http://www.networksorcery.com/enp/Protocol.htm http://www.networksorcery.com/enp/Protocol.htm has a bunch of network diagrams for various protocols. This websi

http://www.networksorcery.com/enp/Protocol.htm http://www.networksorcery.com/enp/Protocol.htm has a bunch of network diagrams for various protocols. This website lays things out really nicely, would love to have more protocols :)