A system administrator has just performed a backup. Which of the following should the administrator perform to easily identify the backup tape?

Labeling the tape is crucial for easy identification. When a system administrator performs a backup, it is essential to know what data is stored on each backup medium, especially when several backups may need to be managed over time. By clearly labeling the tape, the administrator can quickly identify the contents, including the date of the backup, the type of data included, or other pertinent details. This practice minimizes confusion and enables efficient data recovery processes when needed.

While mounting the tape in the drive and placing the tape in a rack are both operational steps taken during backup processes, they do not facilitate easy identification of the tape's contents. Similarly, updating the site log is an important practice for tracking backup operations but is not a direct method for identifying specific tapes physically. Therefore, labeling the tape stands out as the most effective approach to ensure clarity and organization in backup management.