A special IP address range that serves as the destination for multicast communication.
A dedicated address range used as the destination for multicast delivery (224.0.0.0/4 in IPv4). Within that range, 224.0.0.0 through 224.0.0.255 is reserved for local-network-only uses such as OSPF's own multicast addresses, while the rest of the range is routable and available for general group addresses.
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