問題文
An administrator wants a known-good configuration that can be restored in one step even after many later commits. Which mechanism is designed for that?
選択肢
- Save the current configuration as the rescue configuration, and later load it back and commit it.
- Copy the configuration into a comment inside the configuration itself, so that the text is always present on the device and can be uncommented in a single step when the earlier state is needed again.
- Rely on the numbered history, choosing the entry that corresponds to that configuration and keeping that number for as long as the device runs.
- Set the device back to its factory-default state.