Business Continuity, Disaster Recovery, and Incident Response →mediumMultiple ChoiceObjective-mapped
ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
During a disaster recovery test, the IT team discovers that restoring all data from full backups takes 48 hours, exceeding the RTO. Which backup strategy would reduce restore time while maintaining a similar backup window?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Using differential backups instead of incremental
A differential backup backs up all changes since the last full backup, so restore requires only the full backup and the latest differential, reducing restore time compared to incremental.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increasing backup frequency to hourly
Why it's wrong here
More frequent backups increase backup time and storage, but restore time may still be long.
- ✗
Implementing the 3-2-1 backup rule
Why it's wrong here
The 3-2-1 rule improves reliability but does not directly reduce restore time.
- ✗
Switching from full to incremental backups only
Why it's wrong here
Incremental backups restore slower because they require all increments since the last full.
- ✓
Using differential backups instead of incremental
Why this is correct
Differential backups capture all changes since the last full, enabling faster restore with only two tapes.
Go deeper
Related to this question
Learn chapter
Business Continuity and Disaster Recovery
Key term
Business Continuity Planning
Business Continuity Planning is the process of creating a strategy to keep an organization's essential functions running during and after a major disruption.
Key term
Recovery
Recovery is the process of restoring systems, data, and operations after a security incident, failure, or disaster to return to normal functioning.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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