CompTIA Cloud+ (CV0-002) — Question 77

A company is seeking a new backup solution for its virtualized file servers that fits the following characteristics:
✑ The files stored on the servers are extremely large.
✑ Existing files receive multiple small changes per day.
✑ New files are only created once per month.
✑ All backups are being sent to a cloud repository.
Which of the following would BEST minimize backup size?

Answer options

Correct answer: D

Explanation

Change block tracking is the best choice because it only backs up the portions of files that have changed, significantly reducing the amount of data transferred and stored. Local snapshots capture the entire state of the system at a point in time, which can lead to larger backup sizes. Differential backups store changes since the last full backup, but still require more space than change block tracking. File-based replication involves copying entire files, which is not efficient given the frequent small changes.