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ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
An organization stores backup data on a tape drive (onsite) and also replicates critical data to a cloud storage service. This practice best exemplifies which backup rule?
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
✓
3-2-1 backup rule
The 3-2-1 rule requires at least three copies of data (the original plus two backups), stored on two different media types, with one copy kept offsite. In this scenario, the original live data serves as the first copy, the tape backup (onsite) is the second copy on a different medium, and the cloud backup (offsite) is the third copy on another medium, satisfying the rule.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Incremental backup strategy
Why it's wrong here
Incremental backup backs up changes since last backup, not relevant to the 3-2-1 rule.
- ✗
Differential backup strategy
Why it's wrong here
Differential backup backs up changes since last full backup, not related to the rule.
- ✗
Full backup strategy
Why it's wrong here
Full backup refers to copying all data, not the number of copies or media types.
- ✓
3-2-1 backup rule
Why this is correct
The scenario describes 2 copies (tape and cloud), 2 media types (tape and cloud storage), and 1 offsite (cloud), meeting the 3-2-1 rule.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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