A "Must have" quick reference for IT/Networking professionals and students who are learning and using TCP/IP; Comprehensive Protocol Map focus on TCP/IP protocol suite and key layer 1 and 2 LAN, WAN an MAN protocols; Detailed explanations of IPv4 and IPv6; IPv4 and IPv6 addressing schemes; IPv4 and Ipv6 comparison; TCP and UDP explanations and header structures; Descriptions of commonly used TCP/IP utilities such as ICMP, TCPdump and Ping