I remember back in the days when I was studying my CCNA certification subnetting was a pain in the ass topic for me. Until I realized its all about counting zero's and one's, and it's all binary so powers of two. Really there is so much written about subnetting, but you can really summarize it in about 7 simple formula's.
Check out my blog about how I simplified subnetting in one page!
[toc:faq] Session 1: LAN Switching - Technical Services Virtual Boot
Camp Session Presentation - Troubleshooting and Upgradation on Cisco LAN
switches.pptx Video - Troubleshooting and Upgradation on Cisco LAN
switches Q&A from Troubleshooting and Upgradat...
What do you do if you think you're running into a bug? Cisco makes it
possible for you to report bugs yourself. Learn how, and find out how
your contributions help us improve our software.Cisco publishes its
bugs. Before opening a TAC Support Case, use Bu...
Cisco Licensing is pleased to announce the new Licensing Portal. It
provides customers with an enhanced self-service experience by
stream-lining and automating many licensing activities. Please take a
moment to familiarize yourself with the features that ...