Hello friends,

I've seen a lot of Subnetting questions come up on this forum lately... and understandably so! Subnetting is the first major hurdle for many CCNA candidates.

About a year ago I published a set of videos that are meant to take you from no proficiency in Subnetting to being a Subnetting Master. I titled the video series the "Subnetting Mastery" series. I'd like to share the video series with you.

If you are studying Subnetting, I earnestly believe that this is the last video series you will ever have to watch.

Subnetting Mastery

Video 1: What is Subnetting?

Video 2: Drawing the Subnetting Cheat Sheet

Video 3: Using the Cheat Sheet

Video 4: Practice Examples

Video 5: Time-Saving Tricks

Video 6: Subnetting in the /17-/24 range

Video 7: Subnetting in the /1-/16 range

FLSM and VLSM Appendix - Part 1

FLSM and VLSM Appendix - Part 2

In total, the video series provides about 60 minutes of content. I would suggest taking a 15 minute break after Video 4 to practice solving problems on your own at SubnetIPv4.com. And then another 15 minute break after Video 7 for more practice.

If you do that, then I sincerely believe you'll be at a point where solving Subnetting questions comes very naturally to you.

If you don't get to that point, I want to know about it. Please DM me or reply to this post to let me know what you feel this video series was missing.

Hope it helps.

Edit: Series has been updated to include the following additional videos:

Video 10: Supernetting, IP Aggregation, and IP Summarization

Video 11: Solving VLSM problems using only Scratch paper