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CAS-004 Evaluating its disaster recovery plan Practice Question
A company is evaluating its disaster recovery plan. Which metric indicates the maximum acceptable downtime?
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
✓
Recovery Time Objective (RTO)
Recovery Time Objective (RTO). RTO defines the maximum acceptable downtime for a system or application after a disaster. Option A (MTTR) measures the average time to repair a failed component. Option B (RPO) defines the maximum acceptable data loss. Option D (MTBF) measures the average time between failures, indicating reliability.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Mean Time to Repair (MTTR)
Why it's wrong here
MTTR measures average repair time, not acceptable downtime.
- ✗
Recovery Point Objective (RPO)
Why it's wrong here
RPO defines acceptable data loss, not downtime.
- ✓
Recovery Time Objective (RTO)
Why this is correct
RTO is the maximum acceptable downtime.
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Mean Time Between Failures (MTBF)
Why it's wrong here
MTBF measures system reliability over time.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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