How are entries added to the MAC Address-Table?

Entries are added to the MAC Address Table primarily by associating the ingress port with the source MAC address of received frames. When a switch receives a frame on a particular port, it examines the source MAC address found in that frame. The switch then creates a mapping in its MAC Address Table that associates the source MAC address with the port it was received on. This process allows the switch to effectively forward frames to the appropriate destinations in the network based on this learned information, making the switching process more efficient.

The learning process is dynamic, meaning that as devices communicate over the network, the MAC Address Table is continuously updated with new MAC addresses as they appear at different ports. This functionality is crucial for maintaining optimal performance and ensuring accurate delivery of frames within a local area network.

Other methods listed do not reflect the standard operational procedures a switch uses to populate its MAC Address Table. Manual entry might be used for static entries, but it is less common in dynamically fluctuating environments. Network scanning and periodic updates from servers do not align with the real-time learning mechanism that switches utilize.