The address range is divided into blocks each assigned a specific purpose or behavior.
[2] The following table is a list of notable well-known IPv4 addresses that are reserved for IP multicasting and that are registered with the Internet Assigned Numbers Authority (IANA).
In addition, the scope field is used to identify special multicast addresses, like solicited node.
The group ID field may be further divided for special multicast address types.
The following table is a list notable IPv6 multicast addresses that are registered with IANA.
Modern Ethernet controllers filter received packets to reduce CPU load, by looking up the hash of a multicast destination address in a table, initialized by software, which controls whether a multicast packet is dropped or fully received.
Cisco Systems 802.11 wireless networks use the same MAC addresses for multicast as Ethernet.