200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ261

Network Fundamentals

How does MAC learning operate?

  • A sends the frame back to the source to verify availably
  • B rewrites the source and destination MAC address
  • C drops received MAC addresses not listed in the address table
  • D adds unknown source MAC addresses to the CAM table
Explanation

MAC learning is the process by which a switch reads the source MAC address of a received frame and stores that address, associated with the ingress port, in the CAM/MAC address table. This allows the switch to make forwarding decisions for future traffic destined to that MAC address.

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