A network administrator is trying to locate the switch interface a PC is connected to. The administrator accesses the local switch, pings the PC IP address, and then uses the command show arp. Which…

`show route` displays the routing table, which is used for forwarding packets between networks and does not help locate a device's physical connection on a local switch.

After obtaining the PC's MAC address from the `show arp` command, the `show mac-address-table` (or `show mac address-table`) command on the switch is used to query the switch's MAC address table. This table maps MAC addresses to the specific physical port where the switch learned that MAC address, thereby pinpointing the PC's connection point.

`show vlan` displays VLAN information, which is relevant for logical segmentation but does not directly map a MAC address to a specific physical port.

`show interface` displays details about all interfaces, but without knowing the specific interface, it is not an efficient way to locate a PC among many ports on a switch.