CompTIA Security+ (SY0-601) — Question 439

A local server recently crashed and the team is attempting to restore the server from a backup. During the restore process, the team notices the file size of each daily backup is large and will run out of space at the current rate. The current solution appears to do a full backup every night.

Which of the following would use the least amount of storage space for backups?

Answer options

• A. A weekly, incremental backup with daily differential backups
• B. A weekly, full backup with daily snapshot backups
• C. A weekly, full backup with daily differential backups
• D. A weekly, full backup with daily incremental backups

Correct answer: D

Explanation

Option D is the most storage-efficient method because it combines a full backup once a week with daily incremental backups, which only save changes made since the last backup. The other options, such as daily differential backups or full backups, require more storage because they either replicate full data or include all changes since the last full backup, leading to larger file sizes.