DataPort: the destination port that is used in combination with the multicast group address; this defaults to 34343.
dataPort：用于结合多播组地址的目标端口，默认是34343。
It's an efficient way to deliver IP data package from one source to more destination, send the copy of information to a group of address, to all the recipients at the same time.
IP组播是面向组接收者的有效数据通信方式，利用一种协议将IP数据包从一个源传送到多个目的地，将信息的拷贝发送到一组地址，到达所有想要接收它的接收者处。
Then, the request with this anycast address as the destination is forwarded to the group member through a direct mode or a tunneling mode.
再由该分区内的路由器将目标地址为该选播地址的请求以直接方式或者隧道方式转发到这个组成员。
Then, the request with this anycast address as the destination is forwarded to the group member through a direct mode or a tunneling mode.
再由该分区内的路由器将目标地址为该选播地址的请求以直接方式或者隧道方式转发到这个组成员。
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