ion::::其他实现.遵从Winsock规范的TCP/IP与UDP/IP协议栈有：3Com, Beame & Whiteside, DEC, Distinct, FTP Software, Frontier, IBM, Microdyne, ,Novell, Sun Microsystems, Trumpet Software International.
例子.
优雅关闭.TCP连接的关闭过程有两种：调用 close()/closesocket()