When a switch receives a frame destined for a MAC address already in its CAM table, how is the frame handled?

When a switch receives a frame with a destination MAC address that is already present in its Content Addressable Memory (CAM) table, the switch performs a unicast forwarding action. It looks up the MAC address in its CAM table, which maps MAC addresses to specific switch ports. The frame is then sent out only through the port associated with that destination MAC address. This process is known as "known unicast" and is fundamental to how switches efficiently forward traffic within a local area network (LAN), preventing unnecessary traffic on other ports. Incorrect options: Flooding to all ports (except the originating one) occurs only when the destination MAC address is not found in the CAM table (an unknown unicast). Forwarding to the first available port is not how switches operate; they use MAC address-to-port mappings. Broadcasting to all ports is reserved for broadcast frames (destination MAC FF:FF:FF:FF:FF:FF) or unknown unicast frames, not for known unicast frames.