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A network administrator tries to assign the MAC address 00:1A:2B:3C:4D to a device but it fails. Why?

medium📝 Analysis Q7 of 15
Computer Networks - Physical and Data Link Layer
A network administrator tries to assign the MAC address 00:1A:2B:3C:4D to a device but it fails. Why?
AMAC address must have 6 pairs of hexadecimal digits
BMAC addresses cannot contain numbers
CMAC addresses must be assigned by the router
DMAC addresses must be in decimal format
Step-by-Step Solution
Solution:

  1. Step 1: Check MAC address length

    A valid MAC address has 6 pairs (12 hex digits). The given address has only 5 pairs.

  2. Step 2: Confirm format rules

    MAC addresses contain hexadecimal digits and are assigned by device manufacturers, not routers.

  3. Final Answer:

    MAC address must have 6 pairs of hexadecimal digits -> Option A

  4. Quick Check:

    MAC address length = 6 hex pairs [OK]
Quick Trick: MAC addresses always have 6 hex pairs [OK]
Common Mistakes:
MISTAKES
  • Thinking MAC addresses can have fewer pairs
  • Believing routers assign MAC addresses
  • Confusing decimal with hexadecimal format

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