CCENT Question 105: Troubleshooting Ping Failure

CCENT Question 105: Troubleshooting Ping Failure

🕔10:41, 1.Mar 2013

When I wrote the previous #CCENT troubleshooting question, I kept coming up with some really good answers, at least good for learning those subtle points that people miss when they don’t dig into the topics deeply enough. So, I made

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CCENT Question 103: IPv4 ARP Tables

CCENT Question 103: IPv4 ARP Tables

🕔09:05, 19.Feb 2013

Here’s another #CCENT question that makes you think about both layer 2 and 3. PC1 and PC2 successfully connect to a web server. What ARP table entries should exist at the end of that process?

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CCENT Answer 102: Switch MAC Learning

CCENT Answer 102: Switch MAC Learning

🕔09:05, 11.Feb 2013

Today’ post gives the letter answer, and explains why, for this latest #CCENT question. The question focuses on switch learning, with a little layer 3 weaved in. Don’t read here until you try the question!

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CCENT Question 102: Switch MAC Learning

CCENT Question 102: Switch MAC Learning

🕔12:17, 8.Feb 2013

Here’s another #CCENT question that kicks up a small notch. PC1 successfully connects to a web server. What MAC address table entries are learned? To answer, you have to think about not just layer 2, but also layer 3, and

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CCENT Practice Question 101: Combining Protocols

CCENT Practice Question 101: Combining Protocols

🕔09:05, 30.Jan 2013

One of the tougher things to do for #CCENT is to get used to all the new acronyms and figure out how they all fit together. Today I’ll start with a somewhat basic ICND1-level #CCENT question that gives you a

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

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

🕔11:18, 10.Apr 2012

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

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

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

🕔14:24, 6.Apr 2012

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

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Auto-summary Essentials + an Example

Auto-summary Essentials + an Example

🕔13:00, 12.Nov 2011

Today’s post is a ramble on the [no] auto-summary command. Think you know it? The proof of the pudding: give me one sentence that specifically states on what routers you need to consider the auto-summary setting, and characterize what happens

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An auto-summary exercise

An auto-summary exercise

🕔09:16, 9.Nov 2011

I just wrapped a Config Museum lab over in the CCENT Skills blog, but it happened to bring up a nice CCENT topic: auto-summary. Many people struggle with the concept. So I figured I’d use that lab as a backdrop

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Answer to Serial Link Interview Question

Answer to Serial Link Interview Question

🕔09:52, 3.Jun 2011

Today’s post lists the answers to last week’s question about serial links. The question basically shows a diagram, plus some show command output, and asks what you know for sure based on the output in the command. Answer is below

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