Covers the key conceptual and practical aspects of networking and security, which are increasingly important in the era of the Internet, Windows, and Unix. TCP/IP communications protocols are explored at multiple levels of the protocol stack. Performance and reliability issues are also studied, using campus Intranet and Internet connections as well as protocol analyzer and network management tools. Security topics include encryption, authentication, and the likely change from clear-text to Kereberos-type tools. Also offered as NME 3650.