CEH Footprinting, Reconnaissance and Scanning Practice Question
Which THREE of the following are common techniques used during the footprinting phase? (Choose three.)
⚠ Common exam trap
EC-Council often tests the distinction between footprinting (passive, non-intrusive) and scanning (active, intrusive), so candidates mistakenly classify port scanning or exploitation as footprinting techniques.
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
✓
WHOIS lookup
WHOIS lookup is a footprinting technique that queries domain registration databases (e.g., whois.arin.net) to obtain registrant contact details, name servers, and registration dates. Google hacking (also known as Google dorking) uses advanced search operators to uncover sensitive information indexed by search engines, such as exposed configuration files or login pages. DNS zone transfer (AXFR) is a footprinting technique that, if misconfigured, allows an attacker to retrieve a complete list of DNS records for a domain, revealing internal hostnames and network structure. All three are passive or semi-passive information-gathering methods performed without directly engaging the target's systems.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Exploitation
Why it's wrong here
Exploitation represents the phase where an attacker actively leverages identified vulnerabilities to gain unauthorized access or control over a system. This technique is fundamentally distinct from footprinting, which focuses solely on passive or semi-passive information gathering about the target's infrastructure, personnel, and operations. Footprinting precedes exploitation, providing the necessary intelligence to identify potential weaknesses before any attempt to compromise the system is made.
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Port scanning
Why it's wrong here
Port scanning is an active reconnaissance technique used to identify open ports and services running on a target system. While it provides valuable information about network services, it involves direct interaction with the target, which can be detected by intrusion detection systems (IDS) or firewalls. Footprinting, by contrast, primarily emphasizes less intrusive, often passive, methods of information collection to map the target's external posture without alerting them.
- ✓
WHOIS lookup
Why this is correct
A WHOIS lookup is a fundamental footprinting technique that queries public databases to retrieve registration details for domain names and IP addresses. This process reveals critical information such as the domain owner's name, organization, contact email, physical address, registration and expiration dates, and associated DNS name servers. Such data is invaluable for identifying potential targets, understanding organizational structure, and mapping network infrastructure during the initial reconnaissance phase.
- ✓
Google hacking
Why this is correct
Google hacking, also known as Google dorking, utilizes advanced search operators and specific queries to uncover sensitive information inadvertently exposed on public web servers and indexed by search engines. Attackers employ dorks like "filetype:pdf", "intitle:index.of", or "inurl:admin" to locate configuration files, directory listings, login portals, or documents containing credentials. This passive technique effectively extracts valuable intelligence without direct interaction with the target's systems.
- ✓
DNS zone transfer
Why this is correct
A DNS zone transfer (AXFR request) is a mechanism where a secondary DNS server requests a copy of the entire zone file from a primary DNS server. If misconfigured, a primary DNS server might allow unauthorized zone transfers to any requesting client, revealing a comprehensive list of all hostnames, IP addresses, mail servers, and other internal network resources within the domain. This provides an invaluable, detailed map of the target's network infrastructure during footprinting.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CEH practice question is part of Courseiva's free EC-Council 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 CEH exam.