This section briefly covers the IP multicast areas of interest for the CCIE written test.
The multicasting protocol was designed to reduce the high bandwidth requirements of technologies, such as video on demand, to a single stream of information to more than one device. Applications include electronic learning, company share meetings (video on demand), and software distribution.
Multicasting can be defined as unicast (one to one), multicast (one to many), and broadcast (one to all).
Multicasting transmits IP packets from a single source to multiple destinations. The network copies single packets, which are sent to a subset of network devices. In IPv4, the Class D addresses ranging from 184.108.40.206 to 220.127.116.11 are reserved for ...