Multicast Addressing

•The Internet Assigned Number Authority (IANA) assigned the IP Class D address space 224.0.0.0/4 for multicast addressing. It includes addresses ranging from 224.0.0.0 to 239.255.255.255. •The first 4 bits of this whole range start with 1110.

Multicast Addressing Class D Addressing

Out of the multicast blocks mentioned in Table 13-2, the most important are discussed in the list that follows:

•Local network control block (224.0.0/24) – Addresses in the local network control block are used for protocol control traffic that is not forwarded out a broadcast domain.

•Internetwork control block (224.0.1.0/24) – Addresses in the internetwork control block are used for protocol control traffic that may be forwarded through the Internet.

IP Multicast Addresses Assigned by IANA

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