CCNA Crash Course Student QA Post

By certskills January 31, 2022 14:25

CCNA Crash Course - Q&A Post

I teach a CCNA course on O’Reilly Online titled “CCNA Crash Course”. During the multi-day course, if students have questions, they can come here to ask follow-up questions. Simple enough.

Note: When you add your first few comments here the anti-spam features do not allow your post to display until I manually approve it. So please be patient. When the course is active I plan to check multiple times during business hours in US Eastern Time (UTC-5).

About the CCNA Crash Course

O’Reilly Online Learning offers a large variety of books, videos, labs, and live learning events. I’ve been teaching there since 2019, and in 2022 I began teaching the CCNA Crash Course at their site. The CCNA Crash Course sets about to help you learn as much of the CCNA content as possible within the 16 hours of the live course, with a study plan for other activities to do outside the course.

The blog post you came across today happens to be specifically for the CCNA Crash Course scheduled for Feb 7, 8, 14, 15 in the year 2022. You’re welcome to join the course! If you do not yet have a subscription to O’Reilly, if you time it right, you might be able to attend the whole course during an O’Reilly trial period as well.

For future classes, you can try this link, which shows all of the classes I’m scheduled to teach. Or just go to and search.

Announcing: New Config Labs, with Packet Tracer and CML Support
IPv6 Drill 1
By certskills January 31, 2022 14:25
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  1. Dakota December 21, 01:39

    Hello, I’m not sure where to ask this but in your CCNA 200-301 Volume 1 book, Chapter 9 Figures 9-5 and 9-6. You say G0/1 from SW3 had a cost of 5. I’m stuck on this part trying to figure out why? Am I missing something?

    Reply to this comment
    • Wendell Odom December 21, 13:07

      Hi Dakota,
      Yeah, I think you’re restricting your thinking to default port costs only. The port cost can be configured to a positive integer. In that example, there’s one interface that uses a non-default value.

      Reply to this comment
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