Anycast is a routing technique where a single IP address maps to multiple physical servers.
Anycast是一个IP地址映射多个物理主机的路由技术。
IP multicast technique realizes efficient data transmission from one point to multiple points in IP network, and remedies the defects of unicast and broadcast communication.
IP组播技术实现了IP网络中点到多点的高效数据传输， 它能弥补单播通信和广播通信的不足。
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