Network Defense Essentials (NDE) Practice Exam 2026 – Your All-in-One Resource to Exam Success!

The correct answer is based on the concept that a hot backup is performed while the database or application is online and accessible to users. This type of backup allows ongoing user transactions and activities to continue without interruption. However, during the backup process, the data being written or changed by users is not reflected in the backup until it is completed. This means that any changes made while the backup is occurring may not be included in the backup set, resulting in a momentary discrepancy between the data in use and the data captured in the backup.

In contrast, other backup methods have restrictions that prevent simultaneous user access. For instance, cold backups require the system to be offline, ensuring all data is static and consistent, thereby capturing the exact state of the system without any changes made during the backup process. Incremental backups save only the data that has changed since the last full or incremental backup, but they cannot be conducted while the system is actively being used; otherwise, they may miss critical updates. Mirror backups create an exact copy of the entire data set but also often require the system to be inactive to ensure consistency.

Thus, hot backups are the unique choice that allows for backing up data while users are actively accessing the system, highlighting their importance in environments where high