Which backup type backs up all data changed since the last full backup and typically requires more storage than incremental but restores faster since only the full backup and the latest differential are needed?

Which backup type backs up all data changed since the last full backup and typically requires more storage than incremental but restores faster since only the full backup and the latest differential are needed?

• A. Full Backup
• B. Differential Backup
• C. Incremental Backup
• D. 3-2-1 Backup Rule

Answer: (B)

Differential backups focus on capturing all changes since the last full backup. Each time you run a differential, you copy every file that has been modified since that last complete backup, so the amount of data grows until you perform the next full backup. That’s why it takes more storage than incremental backups, which only save changes since the last backup of any type. But the restore process with a differential is faster than with incremental: you only need the last full backup plus the most recent differential to reconstruct the current state, rather than applying a chain of multiple incremental backups in sequence. The full backup is still the baseline that doesn’t depend on prior backups for restoration, while the 3-2-1 rule describes a backup strategy about redundancy and locations rather than a backup type.

Differential backups focus on capturing all changes since the last full backup. Each time you run a differential, you copy every file that has been modified since that last complete backup, so the amount of data grows until you perform the next full backup. That’s why it takes more storage than incremental backups, which only save changes since the last backup of any type. But the restore process with a differential is faster than with incremental: you only need the last full backup plus the most recent differential to reconstruct the current state, rather than applying a chain of multiple incremental backups in sequence. The full backup is still the baseline that doesn’t depend on prior backups for restoration, while the 3-2-1 rule describes a backup strategy about redundancy and locations rather than a backup type.