How do you rollback to the certified configuration?

• A. revert
• B. rollback-config
• C. reset
• D. reload

Answer: (D)

Rolling back to a certified configuration means returning the device to a known-good setup that is saved as the startup configuration. The way to ensure that exact state is loaded is to reload the device. When you issue a reload, the system restarts and on boot brings up the startup configuration as the active running setup. Any changes made in the current running configuration that weren’t saved are discarded, so you’re back to the certified configuration. This approach guarantees a clean, tested state, though it will cause downtime while the device reboots. Other options either reset to factory defaults or apply changes without returning to the saved startup state, so they don’t guarantee loading the certified configuration like a reload does.