CompTIA Server+ (SK0-005)Security and Disaster RecoveryEasy
A server administrator is implementing a new backup strategy for critical financial data. The requirement is to have a full backup performed weekly, with daily backups capturing only changes since the last full or incremental backup. The backups must be stored off-site, and restoration time is a key concern. Which backup type best fits these requirements?
- ASnapshot backup
- BIncremental backup
- CDifferential backup
- DFull backup
Show answer & explanationAnswer & explanation
Correct answer: B. Incremental backup
An incremental backup captures only the data that has changed since the last full or incremental backup, making daily backups quick and efficient. While restoration can require multiple tapes/files, it aligns with the requirement for daily backups capturing only changes.
Why the other options are wrong
- A. Snapshot backups create a point-in-time image, but are not typically a primary strategy for daily incremental data changes in this context.
- C. Differential backups save all changes since the last full backup, growing larger each day until the next full backup.
- D. Full backups capture all data, which would be inefficient for daily operations.
Incremental Backup
A backup type that copies only data that has changed since the last full or incremental backup.
- Smallest daily backup size
- Fastest daily backup time
- Restoration requires the last full backup and all subsequent incremental backups
Memory trick: Incremental: It's all about the 'next step' changes.