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１组播技术概述组播（Multicast）又称为多播、多址广播、多地址广播和成组通信等，是相对于单播和广播方式而言的一种网络通信方式。IP组播技术作为IP网络中主机之间通信的一种模式，是通过组播地址寻址，向所有网络节点中某个确定子集（该子集被称为组播组）的成员发送数据包
I. Overview of Multicast Technology Multicast is also known as multicast, multicast, multicast and group communication. It is a network communication mode with respect to unicast and broadcast modes. As a mode of communication between hosts in an IP network, IP multicast technology sends data to a member of a certain determined subset in all network nodes (this subset is called a multicast group) through multicast address addressing package