在第四部分中，重点介绍了多点单播子系统的设计与实现过程，并对实现中所使用的关键技术进行了探讨。
In the fourth part, the design, the developing process and the key techniques adopted in the development of this subsystem are introduced.
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。
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。
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.
应用推荐