Quick Answer
The answer is security log analysis. This is the correct choice because security log analysis involves the systematic review of aggregated logs from firewalls, IDS, and servers to identify patterns, anomalies, or indicators of compromise, directly matching the scenario of detecting anomalous behavior through aggregated log review. On the Certified Information Systems Professional CISSP exam, this concept tests your understanding of the Monitoring and Detection domain, specifically how log review feeds into incident response and continuous security monitoring. A common trap is confusing this with vulnerability scanning or penetration testing, which are proactive assessments rather than reactive log review. Remember the memory tip: if you are looking at logs after the fact to find something unusual, you are performing security log analysis, not scanning for weaknesses.
This CISSP practice question tests your understanding of security assessment and testing. 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 security analyst is conducting a review of aggregated logs from firewalls, IDS, and servers to detect anomalous behavior. This activity is best described as:
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Security log analysis
Log analysis is the process of reviewing logs to detect incidents and anomalies.
Risk assessment
Why wrong: Risk assessment evaluates threats and impact, not specifically log review.
Vulnerability scanning
Why wrong: Vulnerability scanning identifies weaknesses but does not analyze logs for incidents.
Penetration testing
Why wrong: Penetration testing involves active exploitation, not log review.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Security log analysis
Security log analysis involves the systematic review of logs from firewalls, IDS, and servers to identify patterns, anomalies, or indicators of compromise. This activity directly matches the scenario of detecting anomalous behavior through aggregated log review, which is a core practice in security monitoring and incident detection.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Security log analysis
Why this is correct
Log analysis is the process of reviewing logs to detect incidents and anomalies.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Risk assessment
Why it's wrong here
Risk assessment evaluates threats and impact, not specifically log review.
Vulnerability scanning
Why it's wrong here
Vulnerability scanning identifies weaknesses but does not analyze logs for incidents.
Penetration testing
Why it's wrong here
Penetration testing involves active exploitation, not log review.
Common exam traps
The trap here is confusing security log analysis (a passive, detective control) with vulnerability scanning or penetration testing (active, preventive controls), leading candidates to choose a more 'technical-sounding' option like vulnerability scanning.
Detailed technical explanation
Security log analysis often relies on SIEM (Security Information and Event Management) systems that aggregate logs via syslog (RFC 5424) or similar protocols, normalizing timestamps and fields for correlation. Anomaly detection may use statistical baselines (e.g., standard deviation from mean event counts) or rule-based triggers (e.g., multiple failed logins from a single IP within 5 minutes). In real-world scenarios, this analysis can reveal lateral movement patterns or data exfiltration attempts that individual logs would miss.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A security team runs a vulnerability scan on a web application and discovers an unpatched SQL injection flaw. The team prioritises remediation by CVSS score — critical flaws are patched within 24 hours, high within 7 days. Questions like this test whether you understand vulnerability management processes, scanning tools, and remediation prioritisation.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security Assessment and Testing — study guide chapter
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FAQ
Security Assessment and Testing — This question tests Security Assessment and Testing — Read the scenario before looking for a memorised answer..
The correct answer is: Security log analysis — Security log analysis involves the systematic review of logs from firewalls, IDS, and servers to identify patterns, anomalies, or indicators of compromise. This activity directly matches the scenario of detecting anomalous behavior through aggregated log review, which is a core practice in security monitoring and incident detection.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This CISSP practice question is part of Courseiva's free ISC2 certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CISSP exam.
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