Multicast Protocols Overview
IP Version 4 (IPv4) has three fundamental types of addresses: unicast, broadcast, and multicast. A unicast address is used to send a packet to a single destination. A broadcast address is used to send a datagram to an entire subnetwork. A multicast address is used to send a datagram to a set of hosts that can be on different subnetworks and that are configured as members of a multicast group.
A multicast datagram is delivered to destination group members with the same best-effort reliability as a standard unicast IP datagram. This means that multicast datagrams are not guaranteed to reach all members of a group or to arrive in the same order in which they were transmitted. The only difference between a multicast IP ...
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