A switch receives a unicast Ethernet frame whose destination MAC address is unknown in its MAC table. It normally?

  • AFloods the frame out appropriate ports in the same VLAN except the incoming port
  • BDrops every such frame immediately
  • CSends it only to the default gateway
  • DConverts it into an IP broadcast
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Correct Answer: A. Floods the frame out appropriate ports in the same VLAN except the incoming port
Explanation: Unknown unicast traffic is normally flooded within the relevant VLAN until the destination location is learned.
Reference: Standard computer and networking fundamentals: ethernet switching