Which statement best describes how a switch uses the MAC address table after learning?

• A. It maps MAC addresses to interface ports to enable frame forwarding.
• B. It maps IP addresses to host names.
• C. It stores VLAN configurations.
• D. It records the maximum allowed number of devices.

Answer: (A)

Switches learn where devices are by watching the source MAC address on frames as they arrive, and they record that MAC address with the port (and VLAN) it came in on. That creates a MAC address table that maps each MAC to a specific switch port. When a frame needs to be forwarded, the switch looks up the destination MAC in that table to decide which port to send the frame out of. If the destination isn’t known yet, the switch floods the frame to all ports in the same VLAN so the destination can respond and be learned. This dynamic learning and per-port mapping is what lets frames be forwarded efficiently without broadcasting everywhere.

Other options don’t fit because mapping IP addresses to host names is DNS, storing VLAN configurations is a separate configuration database, and recording the maximum number of devices isn’t handled by the MAC address table.