Which command should you apply to an interface to configure it as an access port after disabling DTP?

To configure an interface as an access port after disabling Dynamic Trunking Protocol (DTP), the appropriate command is to set the interface mode to access. This command makes it clear that the interface will only participate in VLAN tagging for a single VLAN, and it will not attempt to negotiate trunking with other switches, ensuring a straightforward configuration.

Disabling DTP is crucial in scenarios where you want to enforce consistent access port settings across your network devices without allowing automatic negotiations that could introduce configuration issues or vulnerabilities. By explicitly using the command that sets the interface to access mode, you are actively defining its role within the VLAN structure.

The other options relate to different functionalities. The command related to trunking mode would configure the interface to potentially carry traffic from multiple VLANs, which is not suitable after disabling DTP if you are solely intending to configure access mode. The command for nonegotiate is useful in other contexts but does not configure the port as an access port directly; instead, it is used in conjunction with trunk configurations. Lastly, specifying an access VLAN is indeed important, but it must follow a command that first designates the interface as an access port. Therefore, setting the mode directly to access is the correct approach in this scenario.