Youtube Channel

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Colin's site

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Thiago's site

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Cheat Sheets

Studying TCP / IP headers
I have been going through the CCIE Professional Developement books such as Routing TCP/IP Vol 1 and 2 as well as many others and extracted some of the headers, so I could easily look them up in a single file, rather than always looking for them all over online. A sample of the file looks as follows:

Learning/studying TCP / IP headers with the flashcardguy

The file can be downloaded here:

Understanding Cisco Port-Channel and Layer 2 load-balancing algorythm
I struggled to understand all the different load-balancing algorythm for a simple thing like a Cisco LAG or Port-Channel, finally it's infact quite interesting which algorithm should be avoided in which design! See for your self:

Cisco LAG / port-channel Layer 2 load-balancing algorythm

File found here: