Group communication based on IP-multicast technology will be an important part of packet switch networks.
采用IP组播技术的群组通信将是包交换通信网络中非常重要的一类应用。
Since multicast may have many receivers, for effective transmission, the router needs a tree to join multiple IP members, with Multicast RIP and its data packet forwarding function.
多点广播的接收方可能很多，为了有效地进行传输，路由器要构造一个连接IP多点广播组所有成员的树，采用多点广播路由选择协议并启用多点广播数据包转发功能。
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