The correct answer is to activate the 'safe checks' option in the scanner. This configuration prevents the vulnerability scanner from running intrusive plug-ins that aggressively attempt to exploit services, which is exactly what caused the service to crash and generated misleading findings. By enabling safe checks, the scanner still identifies potential vulnerabilities through non-disruptive methods like banner grabbing and configuration analysis, ensuring the target service remains stable. On the CompTIA PenTest+ PT0-002 exam, this concept tests your understanding of scan tuning and risk management—a common trap is assuming all plug-ins must run for a thorough scan, but safe checks prioritize stability over aggression. Remember the mnemonic "Safe Stops Service Crashes" to recall that safe checks prevent service interruptions while still detecting flaws.
PT0-002 Practice Question: Information Gathering and Vulnerability Scanning
This PT0-002 practice question tests your understanding of information gathering and vulnerability scanning. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
During a vulnerability scan, a penetration tester notices that the scanner is repeatedly attempting to exploit a service, causing the service to crash and generating misleading findings. Which of the following scan configurations would BEST help the tester avoid this issue while still identifying potential vulnerabilities?
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
✓
Activate the 'safe checks' option in the scanner
Option C is correct because the 'safe checks' option in vulnerability scanners (such as Nessus or OpenVAS) disables intrusive plug-ins that attempt to exploit services aggressively, which can cause service crashes. This configuration allows the scanner to identify potential vulnerabilities without disrupting the target service, avoiding misleading findings from crashed services.
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.
✗
Enable SYN scan instead of full TCP connect scan
Why it's wrong here
SYN scan is used for port discovery, not for controlling exploitation attempts during vulnerability testing.
✗
Adjust the scan timing template to a slower rate
Why it's wrong here
Slower timing reduces network load but does not prevent the scanner from attempting aggressive exploits.
✓
Activate the 'safe checks' option in the scanner
Why this is correct
Correct. Safe checks perform non-intrusive testing, minimizing disruption and reducing false positives from exploitation attempts.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the port range to include high ports
Why it's wrong here
Increasing port range expands scanning scope but does not change the scanner's aggressiveness in testing services.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse scan rate adjustments (timing templates) or stealth techniques (SYN scan) with the ability to prevent service disruption, when in fact only disabling intrusive checks directly addresses the crashing issue.
Detailed technical explanation
How to think about this question
Vulnerability scanners like Nessus categorize plug-ins into families such as 'safe' and 'destructive'; the 'safe checks' option disables plug-ins that perform active exploitation (e.g., denial-of-service attempts or brute-force attacks) while still running passive checks like banner grabbing and configuration analysis. In real-world engagements, a tester might use this option during initial reconnaissance to avoid disrupting production services, then later run a full intrusive scan in a controlled maintenance window. This approach aligns with the PT0-002 objective of balancing thoroughness with operational safety.
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 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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this PT0-002 question in full detail.
Information Gathering and Vulnerability Scanning — This question tests Information Gathering and Vulnerability Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Activate the 'safe checks' option in the scanner — Option C is correct because the 'safe checks' option in vulnerability scanners (such as Nessus or OpenVAS) disables intrusive plug-ins that attempt to exploit services aggressively, which can cause service crashes. This configuration allows the scanner to identify potential vulnerabilities without disrupting the target service, avoiding misleading findings from crashed services.
What should I do if I get this PT0-002 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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