An IP (Internet protocol) address is a unique numeric identifier for a computer or other device on a TCP/IP (transmission control protocol/Internet protocol) network. A multicast is a single stream of data (i.e., a set of packets) that is transmitted simultaneously to selected multiple hosts which have joined the multicast group. A host is a computer that is connected to the network.
Officially designated multicast addresses range from 18.104.22.168 to 22.214.171.124. Some, termed well-known addresses, have been designated for specific uses. For example, 126.96.36.199 is the address for transmitting to all hosts in the multicasting group, and 188.8.131.52 is the multicasting address for all routers on the subnet (i.e., logical division of a network). OSPF (open shortest path first), an interior gateway protocol (IGP), uses 184.108.40.206 and 220.127.116.11 to send OSPF routing information to all OSPF routers on a network segment, and RIP (routing information protocol), another IGP, uses 18.104.22.168 to send routing information to all RIPv2 routers on a network segment.
Created November 23, 2005.