- A
Using default community strings for SNMP
Why wrong: Default community strings (public/private) are a security issue, not a best practice for scanning; they might be used for discovery but not as a general consideration.
- B
Configuring the scanner to use the appropriate credentials
Credentials are required for authenticated scans; using wrong credentials leads to incomplete results.
- C
Ensuring the scan will not disrupt production services
Scans can cause resource exhaustion or crashes; verifying minimal impact is important.
- D
Selecting a random scan time to avoid detection
Why wrong: While stealth is sometimes desired, random timing is not a primary consideration for authenticated scans; planning during off-hours is more common.
- E
Obtaining written authorization from the target organization
Authorization is critical to ensure the scan is legal and within scope.
PT0-002 Practice Question: Information Gathering and Vulnerability Scanning
This PT0-002 practice question tests your understanding of information gathering and vulnerability scanning. 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 penetration tester is preparing to perform an authenticated vulnerability scan of a network. Which THREE of the following are important considerations before starting the scan? (Select THREE.)
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
Configuring the scanner to use the appropriate credentials
Authenticated scans require valid credentials to log into systems for deeper assessment. It's important to understand the risk of service disruption, ensure credentials have appropriate privileges, and obtain written authorization to avoid legal issues.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Using default community strings for SNMP
Why it's wrong here
Default community strings (public/private) are a security issue, not a best practice for scanning; they might be used for discovery but not as a general consideration.
- ✓
Configuring the scanner to use the appropriate credentials
Why this is correct
Credentials are required for authenticated scans; using wrong credentials leads to incomplete results.
Related concept
Authentication checks who the user is.
- ✓
Ensuring the scan will not disrupt production services
Why this is correct
Scans can cause resource exhaustion or crashes; verifying minimal impact is important.
Related concept
Authentication checks who the user is.
- ✗
Selecting a random scan time to avoid detection
Why it's wrong here
While stealth is sometimes desired, random timing is not a primary consideration for authenticated scans; planning during off-hours is more common.
- ✓
Obtaining written authorization from the target organization
Why this is correct
Authorization is critical to ensure the scan is legal and within scope.
Related concept
Authentication checks who the user is.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PT0-002 questions on access control and AAA configuration.
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Information Gathering and Vulnerability Scanning — study guide chapter
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Information Gathering and Vulnerability Scanning practice questions
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FAQ
Questions learners often ask
What does this PT0-002 question test?
Information Gathering and Vulnerability Scanning — This question tests Information Gathering and Vulnerability Scanning — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Configuring the scanner to use the appropriate credentials — Authenticated scans require valid credentials to log into systems for deeper assessment. It's important to understand the risk of service disruption, ensure credentials have appropriate privileges, and obtain written authorization to avoid legal issues.
What should I do if I get this PT0-002 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related PT0-002 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jul 4, 2026
This PT0-002 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 PT0-002 exam.
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