The answer is Recovery Time Objective (RTO), which defines the maximum acceptable downtime for a critical application after a disruption. This metric is correct because the IT department specified that the application must be restored within 4 hours, directly aligning with the RTO’s role as the target for how quickly services must be recovered to avoid unacceptable consequences. On the CISSP exam, this concept tests your understanding of business continuity planning (BCP) parameters, often appearing in scenario-based questions where you must distinguish RTO from the Recovery Point Objective (RPO), which focuses on data loss tolerance rather than downtime. A common trap is confusing the two: remember that RTO is about time to restore service, while RPO is about acceptable data age at recovery. A useful memory tip is to think of the “T” in RTO as standing for “Time” and the “P” in RPO as standing for “Point” in time—so RTO tells you how long you can wait, and RPO tells you how far back you can go.
CISSP Security and Risk Management Practice Question
This CISSP practice question tests your understanding of security and risk management. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An organization is developing a business continuity plan (BCP). The IT department has identified a critical application that must be restored within 4 hours of a disruption. Which metric defines the maximum acceptable time that the application can be unavailable?
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)
The Recovery Time Objective (RTO) defines the maximum acceptable downtime for a critical application after a disruption. In this scenario, the IT department has specified that the application must be restored within 4 hours, which directly aligns with the RTO metric. RTO is a key BCP parameter that drives resource allocation and recovery strategy design.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Recovery Time Objective (RTO)
Why this is correct
RTO defines the maximum acceptable downtime for a system.
Related concept
Read the scenario before looking for a memorised answer.
✗
Recovery Point Objective (RPO)
Why it's wrong here
RPO specifies acceptable data loss, not downtime.
✗
Mean Time to Repair (MTTR)
Why it's wrong here
MTTR is an average metric, not a maximum acceptable downtime.
✗
Mean Time Between Failures (MTBF)
Why it's wrong here
MTBF measures reliability, not allowable downtime.
✗
Service Level Agreement (SLA)
Why it's wrong here
SLA is a contract, not a specific recovery metric.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing RTO with RPO: candidates often pick RPO because they think 'recovery' refers to time, but RPO is about data loss tolerance, not downtime duration.
Detailed technical explanation
How to think about this question
RTO is a business-driven metric that directly influences recovery architecture decisions, such as whether to deploy active-active failover (near-zero RTO) or cold standby (hours of RTO). In practice, RTO must be validated through regular disaster recovery testing; a stated 4-hour RTO is meaningless if the actual recovery process takes 6 hours due to untested dependencies like network reconfiguration or database synchronization. The RTO also interacts with RPO: a tight RTO often requires automated failover, while a looser RTO may allow manual restore from tape.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Security and Risk Management — This question tests Security and Risk Management — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Recovery Time Objective (RTO) — The Recovery Time Objective (RTO) defines the maximum acceptable downtime for a critical application after a disruption. In this scenario, the IT department has specified that the application must be restored within 4 hours, which directly aligns with the RTO metric. RTO is a key BCP parameter that drives resource allocation and recovery strategy design.
What should I do if I get this CISSP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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