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上传日期：2006-04-23 14:35:04
说明： 广播和多播仅应用于UDP，它们对需将报文同时传往多个接收者的应用来说十分重要。TCP是一个面向连接的协议，它意味着分别运行于两主机（由IP地址确定）内的两进程（由端口号确定）间存在一条连接。
(broadcast and multicast only used UDP. they need to be reported- the same time as the recipient of several important applications. TCP is a connection-oriented agreement, it means that operate in the two host (determined by IP address) within the two processes (identified by port number) between a company then.)
