April 10, 2012

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Answer to a Question with STP, 802.1Q, ARP, and MAC tables

I got started on this discussion of the previous post’s sample question based on a question from a reader of the ICND2 Cert Guide. For the discussion of the answers, I’d like to focus on the one answer that makes you think about both layer 2 and layer 3 forwarding to answer the question: Answer […]

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April 6, 2012

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An MC Question with STP, 802.1Q, ARP, and MAC tables

Today’s post is a question that comes with the ICND2 Official Cert Guide. A reader had sent in an errata email, claiming the question was wrong (it wasn’t in this case), but this question is packed with tons of learning points. I thought it’d be a good one to review here in the blog. I’ll […]

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March 9, 2012

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Answers, Part 4, OSPF Lab (CCNA Lab 4)

Today’s post completes the answers to the OSPF lab by listing answers to Part 4. This part looks at the OSPF Router ID concept, and how to configure it. It’s a pretty basic conclusion to the lab, but like most of this stuff, it helps to get in some reps, so the lab spells out […]

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March 6, 2012

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Answers, Part 3, OSPF Lab (CCNA Lab 4)

Today’s post looks at Part 3 of the answers to the OSPF lab recently posted in this blog, with the topic of OSPF. The lab shows how to break down the components that affect the metric for an intra-area OSPF router, as well as showing how to change the OSPF cost components both directly and […]

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February 29, 2012

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OSPF Webinar Link Plus Questions Answered

Pearson Education, publishers of the Cisco Press products, hosted me for a CCNA-level OSPF web cast back in February 2012. (You can go here to watch the video of the webcast.) Anyway, during the webcast, anyone watching could send in a question, and there was a set time for me to answer. I answered some […]

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February 23, 2012

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Answers, Part 2, OSPF Lab (CCNA Lab 4)

Today’s post looks at Part 2 of the answers to the OSPF lab recently posted in this blog. Part 2 looks at OSPF authentication. In this case, one router (R1) needs to use all three types of OSPF authentication: none, simple password, and MD5. The other three routers each use only one type of OSPF […]

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February 16, 2012

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Answers, Part 1, OSPF Lab (CCNA Lab 4)

Today’s post looks at Part 1 of the answers to the OSPF lab recently posted in this blog. Part 1 looks at the IP address config as well as how to configure OSPF to match the listed requirements. The lab makes more sense if you look at the original lab post first! Quick links below: […]

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February 8, 2012

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OSPF Lab (CCNA Lab 4)

Today’s post kicks off a new CCNA-level lab on OSPF, in conjunction with a webinar I’m doing with Cisco Press on February 15th. The short version: today’s post lists the lab problem statement. Upcoming posts will list the answers, comments about the lab, and give us a place to discuss that particular part of the […]

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January 30, 2012

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Answers: Summary Route Drill 3

This post lists the answers to summary route drill 3. If you’ve not tried the problems for this drill yet, go back, check it out, and come up with the best summary routes. Then come back here and check your answers. Here are some other useful links as well: All the Summary Route Drills in […]

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January 28, 2012

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Summary Route Drill 3

Like the other summary route drills, this post lists three practice problems. Each problem lists a set of subnet/mask pair for existing routes in some router. Your job: choose the subnet/mask pair to use as the best summary route that includes the addresses in all the routes in the original list. Here are some other useful […]

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