8.2. Multicast Protocols
You've learned some of the reasons that multicast transmissions are good to use on the network. I have also taken care of the addressing woes of multicast. Now, let's go through the protocols that make multicast work. I start with Internet Group Multicast Protocol (IGMP), a host-to-router protocol. After that I go through a couple of protocols that allow a switch to make better forwarding decisions for multicast frames. Cisco Group Management Protocol and IGMP snooping. Finally, I will cover protocol-independent multicast, a router-to-router protocol that allows the routing of multicast traffic through the network.
8.2.1. Internet Group Management Protocol (IGMP)
Internet Group Management Protocol (IGMP) is a host-to-router ...