This 200-201 practice question tests your understanding of security monitoring. 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 company uses a SIEM with correlation rules. They notice that a rule designed to detect brute-force attacks is not triggering even though failed logins are occurring. Which is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The SIEM is receiving too many logs and dropping events.
Why wrong: Would likely cause other rules to fail also.
The correlation rule threshold is set too high.
The number of failed attempts may be below the threshold.
The SIEM time zone is misconfigured.
Why wrong: Would affect timestamps, not rule triggering per se.
The log source is not sending syslog data.
Why wrong: Would cause all rules to fail for that source.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The correlation rule threshold is set too high.
A SIEM correlation rule for brute-force attacks typically triggers when the number of failed login attempts from a single source exceeds a defined threshold within a specific time window. If the threshold is set too high, the rule will not fire even though failed logins are occurring, because the count never reaches the required value. This is the most direct and common cause for a correlation rule not triggering when expected.
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.
The SIEM is receiving too many logs and dropping events.
Why it's wrong here
Would likely cause other rules to fail also.
The correlation rule threshold is set too high.
Why this is correct
The number of failed attempts may be below the threshold.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
The SIEM time zone is misconfigured.
Why it's wrong here
Would affect timestamps, not rule triggering per se.
The log source is not sending syslog data.
Why it's wrong here
Would cause all rules to fail for that source.
Common exam traps
Cisco often tests the concept that a correlation rule's threshold is a direct control over its sensitivity, and candidates may mistakenly attribute the issue to data ingestion problems (like dropped logs or misconfigured time zones) rather than the rule's own configuration.
Detailed technical explanation
SIEM correlation rules often use a sliding time window (e.g., 5 minutes) and a count threshold (e.g., 10 failed logins). The threshold is a configurable parameter; setting it too high (e.g., 1000) means the rule will only trigger during extreme attacks, missing lower-volume brute-force attempts. In real-world tuning, analysts must balance sensitivity against false positives, often starting with a low threshold and adjusting based on baseline traffic.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the 200-201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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 Monitoring — study guide chapter
Learn the concepts, then practise the questions
Security Monitoring practice questions
Targeted practice on this topic area only
All 200-201 questions
507 questions across all exam domains
Cisco CyberOps Associate 200-201 study guide
Full concept coverage aligned to exam objectives
200-201 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise 200-201 questions linked to Security Policies and Procedures.
Practise 200-201 questions linked to Security Concepts.
Practise 200-201 questions linked to Security Monitoring.
Practise 200-201 questions linked to Host-Based Analysis.
Practise 200-201 questions linked to Network Intrusion Analysis.
Practise 200-201 questions linked to 200-201 fundamentals.
Practise 200-201 questions linked to 200-201 scenario.
Practise 200-201 questions linked to 200-201 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Security Monitoring — This question tests Security Monitoring — Read the scenario before looking for a memorised answer..
The correct answer is: The correlation rule threshold is set too high. — A SIEM correlation rule for brute-force attacks typically triggers when the number of failed login attempts from a single source exceeds a defined threshold within a specific time window. If the threshold is set too high, the rule will not fire even though failed logins are occurring, because the count never reaches the required value. This is the most direct and common cause for a correlation rule not triggering when expected.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 11, 2026
This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.