Which is true of the differential backup strategy?

The differential backup strategy is designed to capture all changes made since the last full backup. This means that when you perform a differential backup, it will include all data that has changed since that last full backup, regardless of when any other type of backup was performed. This approach ensures that you have a complete set of the most recent data modifications stored, enabling easier restoration by simply using the last full backup and the most recent differential backup.

In contrast, options discussing slow backup times, limited data capture, or storage space concerns do not specifically pertain to the defining characteristics of a differential backup. For instance, while the backup time may vary, it is generally faster than a full backup but can become longer as more changes accumulate. Additionally, the differential backup does not back up only the new data since the most recent backup of any type; rather, it focuses solely on changes since the last full backup. Lastly, while it does use storage space, it is typically more efficient than an incremental backup but less space-efficient than a full backup since it builds upon the full backup's data over time.