Which command would you use to delete VLAN configuration details from a Cisco switch?

To delete VLAN configuration details from a Cisco switch, the command to use is to delete the vlan.dat file. The vlan.dat file is where VLAN configurations are stored within the switch's flash memory. By removing this file, you effectively erase all VLAN configurations, which can include VLAN IDs, names, and other related settings.

Using the specific command to delete vlan.dat ensures that you're targeting the correct file that contains the VLAN information rather than using a more generic command that doesn't specifically address VLAN configurations. This method is essential during network management and troubleshooting when you need to reset the VLAN configuration on a switch completely.

Other options like clear vlan and remove vlan do not correspond to any valid commands within Cisco's IOS for managing VLAN configurations. Similarly, delete configuration does not specifically address VLAN data and could imply a broader impact on the device’s configuration. Thus, focusing on the vlan.dat file is the precise method to clear VLAN settings effectively.