What is a valid multicast MAC address?
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A. B. C. D.C
A multicast MAC address is used to identify a group of network devices that belong to a multicast group. When a device wants to send a packet to a multicast group, it sends the packet to the multicast MAC address, and all the devices that have joined the group receive the packet.
Out of the given options, the only valid multicast MAC address is C. 01:00:5e:28:12:95.
Explanation of each option:
A. 00:90:69:9f:ea:46 - This is a unicast MAC address, not a multicast MAC address. It is used to identify a single network device.
B. ff:ff:ff:ff:ff:ff - This is a broadcast MAC address, not a multicast MAC address. It is used to send a packet to all devices on the network.
C. 01:00:5e:28:12:95 - This is a valid multicast MAC address. The first octet (01) indicates that it is a multicast MAC address, and the last 23 bits (00:5e:28:12:95) are used to identify the multicast group.
D. 99:99:99:99:99:99 - This is an invalid MAC address. MAC addresses are only valid if they consist of 48 bits and are unique to each network device. This MAC address is not unique and is not assigned to any device.
In summary, the only valid multicast MAC address from the given options is C. 01:00:5e:28:12:95.