make up for a strong work ethic and solid experience. With today's study materials, almost anyone can learn enough to pass the required tests and become certified. This however does not make anyone competent to work on a network anymore than walking into a garage makes one a mechanic. It's skills, talent and knowledge that are truly desired.

Microsoft Certifications are one of the most widely pursued and acclaimed professional certifications in the IT industry. Preparing MS certification tests, however, is a significant undertaking whether you're just out of college or have been in IT field for years. IT professionals are continuously demanded to acquire new knowledge in order to perform well on their jobs as new technology in the IT industry emerged at a pace that has never been seen before. Regardless what certifications (Microsoft Certified Professional or MCP, Microsoft Certified System Administrator or MCSA, Microsoft Certified System Engineer or MCSE ) you are pursuing, a thorough planning will increase the chance of success.

The importance of hands-on Experience, no matter if it's your own little network at home or at your job, experience matters! Being able to apply the knowledge gained by the study necessary to obtain your certification is just as important as the exam itself.

When preparing for any certification test, have a network available to physically learn the principles being taught. You network might only be a couple of old PC's and a switch but it's enough to understand the principles and basic information. You gain valuable skills that cannot be obtained any other way except through hands on work.

Finally, consider using CBT's or computer based training as part of your test preparation. These tools are a great way to take your level of understanding to a new level. This is also true of practice exams.

If you develop the skills necessary to support the certifications, all your training, costs and effort will pay off handsomely. With your knowledge and training, you can expect to be have an easier time getting considered for positions, moving up in a company, and enjoying a solid work career.

Abigail Franks writes on many subjects having to do with home, and Business. For more information on Network Certification go to http://www.vitalsource.org

Be Certifiable! The Basics of MCSE and MCP

It is not always who you know, but what you know. That is why obtaining Microsoft certification can be a valuable asset to your career. Of course, it does depend on what career path you want to take as to whether you want to get either MCSE training or MCP training or anything else for that matter. So what do those abbreviations MCSE and MCP stand for anyway?

MCP stands for Microsoft Certified Professional and MCSE is an abbreviation for Microsoft Certified Systems Engineer. What exactly does having a Microsoft certification mean anyway? We know that it looks good on a resume and opens new doors in your career. Did you know that being certifiable - in Microsoft anyway - sometimes will also boost your pay? Experience counts for a lot, but having a Microsoft certification or two does not hurt either!

So what does it take to be and MCP or MCSE? Lots of studying! The MCP courses and MCP exams are geared toward a more rounded technical professional. Candidates for MCP must pass one current certification test from Microsoft. Passing one of the exams demonstrates that the candidate has a consistent level of technical expertise.

With the Microsoft Certified Systems Engineer path, there are MCSE boot camps that help prepare candidates for the MCSE exams. These MCSE boot camps are intense classes often packed into a full two week period instead of the traditional weekly MCSE training classes in preparation for the MCSE exams. This path is more involved. MCSE certification is standard in the IT field and prepares you for anything from the design of a system's infrastructure to analyzing the company's needs before implementing a design.

Unlike those individuals who take the MCP training to prepare for MCP exams, students of MCSE have a course of study that is more intense. Instead of one test to prepare for, they have seven tests that they are required to pass to get their Microsoft certification. Yikes! Seven! They have five main exams to take as well as two electives. The five required MCSE exams are broken down into four operating system exams and one design exam. The two electives typically deal with other issues in design and implementation not covered in the five core tests.

After learning a few basics, it is easy to see that the MCP or Microsoft Certified Professional is really just a stepping stone to bigger and greater things in the world of Microsoft certification. The individuals who go for the MCP have a leg up on those peers who have no technical experience. They will have a better grasp on technical issues and usually stay a step ahead of trends. The MCSE is more specialized and appeals to the techno geek with a penchant for design and implementation. They like knowing how stuff works. So market yourself and become certifiable!

James Croydon, Microsoft Certified Professional and MCSE Certification Online advisor - focusing on MCSE Courses Online and Boot Camp MCSE

Cisco CCNA / CCNP Certification Exam Tutorial: Troubleshooting EIGRP

Part of earning your CCNA and CCNP - especially passing the difficult CIT exam - is becoming a master network troubleshooter. Today, we'll take a look at troubleshooting EIGRP and spotting common errors.

