Which of the following is a multicast MAC address?

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Multiple Choice

Which of the following is a multicast MAC address?

Explanation:
Multicast MAC addresses are used to deliver frames to a group of devices, not to a single host. At the Ethernet level, a multicast address is identified by the least significant bit of the first octet being 1. The classic IPv4 multicast MAC prefix is 01-00-5E, so addresses that begin with 01-00-5E are multicast. For example, 01-00-5E-00-00-03 corresponds to a multicast group. The other options illustrate other common cases: FF-FF-FF-FF-FF-FF is a broadcast address, meaning it goes to all devices on the LAN, not just a multicast group. Addresses starting with 5C or 00 have a first octet whose least significant bit is 0, so they are unicast addresses assigned to individual NICs, not multicast groups.

Multicast MAC addresses are used to deliver frames to a group of devices, not to a single host. At the Ethernet level, a multicast address is identified by the least significant bit of the first octet being 1. The classic IPv4 multicast MAC prefix is 01-00-5E, so addresses that begin with 01-00-5E are multicast. For example, 01-00-5E-00-00-03 corresponds to a multicast group.

The other options illustrate other common cases: FF-FF-FF-FF-FF-FF is a broadcast address, meaning it goes to all devices on the LAN, not just a multicast group. Addresses starting with 5C or 00 have a first octet whose least significant bit is 0, so they are unicast addresses assigned to individual NICs, not multicast groups.

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