What command would you use to save the configuration of ACLs on a router?

To save the configuration of Access Control Lists (ACLs) on a router, the appropriate command is to copy the running configuration to the startup configuration. This is accomplished using the command that specifically transfers the current operational configuration, which includes all ACLs and other configurations, from RAM to NVRAM. This ensures that any changes made during the current session are preserved even after the router is rebooted.

When the running configuration is saved in this manner, it allows the router to boot up with the same settings in place, ensuring that the ACLs are enforced as intended. The copy running-config startup-config command effectively backs up the current state of the router's configurations including any newly defined access lists.

The other commands do not accurately reflect the correct method for saving configurations. For example, while "write memory" may also save the configuration in Cisco devices, it is essentially an alias for the command that correctly uses the term 'copy.' The other options, "save access-list config" and "store access-list settings," are not valid Cisco commands for preserving ACL configurations.