200-301: Cisco Certified Network AssociateDemo

MAC learning is a standard Layer 2 switching function where switches learn source MAC addresses from incoming frames and build a MAC address table for forwarding decisions. This capability is enabled by default on all VLANs and interfaces in Cisco switches unless explicitly disabled. The process populates the MAC address table (not the ARP table, which is Layer 3), allowing the switch to forward frames based on learned source-to-port mappings.