What addressing information is recorded by a switch to build its MAC address table?the source Layer 2 address of incoming framesthe destination Layer 3 address of incoming packetsthe destination Layer 2 address of outgoing framesthe source Layer 3 address of outgoing packets

A switch builds its MAC address table using the source Layer 2 address of incoming frames. Here's a step-by-step explanation:

1. When a frame arrives at a switch port, the switch examines the source MAC address and compares it to its MAC address table.

2. If the source MAC address is not in the switch's table, the switch will add it along with the incoming port number to the table.

3. If the source MAC address is already in the table but on a different port, the switch updates the port number.

4. If the source MAC address is already in the table and on the same port, the switch does nothing.

The switch does not record the destination Layer 2 address of outgoing frames, the destination Layer 3 address of incoming packets, or the source Layer 3 address of outgoing packets in its MAC address table. The MAC address table is strictly a Layer 2 function and does not involve Layer 3 IP addresses.