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 SOC team is evaluating a SIEM rule that triggers on 'more than 10 failed login attempts from a single source within 5 minutes.' The rule is generating too many alerts from a legitimate external monitoring service. How should the rule be modified?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add an exception for the source IP of the monitoring service.
Option C is correct because the rule is generating false positives from a known, legitimate source. Adding an exception for the monitoring service's source IP allows the SIEM to continue detecting actual brute-force attacks while ignoring expected traffic from that specific host. This is a standard whitelisting technique in SIEM rule tuning to reduce noise without compromising security coverage.
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.
✗
Increase the threshold to 20 failed attempts.
Why it's wrong here
This may allow attackers to try more before alerting.
✗
Disable the rule and rely on other detection methods.
Why it's wrong here
Removing the rule weakens security.
✓
Add an exception for the source IP of the monitoring service.
Why this is correct
Exceptions effectively reduce false positives without changing rule logic.
Related concept
Read the scenario before looking for a memorised answer.
✗
Extend the time window to 10 minutes.
Why it's wrong here
Longer window may include more legitimate attempts, not fewer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the concept that tuning a SIEM rule should preserve detection capability for actual threats, so candidates mistakenly choose threshold or time-window adjustments (A or D) instead of the more precise fix of adding an exception for the known benign source.
Detailed technical explanation
How to think about this question
SIEM rules often use correlation logic that counts events within a sliding time window; adding a source IP exception is implemented as a filter condition in the rule's query (e.g., 'NOT source_ip IN (x.x.x.x)'). In real-world deployments, legitimate services like vulnerability scanners or VPN health checks can trigger brute-force thresholds, and whitelisting their IPs is preferred over threshold adjustments that could mask real attacks. This approach maintains the rule's sensitivity for unknown sources while eliminating predictable false positives.
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 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
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.
Security Monitoring — This question tests Security Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add an exception for the source IP of the monitoring service. — Option C is correct because the rule is generating false positives from a known, legitimate source. Adding an exception for the monitoring service's source IP allows the SIEM to continue detecting actual brute-force attacks while ignoring expected traffic from that specific host. This is a standard whitelisting technique in SIEM rule tuning to reduce noise without compromising security coverage.
What should I do if I get this 200-201 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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