Which Backup Technique Captures Changed Data Since Last Full Backup?

Which of the following backup techniques is used to capture all the data that has changed since the last full backup?

A.

Incremental

B.

Replica

C.

Differential

D.

Snapshot.

C.

The backup technique that captures all the data that has changed since the last full backup is called incremental backup. An incremental backup only backs up data that has changed or been added since the last full backup, meaning it takes less time and requires less storage space than a full backup. The first incremental backup after a full backup will back up all changes since the full backup. Subsequent incremental backups will only back up changes since the previous incremental backup.

In contrast, a differential backup backs up all data that has changed since the last full backup, meaning it takes more time and requires more storage space than an incremental backup. Replica backup is a type of backup that creates an exact copy of the original data, usually in real-time. Snapshot is a type of backup that creates a point-in-time copy of data, allowing you to roll back to that point in case of data loss or corruption.

Overall, incremental backup is a useful backup technique for organizations that require frequent backups and have limited storage space.