Class D Address

Very first four bits of the first octet in Class D IP addresses are set to 1110, giving a
range of:
Class D has IP address rage from 224.0.0.0 to 239.255.255.255. Class D is reserved for
Multicasting. In multicasting data is not destined for a particular host, that is why there
is no need to extract host address from the IP address, and Class D does not have any
subnet mask.

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