What action does an Ethernet switch take when it receives a frame with an unknown Layer 2 source address?

What action does an Ethernet switch take when it receives a frame with an unknown Layer 2 source address?

• It forwards the frame out all interfaces except the interface on which it was received.
• It forwards the frame to the default gateway.
• It records the source address in the address table of the switch.
• It drops the frame.

Explanation: When an Ethernet switch receives a frame with an unknown Layer 2 address, the switch records that address in the address table.

Exam with this question: Modules 11 - 12: Network Infrastructure Security Group Exam