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ISC2 CC Practice Question: Business Continuity, Disaster Recovery, and Incident Response
An organization adopts the 3-2-1 backup rule. Which combination of backups satisfies this 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
✓
Primary storage, backup server (disk), and cloud storage
3-2-1 rule: 3 copies of data, on 2 different media types, 1 offsite. Option D meets all: 3 copies (primary, backup server disk, cloud), 2 media (disk and cloud), 1 offsite (cloud).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Primary storage and one tape backup stored offsite
Why it's wrong here
Only two copies, one media type, one offsite; need three copies.
- ✗
Primary storage and two tape backups in the same room
Why it's wrong here
Only two copies, one media type (tape), no offsite copy.
- ✗
Primary storage, backup server (disk), and a second backup server (disk) in the same building
Why it's wrong here
Three copies, but only one media type (disk) and no offsite copy.
- ✓
Primary storage, backup server (disk), and cloud storage
Why this is correct
Three copies: primary, backup server, cloud; two media: disk and cloud; one offsite: cloud.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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