 Category :: Computer Certification Articles |
Author :: Chris Bryant  |
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| Article Title :: Cisco Certification: The OSI Model Isn't Just For Exams Anymore! |
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| There's nothing I enjoy more than teaching Cisco technologies, especially CCNA candidates. Whether it's in-person or online, everyone's excited to be there. There's a sense of anticipation in the air, and everyone is ready to work hard, get their hands on the racks of Cisco routers and switches I have available...... and then I break out the OSI model chart. Chins slump. People sigh, or at least wish they hadn't ordered decaf that morning.Okay, it's not that bad. But it does temper the excitement a little. I always get a sense of "why can't we just hurry up and get on the routers and switches? Why do we have to learn this dry stuff?"One reason is that Cisco de (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA Certification: The Hidden Details Of Telnet |
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| Telnet is a simple yet powerful program that allows you to connect to a remote Cisco router or switch, and then configure it as though you were right at the console. Telnet is also one of those features that seems so very simple, until you get asked a half dozen questions about it on your CCNA exams. As with all topics, it’s the details you know about Telnet that will help you pass the Intro and ICND exams.Let’s take a look at a few of these details. We’ll begin by debunking one common belief about Telnet:Telnet runs at layer 7 of the OSI model, not layer 3!It’s easy to think that Telnet runs at Layer 3 of the OSI model, the Network layer. After all, youâ (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA Certification: Passwords, Passwords, Passwords! |
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| When you’re looking at a Cisco router configuration, figuring out what the different passwords do can be a little confusing at first. But as I tell all my students, the key to understanding something that looks complex is to break it down to smaller parts.Having said that, let’s take a look at a typical running configuration and then break it down line by line to make sure you understand what each password is doing. This is a must for success on exam day and on the job!Username r1 password routerUsername chris password BryantUsername david password stimpsonEnable password ciscoEnable secret ccnaService password-encryptionLine c (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco Certification: Suggested Toplogies For Your Home CCNA / CCNP Lab |
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| When you make the decision to put your own home lab together for your CCNA and CCNP studies (a very wise decision, if I may say so!), the hardest part is figuring out how to spend your budget. Do you spend it all on the routers and go with a cheaper 1900 switch, knowing that the 640-801 (CCNA), 640-821 (Intro), and 640-811 (ICND) exams now place a premium on knowing the ins and outs of a 2950 switch? Do you buy a frame relay switch? Do you buy an access server?One factor to keep in mind when you're starting to put your lab together is that you don't have to put it all together at one time. With some careful planning, you've got a lab that you can use for your Intro studies, per (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA Certification: An Illustrated Guide To Ethernet CSMA/CD |
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| When you're studying for your CCNA exams, you're going to study the theory of technologies we basically take for granted in networking. CSMA/CD is one of those technologies. It works beautifully and you don't even have to configure it. But to be an effective network troubleshooter (and to pass the 640-811, 640-801, and 640-821 exams), you have to know Ethernet inside and out, and that means knowing CSMA/CD.The first Ethernet standards were 10Base5 and 10Base2. Network devices such as hubs, repeaters, and switches weren't in the picture yet. The sole physical components were the Ethernet cards in the computers and coaxial cable. The cable made up a bus that all the connected dev (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco Certification: The Definitive Guide To ARP, IARP, RARP, and Proxy ARP |
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| When I first started studying for my CCNA years ago, one of the (many) things that confused me was ARP. Or rather, what ARP did as opposed to Reverse ARP, Inverse ARP, and Proxy ARP! One book would mention ARP without mentioning the other variations, one would mention RARP but not Proxy ARP, and so on...I got through my Intro and ICND exams, but I never forgot how confusing this was to me when I started. (And we all start somewhere!) To help current CCNA candidates with this confusing topic, let's take a look at each one of these technologies.ARP - Address Resolution ProtocolYou may well know what ARP does from your networking studies or work on a LAN, but to effe (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
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| Article Title :: Cisco CCNA / CCNP Home Lab Tutorial: Starting Over |
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| When you're preparing for success on your CCNA or CCNP certification exams, sooner or later you're going to want to start totally from scratch on your Cisco routers and switches. It's easy enough to type "write erase" and "reload", but there are a few details you have to watch if you want your home lab or rack rental devices to act as though they just came out of the box.
The first step is indeed to run the command write erase, and then reload the router. You're going to be prompted with a question before the reload starts, though, and you have to give the right answer .... or your configuration will still be there when you reload!
First, you will be prompted to con (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA / CCNP Certification: OSPF ASBRs Explained And Illustrated |
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| When I first started studying for my CCNP, some of the concepts of OSPF really confused me. This was especially true for the ASBR, stub areas, and total stub areas. Sure, I could memorize the LSA types associated with these devices and area types, but there just weren't any illustrations that explained exactly what was going on.This CCNP tutorial shows an ASBR in operation, and also introduces you to a basic example of route redistribution. Don't worry, it gets more complicated. :)Here's the network we'll be working with in this tutorial:R5|R1/R2 R3Networks:R1 - R5 Ethernet Segment: 10.1.1.0 /24R1 - R2 - R3 Serial Segm (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco Certification: Don't Delay Those CCNA Studies! |
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| Every once in a while, a rumor floats that Cisco’s getting ready to change the version number of their CCNA and CCNP exams, which also means the questions will be changed.This prompts a flurry of posts to certification boards around the ‘Net (and my mailbox!), with Cisco certification candidates in particular wondering if they should hold off on their studies until the next exam versions come out.The answer is an unequivocal no. NO. You should never delay your studies for any reason, but especially this one.Let’s say Cisco changes the CCNA exams tomorrow. They’re not going to remove questions regarding LAN switching. They’re not going to take distance-ve (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco Certification: The Most Important Cisco Study You'll Ever Do |
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| All of us are familiar with the pyramids of Egypt. These magnificent structures have stood for thousands of years, withstanding extreme heat and other factors that would bring down an ordinary structure.When we look at these pyramids, we instinctively look toward the peak. We tend to do the same with the Cisco Learning Pyramid. If you're not familiar with this, Cisco uses a pyramid to illustrate how the CCIE is at the peak of the Cisco certification structure, with the CCNP in the middle and the CCNA at the bottom.I'm often asked how to become a CCIE. My response is always "Become a master CCNA and a master CCNP first". That answer is often followed by a puzzled look, as tho (read full article) |
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