Interview Review: VLANs, Trunking, and LAN Switching

In this interview review, we dive deep into the world of VLANs, trunking, and LAN switching to help you gain knowledge and clarity on these important networking concepts. Whether you're preparing for a job interview or just looking to expand your networking skills, this video has got you covered!
Today’s topic: VLANs, Trunking, and Their Impact on LAN Switching
Today’s Interview Theme: Explains LAN Switching, Focusing on VLANs and Trunks
This video sets up a technical interview scenario with a set of questions. The questions revolve around LAN switching, as discussed in the video linked just below. Your job:
1. Watch this video until you understand the scenario.
2. Pause and answer for yourself.
3. Watch the rest of the video to hear what I would be hoping to hear from you in a technical interview.
• Terminology Mind Maps:...
This Review Video is Associated with This CCNA Content Video:
• Dive Deep into LAN Swi...
Video Vs. the Books
This video reviews the content in one section of the Cisco Press CCNA Cert Guides. In this case:
- Volume 1
- Chapter 8
- Section 1
Chapters
00:00 Introduction
00:16 Phase 1: Interview Questions
04:36 Phase 2: Review with a Colleague: Question 1
06:41 Phase 2: Review with a Colleague: Question 2
09:10 Phase 2: Review with a Colleague: Question 3
13:13 Phase 3: Follow-up Interview Questions
Links - New Books in 2024
Cisco Makes Minor Updates to the CCNA Blueprint (Version 1.1)
• Cisco Reveals CCNA 200...
Major Updates to the CCNA Books
• Minor CCNA Blueprint U...
Which Blueprint Should You Pursue? (2024)
• Which CCNA Blueprint S...
Product Links
Click the links below if you'd like me to earn a small affiliate sales commission if you buy anything from the publisher!
Ciscopress.com/NewCerts Page (News, Announcements):
click.linksyne...
Wendell’s Website Products page
www.certskills...

[@gus_leon]

Great review of VLANs, Trunking and LAN switching. This is really helpful for anyone going to a job interview. I like the thinking process you go through. Thank you, Wendell!

[@networkupskill]

Glad you enjoyed it!

[@gus_leon]

@@networkupskill Definitely, I enjoyed it!

[@alexilaiho8534]

Great review. I answered it correctly.

[@networkupskill]

Excellent!

[@soccers856]

Thank you. It is really good exercise. At 10:30 you said that ‘D1 will maintain the vlan trunking header as it sends the frame out’, so when i get home , i will try to adjust the exercise by connecting a pc10 to D1 in vlan2 and the received frame is flooded. Can the packet tracer shows me how switch D1 will send the flooded frame untagged to pc10 and then tagged to the trunk ?

[@networkupskill]

Thanks!
As for your question, yes. Look at Packet Tracer help and learn about Simulation mode. You can see a button for it in the lower right. Basically, you can, for instance, use the ping command in simulation mode and click through steps that show messages being forwarded by the various devices. You can click the messages and drill down on their contents, including seeing the 802.1Q header for messages that flow over trunks. It's a nice learning tool!

[@soccers856]

@@networkupskill The lab worked. I followed your instructions, and I was able to see both the tagged and the untagged frame leaving D1. I would like to share the 802.1Q fields that were in the lab, which are TPID: 0X8100, TCI: 0X0002, TYPE:0X1. Thank you, Wendell.

[@networkupskill]

@@soccers856 Sure! Then, for others who happen along, to connect the dots... It's shown as TCI, 4 hex digits, last 3 are the VLAN ID in hex, which is 002 in this case, which equals decimal 2, for VLAN ID 2 in decimal.