Which of these is a valid MAC address?0.5 MarksB9:DA:00:12:78:34:09:EE:D2(C) A698::0976:AD5B:F78A(D) AA:6F:7A:BB:C3:9DA6:8G:GE:12:C6:89AA:6F:7A:BB:C3:9DA698::0976:AD5B:F78A

The valid MAC address from the given options is B9:DA:00:12:78:34.

A MAC address is a unique identifier assigned to network interfaces for communications on the physical network segment. It is a 48-bit number (12 hexadecimal characters). They can appear in six groups of two hexadecimal digits separated by colons (:), or in the form of twelve hexadecimal digits separated by hyphens (-).

Here's why the other options are not valid:

• 09:EE:D2: This is not a valid MAC address because it only has 6 hexadecimal characters. A valid MAC address should have 12 hexadecimal characters.

• A698::0976:AD5B:F78A: This is not a valid MAC address. It appears to be an IPv6 address, which is a type of IP address, not a MAC address.

• AA:6F:7A:BB:C3:9DA6:8G:GE:12:C6:89: This is not a valid MAC address because it has more than 12 hexadecimal characters. Also, it contains the letter 'G', which is not a valid hexadecimal character.

• AA:6F:7A:BB:C3:9D: This is a valid MAC address, but it is not one of the options in the question.

So, the only valid MAC address in the options is B9:DA:00:12:78:34.