What does a switch search for in the CAM table when forwarding a frame?

The source MAC address and aging time are used by the switch to *learn* entries and manage the CAM table, not for making forwarding decisions for an incoming frame.

While the destination MAC address is key, 'flush time' is not a standard term related to forwarding; aging time is used for entry expiration.

The source MAC address and source port are used to populate the CAM table (learning phase), mapping the MAC address of the sender to the port it was received on, rather than for forwarding an incoming frame to its destination.

Upon receiving a frame, a switch extracts the destination MAC address and queries its CAM (Content Addressable Memory) table to find the corresponding destination port, which is the interface through which the frame should be forwarded.