A switch receives a frame from a host on the network. The source MAC address on the frame is not listed in the MAC address table, but the destination MAC address is. What happens with the frame?
A)The frame is discarded.
B)The frame is broadcast to all other ports on the network.
C)The switch adds the source MAC address and the port to the MAC address table and sends the frame to the destination address.
D)The frame is sent back to the source MAC address.

Question

Quizplus · Accepted Answer

When a switch receives a frame that has a destination MAC address but not the source MAC address, it updates the MAC address table with the source MAC address.
Key Takeaway: When a switch receives a frame, it first checks if the destination address is present in its MAC table. If it is a direct route, the frame is passed to the destination host. If it is a linked route through another switch or a router, the frame is sent to the appropriate device. In case the switch does not find the source MAC address, it forwards the frame to the next link and adds the MAC information of the source in its MAC table.

A Switch Receives a Frame from a Host on the Network