The most cost-effective replication strategy for meeting a 1-hour RTO and 15-minute RPO is asynchronous storage-level replication with 15-minute snapshots. This approach works because asynchronous replication transmits data changes in batches, avoiding the high bandwidth and latency costs of synchronous mirroring, while the scheduled snapshots cap data loss precisely at the 15-minute RPO window. On the Certified Cloud Security Professional CCSP exam, this scenario tests your ability to balance cost against recovery objectives in an IaaS relational database context—a common trap is choosing synchronous replication, which is over-engineered and expensive for a 15-minute RPO. Remember the memory tip: “Async for cash, sync for instant bling”—asynchronous replication saves money when your RPO allows a few minutes of data loss, while synchronous is only justified for zero-loss requirements.
CCSP Cloud Concepts, Architecture and Design Practice Question
This CCSP practice question tests your understanding of cloud concepts, architecture and design. 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.
A cloud architect is tasked with designing a disaster recovery plan for a critical application. The recovery time objective (RTO) is 1 hour, and the recovery point objective (RPO) is 15 minutes. The application runs on IaaS with data stored in a relational database. Which replication strategy is MOST cost-effective while meeting the objectives?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Asynchronous storage-level replication with 15-minute snapshots
Option D is correct because asynchronous storage-level replication with 15-minute snapshots meets the RPO of 15 minutes and the RTO of 1 hour, while being more cost-effective than synchronous replication. Asynchronous replication avoids the latency and bandwidth costs of synchronous mirroring across regions, and the 15-minute snapshot schedule ensures data loss is limited to the RPO window. This strategy is suitable for IaaS relational databases where near-real-time consistency is acceptable.
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.
✗
Daily full backups to another region
Why it's wrong here
Daily backups result in up to 24 hours of data loss, exceeding the 15-minute RPO.
✗
Synchronous database mirroring across regions
Why it's wrong here
Synchronous mirroring is expensive and may impact performance.
✗
Multi-region active-active deployment with load balancing
Why it's wrong here
Active-active is complex and costly; not necessary for the given RTO/RPO.
✓
Asynchronous storage-level replication with 15-minute snapshots
Why this is correct
Asynchronous replication with frequent snapshots meets the RPO cost-effectively.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that synchronous replication is always required for low RPOs, but here the RPO is 15 minutes, which asynchronous replication with snapshots can meet at lower cost, and candidates may incorrectly choose synchronous mirroring due to assuming zero data loss is needed.
Detailed technical explanation
How to think about this question
Asynchronous storage-level replication typically uses block-level replication (e.g., using protocols like iSCSI or proprietary APIs) to copy changed blocks to a secondary region at scheduled intervals. The 15-minute snapshot schedule leverages incremental snapshots (e.g., AWS EBS snapshots or Azure managed disk snapshots) that capture only changed data, minimizing storage costs. In a real-world scenario, if the primary region fails, the secondary region can be promoted using the latest snapshot, and the database can be recovered within the RTO, though transactions committed after the last snapshot are lost (within the RPO window).
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Cloud Concepts, Architecture and Design — This question tests Cloud Concepts, Architecture and Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Asynchronous storage-level replication with 15-minute snapshots — Option D is correct because asynchronous storage-level replication with 15-minute snapshots meets the RPO of 15 minutes and the RTO of 1 hour, while being more cost-effective than synchronous replication. Asynchronous replication avoids the latency and bandwidth costs of synchronous mirroring across regions, and the 15-minute snapshot schedule ensures data loss is limited to the RPO window. This strategy is suitable for IaaS relational databases where near-real-time consistency is acceptable.
What should I do if I get this CCSP 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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