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前言众所周知,普通IP通信是在一个发送者和一个接收者之间进行的,我们常把它称为点对点的通信,但对于有些应用,这种点对点的通信模式不能有效地满足实际应用的需求。例如:一个数字电话会议系统由多个会场组成,当在其中一个会场的参会人发言时,要求其它会场都能即时的得到此发言的内容,这是一个典型的一对多的通信应用,通常把这种一对多的通信称为多播通信。采用多播通信技术,不仅可以实现一个发送者和多个接收者之间进行通信的功能,而且可
Preface As we all know, ordinary IP communication is carried out between a sender and a receiver, we often call it peer-to-peer communication, but for some applications, this peer-to-peer communication mode can not effectively meet the needs of practical applications. For example, a digital teleconferencing system is composed of multiple conference sites. When speaking to participants in one conference venue, other conference sites are required to obtain the content of the conference immediately. This is a typical one-to-many communication application, This one-to-many communication is often referred to as multicast communication. The use of multicast communication technology, not only to achieve a sender and multiple receivers to communicate between the functions, but also