A switch sends unicast packets to one destination port only.

• A. True
• B. False
• C. It forwards to all ports
• D. It forwards to the uplink only

Answer: (A)

Switches forward unicast frames to a single destination port by using a MAC address table. When a frame arrives, the switch notes the source MAC and the port it came from, learning where devices are located. For the frame’s destination MAC, the switch looks up which port that device is on; if it has a mapping, it sends the frame only out that specific port. If the destination MAC is unknown, the switch floods the frame to all ports in the same VLAN except the one it came from. This behavior means unicast frames are delivered to one specific destination port rather than being sent to every port. Only in the unknown-destination case does flooding occur, not for a known unicast destination.