顾名思义，这个协议是在ip多播之上构建的；在ip多播中，一个发送器可以发送一条消息并使多个接收器接收到该消息。

As the name implies, it is built on top of IP multicast, in which one transmitter can send one message and have it be received by more than one receiver.

youdao

顾名思义，这个协议是在ip多播之上构建的；在ip多播中，一个发送器可以发送一条消息并使多个接收器接收到该消息。

As the name implies, it is built on top of IP multicast, in which one transmitter can send one message and have it be received by more than one receiver.

youdao