A handbook on how to design optimal IP addressing schemes that take into account network growth, address utilization, routing efficiency and ease of administration. Written for networking professionals who are responsible for designing or maintaining a TCP/IP network, this text covers such topics as: host versus network addressing; special case addressing; efficiency and optimization; IP address subnetting; and Classless Interdomain Routing. It also provides tutorials to help explain these concepts. The book features the Windows-compatible address visualizing tool available on APPNET, and provides coverage of Ipv6, with recommendations for migrating to Ipv6 addresses.