Switch's MAC Address Table Information
What information does a switch use to keep the MAC address table information current?
a) the source MAC address and the incoming port
b) the source and destination MAC addresses and the incoming port
c) the source and destination MAC addresses and the outgoing port
d) the destination MAC address and the incoming port
e) the source MAC address and the outgoing port
Answer:
A switch uses "the source MAC address and the outgoing port" to keep the MAC address table information current. The correct option is (e).
When a switch receives a frame from a device, it checks the source MAC address of the frame and records it in its MAC address table along with the outgoing port. The switch then uses this information to forward frames to the correct destination device. As frames are sent between devices, the switch updates its MAC address table to ensure that it has the most current information about which MAC addresses are associated with which ports. If a device is removed from the network, the switch will eventually remove its MAC address from the table as it stops receiving frames from that device.
By keeping the MAC address table current, switches can efficiently and accurately forward frames to their intended destination, reducing network congestion and ensuring that devices can communicate with each other effectively.
Therefore, the correct answer is option (e).