Chapter 12 Multicasting and Multicast Routing Protocolsn nIntroductionn nMulticast addresses and IGMPn nMulticast routingn nMulticast routing protocoln nMBONE1 112.1 Introductionn nIP IP UnicastingUnicasting，IPIP单播通信单播通信单播通信单播通信n nOne source One source One destination in the InternetOne destination in the Internet unicastunicast unicastunicast address address addressaddressn nIP MulticastingIP Multicasting，IPIP多播通信多播通信多播通信多播通信n nOne source One source A group of destinations in the Internet A gro