Most adjacency issues are easily resolved - mistyped IP address, bad wildcard mask in the neighbor statement, mistyped EIGRP AS number, and so forth. You know the AS number has to match, but always double-check that. Next, check the wildcard mask to make sure the correct interfaces are EIGRP-enabled. In the following example, we've configured three loopbacks on R2 and want to advertise all three loopbacks via EIGRP, but R4 only sees one.

R2(config)#int loopback1

R2(config-if)#ip address 10.1.1.1 255.255.255.0

R2(config-if)#int loopback2

R2(config-if)#ip address 10.1.2.1 255.255.255.0

R2(config-if)#int loopback3

R2(config-if)#ip address 10.1.3.1 255.255.255.0

R2(config-if)#router eigrp 100

R2(config-router)#no auto

R2(config-router)#network 10.1.1.0 0.0.0.255

R2(config-router)#network 172.12.23.0 0.0.0.255

R4#show ip route eigrp

10.0.0.0/24 is subnetted, 1 subnets

D 10.1.1.0 [90/409600] via 172.12.23.2, 00:00:25, Ethernet0

We know it's not an adjacency issue, because R4 has to have an adjacency to get the route. Perhaps the config on R2 is the problem.

R2(config-if)#router eigrp 100

R2(config-router)#no auto

R2(config-router)#network 10.1.1.0 0.0.0.255

R2(config-router)#network 172.12.23.0 0.0.0.255

The only one of the three networks that matches that network statement is 10.1.1.0 /24. As a result, the networks 10.1.2.0 /24 and 10.1.3.0 /24 will not be advertised.

We could use a network statement with 10.1.0.0 0.0.255.255 to successfully advertise the loopbacks, but by breaking the three networks down into binary, we can see that the three networks have the first 22 bits in common. Therefore, a better wildcard mask to use is 0.0.3.255.

R2(config-router)#no network 10.1.1.0 0.0.0.255

R2(config-router)#network 10.1.0.0 0.0.3.255

R4#show ip route eigrp

10.0.0.0/24 is subnetted, 3 subnets

D 10.1.3.0 [90/409600] via 172.12.23.2, 00:00:36, Ethernet0

D 10.1.2.0 [90/409600] via 172.12.23.2, 00:00:36, Ethernet0

D 10.1.1.0 [90/409600] via 172.12.23.2, 00:00:36, Ethernet0

Another factor that must match between potential EIGRP neighbors is the K-metrics, or metric weights. Let's change the EIGRP metric weights on R2 and watch the effect on its adjacency with R4.

R2(config)#router eigrp 100

R2(config-router)#metric weights 0 1 2 3 4 5 ?

03:33:18: %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 172.12.23.4 (Ethernet0) is down: metric changed

03:33:20: %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 172.12.23.4 (Ethernet0) is down: K-value mismatch

The adjacency goes down, and the router's kind enough to tell you that it's the result of the metrics changing. We'll also see that message on R4, but just in case you don't see it, debug eigrp packet will indicate the K-value mismatch as well.

R4#debug eigrp packet

EIGRP Packets debugging is on

(UPDATE, REQUEST, QUERY, REPLY, HELLO, IPXSAP, PROBE, ACK)

3w2d: EIGRP: Received HELLO on Ethernet0 nbr 172.12.23.2

3w2d: AS 100, Flags 0x0, Seq 0/0 idbQ 0/0

3w2d: K-value mismatch

3w2d: %DUAL-5-NBRCHANGE: IP-EIGRP 100: Neighbor 172.12.23.2 (Ethernet0) is down:K-value mismatch

The changed K-values will also appear in the running configuration. This is one time when you don't have to depend on debugs to know what the problem is - the router's going to scream at you until you fix it!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNA and CCNP tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages. You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website. For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", visit the website and download your free copies. You can also get FREE CCNA and CCNP exam questions every day! And coming in 2007 -- Network+ and A+ Certification from The Bryant Advantage!

Cisco CCNP / BSCI Exam Tutorial: RIP Update Packet Authentication

When you earned your CCNA, you thought you learned everything there is to know about RIP. Close, but not quite! There are some additional details you need to know to pass the BSCI exam and get one step closer to the CCNP exam, and one of those involves RIP update packet authentication.

You're familiar with some advantages of using RIPv2 over RIPv1, support for VLSM chief among them. But one advantage that you're not introduced to in your CCNA studies is the ability to configure routing update packet authentication.

