PT0-002 Reconnaissance and Enumeration Practice Question
A penetration tester is performing passive reconnaissance on a target organization. Which of the following tools would be BEST suited to gather information about the organization's domain names, email addresses, and subdomains from publicly available sources without directly interacting with the target's systems?
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
✓
theHarvester
theHarvester is designed for passive OSINT gathering of emails, subdomains, IPs, etc. Maltego is also OSINT but more graph-oriented; theHarvester is specifically for email/subdomain enumeration.
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
Why it's wrong here
Nmap is an active scanning tool, not passive.
- ✓
theHarvester
Why this is correct
theHarvester performs passive OSINT collection of emails, subdomains, and hostnames.
- ✗
Nessus
Why it's wrong here
Nessus is a vulnerability scanner that actively probes systems.
- ✗
Metasploit
Why it's wrong here
Metasploit is an exploitation framework, not for passive reconnaissance.
Go deeper
Related to this question
Learn chapter
Penetration Testing Methodology
Key term
Maltego
Maltego is a graphical open-source intelligence tool used for information gathering and reconnaissance, enabling users to map and visualize relationships between entities like people, domains, and networks.
Key term
Enumeration
Enumeration is the systematic process of extracting detailed information about a target system, such as user accounts, network shares, services, and configurations, used during the reconnaissance phase of a security assessment.
About these practice questions
This PT0-003 question is part of Courseiva's 185-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This PT0-003 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 PT0-003 exam.