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 analyst is tuning a correlation rule that detects DNS tunneling. The rule currently generates 500 alerts per day, but only 5% are true positives. Which tuning approach would best reduce false positives while maintaining detection efficacy?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a condition that the number of unique domains queried per source IP exceeds 10 per minute.
Option B is correct because adding a threshold for domain query rate per IP reduces noise from normal high-volume DNS activity. Option A is wrong because increasing the time window may increase false positives. Option C is wrong because decreasing entropy threshold may cause more false positives. Option D is wrong because disabling the rule loses detection.
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.
✗
Lower the entropy threshold for domain names from 3.5 to 2.0.
Why it's wrong here
Lower entropy threshold includes more benign domains, increasing false positives.
✗
Disable the rule and rely on manual review of DNS logs.
Why it's wrong here
Manual review is not scalable and may miss attacks.
✗
Increase the observation time window from 1 hour to 24 hours.
Why it's wrong here
A longer window may include more benign traffic, increasing false positives.
✓
Add a condition that the number of unique domains queried per source IP exceeds 10 per minute.
Why this is correct
This threshold helps differentiate tunneling from normal DNS behavior.
Clue confirmation
The clue word "best" 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
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 200-201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 a condition that the number of unique domains queried per source IP exceeds 10 per minute. — Option B is correct because adding a threshold for domain query rate per IP reduces noise from normal high-volume DNS activity. Option A is wrong because increasing the time window may increase false positives. Option C is wrong because decreasing entropy threshold may cause more false positives. Option D is wrong because disabling the rule loses detection.
What should I do if I get this 200-201 question wrong?
Identify which 200-201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
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.
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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