Unlike broadcasting, multicasting only forwards to those addresses who have explicitly registered interest in the data.
不同广播是，多播仅仅发送给那些明确地登记的而且对数据的兴趣的地址。
IP multicasting is a set of technologies that enables efficient delivery of data to many locations on a network.
IP多信道广播是使数据向网络中许多位置高效传送的一组技术。
The IP multicasting technology provides an effective transmission mode in which the same data is transmitted from one sender to a group of receivers.
IP多播技术提供一个发送者向一组接收者传送相同数据的传输方式。
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