- A
Nmap service scan with -sV
Why wrong: Nmap service scan sends packets to the target and is an active scanning technique, which may be detected and is not passive.
- B
Shodan.io
Why wrong: Shodan is a search engine for internet-connected devices, but it relies on active scanning of IP ranges and is not purely passive for a specific target's web application.
- C
BuiltWith.com
BuiltWith.com is a passive reconnaissance tool that catalogues technology profiles from public data, allowing identification of frameworks and libraries without interacting with the target.
- D
Wappalyzer browser extension
Why wrong: Wappalyzer is a browser extension that analyzes the response from a visited website; it requires visiting the site, which is an active interaction and not purely passive.
Quick Answer
The correct answer is BuiltWith.com. This tool is best suited for passive web technology identification because it profiles a target’s web application stack—such as JavaScript libraries, frameworks, and analytics tools—by analyzing publicly available data and historical records, without sending any requests to the target’s servers. On the CompTIA PenTest+ PT0-002 exam, this question tests your ability to distinguish passive reconnaissance from active scanning; a common trap is choosing a tool like Wappalyzer or Nmap, which either require browser interaction or send probes to the target. BuiltWith’s strength lies in its purely passive, aggregate approach, making it ideal for stealthy initial recon. Memory tip: think “BuiltWith = Built Without touching the target.”
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. A key principle to apply: builtWith.com aggregates technology profiles from public data.. 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 conducting passive reconnaissance on a target organization. The tester wants to identify the technologies and frameworks used by the target's web application without making any requests to the target's servers. Which resource is BEST suited for this task?
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 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
BuiltWith.com
BuiltWith.com is a passive reconnaissance resource that profiles web application technologies by analyzing publicly available data, such as JavaScript libraries, web frameworks, and analytics tools, without sending any requests to the target's servers. It aggregates information from various public sources and historical data, making it ideal for identifying technologies without direct interaction.
Key principle: BuiltWith.com aggregates technology profiles from public data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Nmap service scan with -sV
Why it's wrong here
Nmap service scan sends packets to the target and is an active scanning technique, which may be detected and is not passive.
- ✗
Shodan.io
Why it's wrong here
Shodan is a search engine for internet-connected devices, but it relies on active scanning of IP ranges and is not purely passive for a specific target's web application.
- ✓
BuiltWith.com
Why this is correct
BuiltWith.com is a passive reconnaissance tool that catalogues technology profiles from public data, allowing identification of frameworks and libraries without interacting with the target.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
BuiltWith.com aggregates technology profiles from public data.
- ✗
Wappalyzer browser extension
Why it's wrong here
Wappalyzer is a browser extension that analyzes the response from a visited website; it requires visiting the site, which is an active interaction and not purely passive.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Shodan.io's passive-looking interface with true passive reconnaissance, not realizing that Shodan's data is derived from active scanning, while BuiltWith.com relies on non-intrusive public data aggregation.
Detailed technical explanation
How to think about this question
BuiltWith.com uses a combination of web crawling, DNS record analysis, and third-party data feeds to detect technologies such as React, Angular, jQuery, and server-side frameworks like Django or Ruby on Rails. It can identify specific versions of these technologies by examining patterns in JavaScript files, meta tags, and HTTP headers from cached or historical data, which is crucial for planning targeted exploits without alerting the target.
KKey Concepts to Remember
- BuiltWith.com aggregates technology profiles from public data.
- It identifies web frameworks, CMS, libraries, and hosting providers.
- BuiltWith operates by querying a pre-existing database of scanned websites.
- Using BuiltWith does not send any traffic to the target's servers.
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
BuiltWith.com aggregates technology profiles from public data.
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 builtWith.com aggregates technology profiles from public data., then practise related PT0-002 questions on the same topic to reinforce the concept.
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Information Gathering and Vulnerability Scanning — study guide chapter
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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 — BuiltWith.com aggregates technology profiles from public data..
What is the correct answer to this question?
The correct answer is: BuiltWith.com — BuiltWith.com is a passive reconnaissance resource that profiles web application technologies by analyzing publicly available data, such as JavaScript libraries, web frameworks, and analytics tools, without sending any requests to the target's servers. It aggregates information from various public sources and historical data, making it ideal for identifying technologies without direct interaction.
What should I do if I get this PT0-002 question wrong?
Review builtWith.com aggregates technology profiles from public data., then practise related PT0-002 questions on the same topic to reinforce the concept.
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?
BuiltWith.com aggregates technology profiles from public data.
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Last reviewed: Jun 11, 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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