Which command saves your work and puts you back into operational mode?

The command that saves your work and puts you back into operational mode is "commit and-quit." This command is typically used in Junos OS to ensure that any configuration changes you have made are saved to the system before exiting the configuration mode. When you use this command, it commits (or saves) the changes you’ve made to the configuration and then exits back to the operational mode, where you can view or interact with the system's status and operation.

In this context, using "commit and-quit" is crucial in network operations because it confirms that the changes are applied, preventing accidental loss of configurations during the transition back to operational mode. It effectively combines the two actions of saving the changes and exiting the configuration mode into one streamlined command, making it very efficient for users managing network devices.