To limit access for Taranis testing a backup application, what group should he be added to?

Adding Taranis to the Backup Operators group is the most appropriate choice for limiting access specifically for managing backup operations. This group is designed to allow users the ability to back up and restore files and directories, without granting them full administrative control over the system. Members of the Backup Operators group have special privileges that enable them to perform backup and restore tasks, which may require elevated permissions compared to standard users, but they do not have all the rights associated with an administrator.

This setup is beneficial for maintaining a secure environment, as it ensures that Taranis can perform necessary backup tasks while minimizing the risk of undesired changes to the system's configuration or security settings that could occur if he were part of the Administrators group. Being part of the Users group would not provide the necessary permissions for backup functions, and the Network Configuration Operators group is focused on managing network-related configurations rather than backup operations. Thus, the Backup Operators group is tailored specifically for this scenario.