This quck question and answer comes from a recent forum thread at networking-forum.com.  I especially like how texanmutt tried sending traffic to the proxy server.  This very clearly illustrates the idea of same-security-traffic permit intra-interface.
Question: I have setup remote access VPN on an ASA 5505. The remote access works good, but when I try [...]

I saw an issue today that was very strange at first. I had a Cisco router with site to site VPN configured directly connected to a cable modem. Every so often (5 to 10 minutes) there was a drop in connectvity and then the connection would come back up. Never once saw a error or [...]

One of the first items under “General Networking” on the CCIE Written Exam blueprint is “OSI Layers”.  Chances are, if you’re studying for the CCIE you know your OSI layers.  That said, it can’t hurt to revisit them when you’re just getting ramped up for the written test, or if you haven’t thought about them [...]