RFC 2292: Advanced Sockets API for IPv6 - Defines some the advanced features of the sockets API that are required for applications to take advantage of additional features of IPv6. WinSock Development Information - Sample programs, technical articles, links, and a WinSock error reference. (Bob Quinn) FreeBSD: Sockets - FreeBSD Developers' Handbook chapter about using sockets Windows Sockets Programming - Links to get started with WinSock programming. (Ed Snible) TCP/IP Raw Sockets - MSDN documentation about Raw Socket specification. Raw sockets can be used to create your own protocols. Windows Sockets 2 - Developer documentation of Winsock for all Windows platforms.