 Category :: Computer Certification Articles |
Author :: Chris Bryant  |
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| Article Title :: Cisco CCNA Certification Exam Tutorial: RIP Details You Must Know |
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| RIP isn't exactly the most complex routing protocol on the CCNA exam, but that makes it easy to overlook some of the important details you must keep in mind in order to pass the exam! To help you review for the exam, here are just a few of those details!RIP’s default behavior is to send version 1 updates, but to accept both version 1 and 2 routing updates.R2(config)#router ripR2(config-router)#net 172.16.0.0R2(config-router)#^ZR2#show ip protocolsRouting Protocol is "rip"Sending updates every 30 seconds, next due in 6 secondsInvalid after 180 seconds, hold down 180, flushed after 240Outgoing update filter list for all inter (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNP / BCMSN Exam Tutorial: Multicasting And Reserved Addresses |
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| Ever since you picked up your first CCNA book, you've heard about multicasting, gotten a fair idea of what it is, and you've memorized a couple of reserved multicasting addresses. Now as you prepare to pass the BCMSN exam and become a CCNP, you've got to take that knowledge to the next level and gain a true understanding of multicasting. Those of you with an eye on the CCIE will truly have to become multicasting experts!Having said that, we're going to briefly review the basics of multicasting first, and then future tutorials will look at the different ways in which multicasting can be configured on Cisco routers and switches.What Is Multicasting?A unicast is data th (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNP / BSCI Exam Tutorial: OSPF Route Redistribution Review |
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| OSPF route redistribution is an important topic on the BSCI exam, and it's a topic full of details and defaults that you need to know for the exam room and the job. To help you pass the BSCI exam, here's a quick review of some of the OSPF route redistribution basics.To see if a router is an ABR or ASBR, run show ip ospf. This also displays any routes being redistributed into OSPF on this router.R1#show ip ospfRouting Process "ospf 1" with ID 1.1.1.1Supports only single TOS(TOS0) routesSupports opaque LSAIt is an area border and autonomous system boundary routerRedistributing External Routes from,connected, includes subnets in redistr (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
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| Article Title :: CCNP Certification / BCMSN Exam Tutorial: HSRP MAC Addresses And Timers |
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| To earn your CCNP certification and pass the BCMSN exam, you've got to know what HSRP does and the many configurable options. While the operation of HSRP is quite simple (and covered in a previous tutorial), you also need to know how HSRP arrives at the MAC address for the virtual router - as well as how to configure a new MAC for this virtual router. This puts us in the unusual position of creating a physical address for a router that doesn't exist!
The output of show standby for a two-router HSRP configuration is shown below.
R2#show standby
Ethernet0 - Group 5
Local state is Standby, priority 100
Hellotime 3 sec, holdtime 10 (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant, CCIE #12933 |
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| Article Title :: CCNP / BSCI Exam Tutorial: Route Summarization And The OSPF Null Interface |
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| 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.
(read full article) |
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| Category :: Computer Certification Articles |
Author :: Natalie Aranda |
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| Article Title :: The Brief History of Cisco Certifications |
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| Even young people can remember the old days when network administrators were more often associated for being the person sitting next to a computer system rather than for specific abilities of proficiency. In those early days, CCNA Certification or CCNA training were concepts totally ignored by most small-to-medium businesses, and they never asked a network administrator to apply for a CCNA course.In fact during long time, many office managers just learned a few computer tricks to qualify as network administrator because a Cisco Certified Network Associate (CCNA) was only known as inter networking became more complex. The increasingly sophistication in design and equipment requiring (read full article) |
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| Category :: Computer Certification Articles |
Author :: Natalie Aranda |
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| Article Title :: The History of Microsoft Certifications - Now and Then |
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| When Microsoft announced recently that the new generation of Microsoft Certifications had just arrived, they inevitably made one stop for a moment remembering how all started and evolved throughout history with over 10 years of certifications to date.Ten seems to be a determined number in the new generation of certification provided by the leading Internet company than the last year, also announced the new MCA, the Microsoft training practical exam, which is graded by a board of examiners.As no written exam, the Microsoft Certified Architect (MCA) requires at least 10 years experience in IT, and 3 years of practical experience as a network architect to apply. With this panor (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNP / BCMSN Exam Tutorial: Multicasting And The RPF Check |
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| 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 a (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA Certification Exam Tutorial: Variance And Unequal Cost Load Balancing |
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| To pass the CCNA exam, you've got to know how to work with IGRP and EIGRP unequal-cost load balancing. You may not see much IGRP in production networks anymore, but you'll see a lot of EIGRP, and part of fine-tuning your EIGRP network is making sure that all paths are in use while allowing for varying bandwidth rates.Using the variance command is the easy part - it's getting the metric that's the hard part with IGRP. With EIGRP, you just look in the topology table and that's it. With IGRP, you've got to run a debug to get the right metric.The variance command is a multiplier when the value supplied with the variance command is multiplied by the lowest-cost metric, it must ex (read full article) |
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| Category :: Computer Certification Articles |
Author :: Chris Bryant |
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| Article Title :: Cisco CCNA / CCNP Home Lab Tutorial: The 2503 Router |
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| I know from experience that part of the excitement and anxiety of putting together your own CCNA / CCNP home lab is deciding what to buy! While you can make a workable home lab out of almost any combination of Cisco routers and switches, some routers are better suited for home lab work than others because they can fill multiple roles.When you buy CCNA or CCNP "lab kits" - bundles of routers and switches - you can get a little confused about whether you're getting a good deal. One router I get asked about quite a bit is the 2503.2503 routers are fantastic for CCNA and CCNP home labs. They come with two serial interfaces, allowing you to connect one interface directly to ano (read full article) |
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