What is stored to maintain information about the MAC addresses available on a switch port?

The information about the MAC addresses available on a switch port is stored in the Content Addressable Memory (CAM) Table. This table is crucial for the operation of a switch, as it helps in making forwarding decisions for incoming frames. When a switch receives a frame, it examines the source MAC address and logs it in the CAM table along with the corresponding switch port. This process allows the switch to learn which devices are connected to which ports and ensures that network traffic is efficiently directed only to the appropriate ports.

The CAM table also plays a significant role in reducing unnecessary traffic on the network. By keeping track of the MAC addresses and their associated ports, the switch can send frames only to the intended recipient, rather than flooding all ports. This functionality is essential for network efficiency and performance.