You have two options, clear text and MD5. Clear text is just that - a clear text password that is visible by anyone who can pick a packet off the wire. If you're going to go to the trouble of configuring update authentication, you should use MD5. The MD stands for "Message Digest", and this is the algorithm that produces the hash value for the password that will be contained in the update packets.

Not only must the routers agree on the password, they must agree on the authentication method. If one router sends an MD5-hashed password to another router that is configured for clear-text authentication, the update will not be accepted. debug ip rip is a great command for troubleshooting authenticated updates.

R1, R2, and R3 are running RIP over a frame relay cloud. Here is how RIP authentication would be configured on these three routers.

R1#conf t

R1(config)#key chain RIP

< The key chain can have any name. >

R1(config-keychain)#key 1

< Key chains can have multiple keys. Number them carefully when using multiples. >

R1(config-keychain-key)#key-string CISCO

< This is the text string the key will use for authentication. >

R1(config)#int s0

R1(config-if)#ip rip authentication mode text

< The interface will use clear-text mode. >

R1(config-if)#ip rip authentication key-chain RIP

< The interface is using key chain RIP, configured earlier. >

R2#conf t

R2(config)#key chain RIP

R2(config-keychain)#key 1

R2(config-keychain-key)#key-string CISCO

R2(config)#int s0.123

R2(config-subif)#ip rip authentication mode text

R2(config-subif)#ip rip authentication key-chain RIP

R3#conf t

R3(config)#key chain RIP

R3(config-keychain)#key 1

R3(config-keychain-key)#key-string CISCO

R3(config)#int s0.31

R3(config-subif)#ip rip authentication mode text

R3(config-subif)#ip rip authentication key-chain RIP

To use MD5 authentication rather than clear-text, simply replace the word "text" in the ip rip authentication mode command with md5.

Here's what a successfully authentication RIPv2 packet looks like, courtesy of debug ip rip. Clear-text authentication is in effect and the password is "cisco".

3d04h: RIP: received packet with text authentication cisco

3d04h: RIP: received v2 update from 150.1.1.3 on Ethernet0

3d04h: 100.0.0.0/8 via 0.0.0.0 in 1 hops

3d04h: 150.1.2.0/24 via 0.0.0.0 in 1 hops

Here's what it looks like when the remote device is set for MD5 authentication and the local router is set for clear-text. You'll also see this message if the password itself is incorrect.

3d04h: RIP: ignored v2 packet from 150.1.1.3 (invalid authentication)

"Debug ip rip" may be a simple command as compared to the debugs for other protocols. but it's also a very powerful debug. Start using debugs as early as possible in your Cisco studies to learn how router commands really work!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

Cisco CCNP / BCMSN Exam Tutorial: Multicasting And The RPF Check

Multicasting is a vital topic on your BCMSN, CCNP, and CCIE exams, and it can also be very confusing when you first start studying it. Multicasting uses concepts that are unlike anything you've run into in your routing protocol studies, and that can throw you at first. I speak from experience that multicasting is like any other Cisco technology - learn the basics, master the fundamentals, and then build your skills on that foundation.

One such fundamental is the RPF Check, or Reverse Path Forwarding Check.

A fundamental difference between unicasting and multicasting is that a unicast is routed by sending it toward the destination, while a multicast is routed by sending it away from its source.

"toward the destination" and "away from its source" sound like the same thing, but they're not. A unicast is going to follow a single path from source to destination. The only factor the routers care about is the destination IP address - the source IP address isn't a factor.

With multicast routing, the destination is a multicast IP group address. It's the multicast router's job to decide which paths will lead back to the source (upstream) and which paths are downstream from the source. Reverse Path Forwarding refers to the router's behavior of sending multicast packets away from the source rather than toward a specific destination.

The RPF Check is run against any incoming multicast packet. The multicast router examines the interface that the packet arrived on. If the packet comes in on an upstream interface - that is, an interface found on the reverse path that leads back to the source - the packet passes the check and will be forwarded. If the packet comes in on any other interface, the packet is dropped.

The RPF Check serves to verify the integrity of your multicasting network, and also serves as a reminder that the basic operation of multicasting is a lot different than unicasting!

Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage, home of free CCNP and CCNA tutorials, The Ultimate CCNA Study Package, and Ultimate CCNP Study Packages.

You can also join his RSS feed and visit his blog, which is updated several times daily with new Cisco certification articles, free tutorials, and daily CCNA / CCNP exam questions! Details are on the website.

