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众所周知,TCP/IP协议主要是为了实现点对点通讯设计的,从一台服务器送出的每个数据包只能传送给一个客户机。如果有另外1000个用户希望顺路获得这个数据包的拷贝是做不到的。现在的Internet工作方式要求1000个用户中的每个用户必须分别对信息源服务器发送单独的查询,而信息源服务器必须向每个用户发送他们自己申请的数据包拷贝。这种巨大冗余的代价首先在于等待负担过于沉重的服务器响应需要耗费很长时间,其次是管理人员被迫购买本来不必要的硬件和带宽来保证一定的服
As we all know, TCP / IP protocol is mainly designed to achieve point-to-point communications, sent from a server can only send each packet to a client. If there are 1000 other users want to get along the way this copy of the packet can not be done. Today’s Internet work requires that each of the 1000 users have to send a separate query to the source server separately, and the source server must send each user a copy of their own requested packet. The cost of such a huge redundancy first lies in waiting for overloaded server response takes a long time, followed by managers were forced to buy the hardware and bandwidth would otherwise be necessary to ensure a certain service