Which of the following is not a valid multicast MAC address?
2014
Which of the following is not a valid multicast MAC address?
- A.
01:00:5E:00:00:00
- B.
01:00:5E:00:00:FF
- C.
01:00:5E:00:FF:FF
- D.
01:00:5E:FF:FF:FF
Attempted by 214 students.
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Correct answer: D
Multicast MAC addresses begin with 01:00:5E. The fourth byte's most significant bit must be 0, limiting the value to 0x00–0x7F. Option D uses FF for the fourth byte, violating this constraint.
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