Which method can save historical configurations in Junos OS?

The Rollback feature in Junos OS is specifically designed to save and restore historical configurations. When changes are made to the device configuration, the system automatically keeps track of different versions of the configuration. This allows users to easily revert to a previous configuration state if needed. Rollback points are created at various stages, and administrators can use this feature to return to a known good state, which is crucial for troubleshooting or recovering from misconfigurations.

While there are other methods to manage configurations, such as backing up files or using version control, the Rollback feature is uniquely integrated into the system to give quick access to prior configurations, making it an essential tool for managing device settings dynamically and efficiently.