是否多播能在loopback接口上被接收，或者是否多播传送器在接收的数据上使用相同的NIC。
Whether multicast traffic can be received on the loopback interface, or whether the multicast transmitters are using the same NIC on which the data is being received.
多播是将同一信息从源节点传送到网络中多个目的节点。
Data packet is transmitted from source node to multiple destination nodes in multicast communication.
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。
The IP multicasting technology provides an effective transmission mode in which the same data is transmitted from one sender to a group of receivers.
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