- A
Remove the rule entirely because failed logins are common.
Why wrong: Removing the rule would miss real attacks; tuning is preferred.
- B
Add a condition that the source IP is external to the network.
Correct. External source IPs are more likely to be attackers; internal failures may be benign.
- C
Exclude failed logins from known administrative accounts.
Why wrong: Excluding accounts could miss compromised admin accounts; not recommended.
- D
Increase the threshold to require at least 10 failed login attempts within 5 minutes.
Why wrong: 10 within 5 minutes may be too high and miss slower brute-force; a moderate threshold is better.
- E
Limit the rule to logins from remote IP addresses.
Correct. Remote logins are more indicative of brute-force than local console failures.
CS0-003 Security Operations Practice Question
This CS0-003 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.
An analyst is tuning a SIEM rule that triggers on failed logins. Which TWO modifications would most effectively reduce false positives without missing actual brute-force attacks? (Select TWO.)
Answer choices
Why each option matters
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 source IP is external to the network.
Limiting to remote logins reduces false positives from local console failures. Adding a threshold (e.g., >5) ensures only excessive failures alert, reducing noise from single failures.
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.
- ✗
Remove the rule entirely because failed logins are common.
Why it's wrong here
Removing the rule would miss real attacks; tuning is preferred.
- ✓
Add a condition that the source IP is external to the network.
Why this is correct
Correct. External source IPs are more likely to be attackers; internal failures may be benign.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Exclude failed logins from known administrative accounts.
Why it's wrong here
Excluding accounts could miss compromised admin accounts; not recommended.
- ✗
Increase the threshold to require at least 10 failed login attempts within 5 minutes.
Why it's wrong here
10 within 5 minutes may be too high and miss slower brute-force; a moderate threshold is better.
- ✓
Limit the rule to logins from remote IP addresses.
Why this is correct
Correct. Remote logins are more indicative of brute-force than local console failures.
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 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.
What to study next
Got this wrong? Here's your next step.
Identify which CS0-003 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.
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Security Operations — study guide chapter
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FAQ
Questions learners often ask
What does this CS0-003 question test?
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: Add a condition that the source IP is external to the network. — Limiting to remote logins reduces false positives from local console failures. Adding a threshold (e.g., >5) ensures only excessive failures alert, reducing noise from single failures.
What should I do if I get this CS0-003 question wrong?
Identify which CS0-003 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
This CS0-003 practice question is part of Courseiva's free CompTIA 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 CS0-003 exam.
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