Multicast MAC Address

multicast address is a logical identifier for a group of hosts in a computer network that is available to process datagram or frames intended to be multicast for a designated network service. The Datalink layer of the OSI model uses  multicast address. For IP multicasting, the authorities also reserved the multicast mac address range from 01-00-5E-00-00-00 to 01-00-5E-7F-FF-FF for Ethernet and Fiber Distributed Data Interface (FDDI) media access control (MACaddresses. The multicast MAC address is a special value that begins with 01-00-5E in hexadecimal. The remaining portion of the multicast MAC address is created; by converting the lower 23 bits of the IP multicast group address into 6 hexadecimal characters.

The range of IPv4 multicast addresses is 224.0.0.0 to 239.255.255.255. By the help of multicast addresses; a source device can send a packet to a group of devices that belong to a multicast group. These devices assign a multicast group of IP address. The source will always also be a unicast address.

The remote games also use multicast addresses, where many players connected remotely but playing the same game. Another use of the multicast address is in distance learning through video conferencing, where many students connected to the same class.

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