A switch receives a frame with a destination MAC address that is currently not in the MAC table What action does the switch perform?

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1205618

2026-04-18 07:35

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It duplicates the frame to all Ethernet ports, except the port it came from.

A switch's MAC table is built not from destination addresses it receives, but by the source MAC addresses. So the frame is broadcast throughout the broadcast domain, until the end device with a matching MAC address responds to the broadcast, thus giving the switch a new source address to add to its MAC table.

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