200-301: Cisco Certified Network AssociateDemo

By Cisco · Question Mode

QuestionQ139

Network Fundamentals

What does a switch look up in the CAM table when it forwards a frame?

  • A source MAC address and aging time
  • B destination MAC address and flush time
  • C source MAC address and source port
  • D destination MAC address and destination port
Explanation

A switch forwards a frame by checking the destination MAC address in its CAM (MAC address) table and using the matching port entry to send the frame out the correct interface. The source MAC address is used for learning, not for the forwarding lookup, and timer values such as aging or flush time are not the forwarding search criteria.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!