For a FREE copy of his latest e-books, "How To Pass The CCNA" and "How To Pass The CCNP", just visit the website! You can also get FREE CCNA and CCNP exam questions every day! Pass the CCNP exam with The Bryant Advantage!

Why Get a Microsoft MCSE Certification?

In the years of the dot com boom and bust, the Microsoft MCSE Certification has gotten its eye blackened over an over. Paper Microsoft MCSE's who were excellent at finding brain dumps and passing exams gave the Microsoft MCSE Certification a bad name. What used to be a guarantee of a nice salary is now ridiculed in some ignorant circles. After working in the Information Technology field for twelve years I still believe the Microsoft MCSE Certification is worth every dollar you spend and every hour spent in study and practice. I'll share my history with the Microsoft MCSE Certification and why I still believe itรขโ�ฌโ�ขs a valuable certification credential.

My History: Pre Microsoft MCSE

When I started out as a PC LAN Analyst I wanted to someday run my own shop. The best way I felt to get there was to study for the much sought after Novell CNE and Microsoft MCSE Certification. Because I worked in a Novell environment and had no opportunity to work with Windows NT I started on my Novell CNE Certification. I went book by book purchasing them on eBay and reading while I worked a second job. The CNE was also an easier certification to get as the answers to the exam came direct from the books. Microsoft's MCSE Certification exams tend to generalize on the concepts from the books rather than the text verbatim. Once complete with the CNE I had a full understanding of Novell's File Server and their weak attempt at a firewall/web server. I understood archaic technologies like IPX and Token Ring as well as networking technologies used today such as Ethernet, and TCP/IP I at least had enough knowledge to perform well at my job and work as an IT Consultant where I formed my own business Gall Consulting which runs today as a successful income.

After getting my CNE Certification I finally got a job running my own show. I had one Novell 3.12 server which ran the entire company. Within a year we began to work with Microsoft Windows NT 3.51 and NT 4.0 was just on the scene. I began the lengthy study of the seven Microsoft MCSE exams. When I had completed the Microsoft MCSE certification a year later I was like Yoda around the job. I had a complete set of knowledge about Windows Networking and Windows Applications. Because I completed the entire set of Microsoft MCSE exams and coursework I knew the technology and the theory behind the technology. This led to high performance as a Senior LAN Administrator. Rather than a swiss cheese education I had a thorough understanding of Microsoft Windows technology and could adapt to new situations easily.

NT 4.0 to Windows 2000 MCSE

When Windows 2000 Server and Active Directory was released we faced a problem. My small Novell to small Microsoft NT Domain, had grown to a world wide enterprise with five domains including various trusts going everywhere. DNS was handled by our UNIX group and we had to find a way to learn a new technology, create a single corporate Active Directory Domain and use Dynamic DNS on our Windows Active Directory domain controllers yet co-exist with our UNIX administrators who were none to happy to have to share DNS. Faced with this challenge I returned to what worked in the past. I studied for the Windows 2000 MCSE Certification

As I did before I started at the beginning and worked my way through each course and exam until I had completed my Windows 2000 MCSE Certification. By now I had a great career as an IT Operations Manager and no one was going to hire or pay me extra just for getting my Microsoft MCSE Certification. This is the true value of the certification. It started as my drive to obtain career credentials and became a vehicle to ensure I had an entire breadth of knowledge that would let me take on monumental tasks. Needless to say, today we have a single corporate Active Directory domain with a few sub domains necessary for DMZ areas.

Our DNS works so well the UNIX group asked us to take over and we're able to build on Active Directory as a source of valuable corporate data. My point in this article is to look at the Microsoft MCSE Certification as a way to ensure you have all the knowledge rather than just what's necessary in the short term. Knowing why something works is much more powerful than knowing just enough to build it in the first place the coursework involved in the Microsoft MCSE Certification provides this. I can say without fail, EVERY Information Technology professional I've worked with that had a Microsoft MCSE Certification performed at a MUCH higher level than those who only had on the job experience or had only studied what they needed to complete their daily tasks.

About The Author

John Gall is a full time IT Manager and IT Consultant in Minnesota. He runs several websites as a hobby featuring content similar to that in this article.

http://www.napavalleypictures.com; http://www.gallconsulting.com; http://www.sandalspictures.com; http://www.microsoftclassaction.com