A company is planning its backup strategy and wants to minimize storage usage while ensuring fast restores. Which TWO backup types should the company consider as primary and secondary backups? (Select TWO)
Trap 1: Full backup daily, no other backups
Incorrect. Full backup daily uses excessive storage and does not involve a secondary backup type.
Trap 2: Full backup monthly, incremental weekly
Incorrect. Monthly full with weekly incremental results in slow restore when many incrementals are needed, and may not meet recovery time objectives.
Trap 3: Full backup weekly, incremental daily, and differential weekly
Incorrect. This involves three backup types (full, incremental, differential) and is not a simple primary-secondary strategy; also uses more storage and complexity.
- A
Full backup weekly, incremental daily
Correct. Full backup weekly with daily incremental backups minimizes storage because incrementals only store changes. Restore requires the full plus all incrementals, which is slower but storage-efficient.
- B
Full backup daily, no other backups
Why wrong: Incorrect. Full backup daily uses excessive storage and does not involve a secondary backup type.
- C
Full backup weekly, differential daily
Correct. Full backup weekly with daily differential backups provides a fast restore (full plus latest differential) while still reducing storage compared to daily fulls, though more storage than incremental.
- D
Full backup monthly, incremental weekly
Why wrong: Incorrect. Monthly full with weekly incremental results in slow restore when many incrementals are needed, and may not meet recovery time objectives.
- E
Full backup weekly, incremental daily, and differential weekly
Why wrong: Incorrect. This involves three backup types (full, incremental, differential) and is not a simple primary-secondary strategy; also uses more storage and complexity.