CISSP Question of the Week: File Backup

The correct answer is B.

A differential backup backs up the files in a backup set that were added or changed since the last full backup. A differential backup type grows as the week progresses and no new full backups have been performed. To restore data in a full/differential backup scheme, you need to restore the most recent full backup and the most recent differential backup that occurred since the last full backup.

A full backup, sometimes referred to as an archive backup, backs up all files in a backup set.

An incremental backup backs up all files in a backup set that were created or changed since the last backup of any type. To restore data in a full/incremental backup scheme, you need to restore the most recent full backup and then restore in order all incremental backups that have occurred since the most recent backup.

Administrators should consider regularly backing up information on network computers to protect against data loss, which can be caused by misuse of equipment, hacker infiltration, or equipment failure.