What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?

IT Questions BankWhat will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table? 1ITExamAnswers Staff asked 10 months ago

Question:
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?

  • Drop the frame.
  • Send the frame to the default gateway address.
  • Use ARP to resolve the port that is related to the frame.
  • Forward the frame out all ports except the port where the frame is received.

Explanation: A LAN switch populates the MAC address table based on source MAC addresses. When a switch receives an incoming frame with a destination MAC address that is not listed in the MAC address table, the switch forwards the frame out all ports except for the ingress port of the frame. When the destination device responds, the switch adds the source MAC address and the port on which it was received to the MAC address table.

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