After all PCs in a network have communicated, which interface will switch D populate in its MAC FDB for PC1?

In the context of a switch's MAC Forwarding Database (FDB), the entries are populated based on the source MAC address of the devices connected to the switch, as well as the specific interfaces they utilize to communicate.

When PC1 communicates with other devices on the network, the switch learns which interface the MAC address of PC1 is associated with by examining the source MAC address of the frames sent from PC1. The switch records this information in its MAC FDB. As a result, when PC1 sends traffic over the network and the switch processes these packets, the switch will note which specific interface (such as 1/1/4) the packets are coming from.

In this case, if the interface that PC1 communicated through is marked as 1/1/4, the switch will populate its MAC FDB with the mapping of PC1's MAC address to that specific interface. This enables efficient forwarding of frames to PC1 for future communications.

Understanding how switches populate their MAC FDB is essential for network troubleshooting and optimization, as it helps ensure data reaches the correct destination efficiently. The choice indicating interface 1/1/4 reflects the accurate association of PC1's MAC address with the appropriate port on the switch, providing the necessary