I added a new link to Packetlife.net, which is a really amazing website about networking, with focus on Cisco stuff.
The work that the author made is truly impressive : blog, cheat sheets, gentle forum and even a lab (I haven’t test because I don’t need it, but if you are a student, it is great for students and so far I have never seen any other website offering it), all integrated with a quality level that is rare to find even on professional website.
This is one the best website I have never seen in all categories and certainly the best about Cisco networking. If you are interested in this topic, visit there right now.