In Junos, which command would you use to review the history of configuration changes?

The command to review the history of configuration changes in Junos is "commit history." This command provides a detailed list of all the commit operations that have been performed on the device, including timestamps and the user who made each change. It allows network administrators to track the changes made to the configuration over time, making it easier to identify when changes occurred and who initiated them. This is particularly useful for auditing purposes and troubleshooting issues that may arise after certain changes are implemented.

The other commands serve different purposes: "show configuration" displays the current, active configuration, while "rollback history" is used to view the different versions of the configuration that have been saved in the rollback database. "Show configuration history" is not a valid Junos command and does not provide the intended information about commit actions, which is the focus of the question. Therefore, "commit history" is the accurate command for reviewing the history of configuration changes.