What does a switch do if it doesn't find the destination MAC address in its switching table?
A) Sends and error to the sending device
B) Discards the frame
C) Sends an ARP to learn the MAC address
D) It forwards the frame to all ports

Question

Quizplus · Accepted Answer

If a switch doesn't find the destination MAC address in its switching table, it forwards the frame to all ports except the one it was received on, a process known as flooding.

What Does a Switch Do If It Doesn't Find the Destination