The answer is to store critical logs in hot storage for 90 days, then move all logs to warm or cold storage for the remainder of the year. This strategy directly aligns SIEM tiered storage with HIPAA compliance by ensuring that high-priority events like authentication failures remain immediately searchable for the required 90-day window, while less critical logs are shifted to cheaper tiers after 30 days, and all logs are retained for the full one-year mandate. On the CISSP exam, this scenario tests your understanding of data lifecycle management and cost-benefit analysis within the Security Operations domain, often appearing as a trap where candidates mistakenly keep everything in hot storage or fail to meet the 90-day searchability requirement. A key memory tip is “Hot for hunt, cold for hold”—hot storage supports active threat hunting and incident response, while cold storage satisfies long-term retention obligations without wasting budget.
CISSP Security Operations Practice Question
This CISSP practice question tests your understanding of security operations. 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 healthcare organization is implementing a new SIEM solution to centralize log management from its network devices, servers, and applications. The compliance team requires that all logs be retained for at least one year to meet HIPAA regulations. The SIEM platform has limited storage capacity and uses a hot/warm/cold tier architecture. The system currently ingests about 500 GB of logs per day. The security team wants to ensure that critical logs (e.g., authentication failures, privilege escalations) remain immediately searchable for at least 90 days, while less critical logs can be moved to cheaper storage after 30 days. What is the most cost-effective storage strategy that meets all requirements?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
Clue: "immediately / without restart"
Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Store critical logs in hot storage for 90 days, then move all logs to warm/cold storage for the remainder of the year.
Option D is correct because it aligns the SIEM's hot/warm/cold tier architecture with the organization's retention and searchability requirements. Critical logs remain in hot storage for 90 days for immediate searching, then all logs are moved to cheaper warm/cold storage for the remaining 275 days to meet the one-year HIPAA retention mandate. This balances cost efficiency with compliance, avoiding unnecessary hot storage costs for non-critical logs beyond 30 days.
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.
✗
Store all logs in hot storage for 90 days, then archive to cold storage indefinitely.
Why it's wrong here
Indefinite cold storage is unnecessarily costly and beyond requirement; also hot storage for all logs is expensive.
✗
Store only critical logs in hot storage for 1 year, delete non-critical logs after 30 days.
Why it's wrong here
Non-critical logs are still required for compliance; deleting them violates HIPAA.
✗
Store all logs in hot storage for 30 days, then delete them after 90 days.
Why it's wrong here
Fails 1-year retention requirement and deletes logs too early.
✓
Store critical logs in hot storage for 90 days, then move all logs to warm/cold storage for the remainder of the year.
Why this is correct
Meets both immediate searchability and long-term retention cost-effectively.
Clue confirmation
The clue words "least", "immediately / without restart" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume all logs must be treated identically or that compliance allows deletion of non-critical logs, but HIPAA requires retention of all logs for one year, and tiered storage allows cost-effective compliance by separating searchability from retention duration.
Detailed technical explanation
How to think about this question
In a hot/warm/cold SIEM architecture, hot storage uses SSD or high-performance disk for sub-second queries, warm storage uses slower HDD with acceptable query latency, and cold storage (e.g., S3 Glacier or tape) is for long-term archival with retrieval times of minutes to hours. The 500 GB/day ingestion rate means approximately 182.5 TB per year, so moving logs to cold storage after 90 days for critical and 30 days for non-critical reduces hot storage costs by over 80% while retaining all logs for compliance audits. Real-world SIEMs like Splunk or ELK stack enforce retention policies via index lifecycle management (ILM) or data tiering rules.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Security Operations — This question tests Security Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Store critical logs in hot storage for 90 days, then move all logs to warm/cold storage for the remainder of the year. — Option D is correct because it aligns the SIEM's hot/warm/cold tier architecture with the organization's retention and searchability requirements. Critical logs remain in hot storage for 90 days for immediate searching, then all logs are moved to cheaper warm/cold storage for the remaining 275 days to meet the one-year HIPAA retention mandate. This balances cost efficiency with compliance, avoiding unnecessary hot storage costs for non-critical logs beyond 30 days.
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.
Are there clue words in this question I should notice?
Yes — watch for: "least", "immediately / without restart". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.
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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