Summary TCP/IP fundamentals, the OSI model, TCP vs UDP, application protocols, IP addressing, NAT, and an overview of proxy servers. Reference Materials Guide to Network Defense and Countermeasures - Chapter 1 (pgs. 1-16) Additional Information http://www.yale.edu/pclt/COMM/TCPIP.HTM http://technet.microsoft.com/en-us/library/bb726991.aspx