A switch will flood what type of unicast frame?

A switch will flood an unknown unicast frame. This type of frame is sent to a destination MAC address that the switch has not yet learned or does not have in its MAC address table. When a switch receives a frame, it examines the destination MAC address to determine where to forward it. If the destination address is not found in the MAC address table, the switch will flood the frame out of all ports except the one it was received on. This flooding ensures that the frame can reach its intended recipient, even if the switch does not yet know which port that recipient is connected to.

As a result, the switch relies on this flooding behavior to learn the correct port for future frames destined for that specific MAC address. Once the frame has been flooded and the destination device responds, the switch will learn its location and update the MAC address table accordingly, thus avoiding future flooding for known unicast frames.

The other types of frames mentioned—known unicast, broadcast, and multicast—are handled differently by switches. Known unicast frames are sent directly to the specific port associated with the destination MAC address, while broadcast frames are sent to all ports on the network segment. Multicast frames are also sent to a specific group of devices and may be treated