Final answer:
The statement is False. A switch forwards a frame out to all ports except the port through which it arrived when the destination MAC address is not known.
Step-by-step explanation:
The statement given is False.
When a switch receives a frame, it checks the destination MAC address in the frame's header to determine where to send the frame. If the destination MAC address is not found in the MAC address table, the switch forwards the frame out to all ports except the port through which the frame arrived. This process is known as flooding.
Once the switch receives a reply from the device with the correct MAC address, it updates its MAC address table with the source MAC address of the reply. This helps the switch remember where to send future frames to that particular device.