If a device moves to a different switch port, how does the switch CAM table reflect this?

• A. It updates the CAM entry to the new port as frames from that MAC are observed on the new port.
• B. It deletes the CAM entry and stops forwarding.
• C. It locks the CAM entry to the first port forever.
• D. It broadcasts frames to all ports for every frame.

Answer: (A)

The switch learns where a device is by watching the source MAC address on frames. When that device moves and starts sending frames on a different port, the switch sees its MAC on the new port and updates the CAM entry to reflect that port. This keeps forwarding efficient, because subsequent frames to that MAC are sent only to the new port. The entry isn’t locked to the original port; it ages out and can be updated as traffic from that MAC reappears on different ports.