220-1102 · Question #70
A technician is setting up a backup method on a workstation that only requires two sets of tapes to restore. Which of the following would BEST accomplish this task?
The correct answer is A. Differential backup. A differential backup system requires only a full backup and the latest differential backup to restore all data, making it efficient with two sets of tapes.
Question
A technician is setting up a backup method on a workstation that only requires two sets of tapes to restore. Which of the following would BEST accomplish this task?
Options
- ADifferential backup
- BOff-site backup
- CIncremental backup
- DFull backup
How the community answered
(31 responses)- A77% (24)
- B6% (2)
- C13% (4)
- D3% (1)
Why each option
A differential backup system requires only a full backup and the latest differential backup to restore all data, making it efficient with two sets of tapes.
A differential backup backs up all data that has changed since the last full backup. To restore, only the original full backup and the most recent differential backup are needed, fulfilling the requirement of using only two sets of tapes for restoration.
Off-site backup refers to the storage location, not the backup method itself or the number of tapes needed for restoration.
An incremental backup backs up data changed since the last backup (full or incremental), requiring the original full backup and all subsequent incremental backups for a full restore, which would be more than two sets.
A full backup creates a complete copy of all data, but if daily changes occur, restoring from only one full backup set means data from between full backups would be lost, and it doesn't align with the 'two sets of tapes to restore' requirement for combined daily backup strategy.
Concept tested: Backup strategies (Differential backup)
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-server-backup/what-is-windows-server-backup#full-incremental-and-differential-backup
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