The correct answer is that the `whois example.com` command is most likely used to obtain domain registration details such as the registrar, creation date, and contact information. This is because the WHOIS protocol queries a database maintained by Regional Internet Registries or domain registrars, returning publicly available metadata about the domain’s ownership and administrative structure. On the Certified Ethical Hacker CEH exam, this technique is tested as a core footprinting and reconnaissance step, where you must distinguish WHOIS from other tools like `nslookup` or `traceroute`. A common trap is confusing WHOIS with DNS record lookups—remember that WHOIS reveals the domain’s registration history and owner, not its IP address or mail server. To recall this, think of WHOIS as the “birth certificate” of a domain: it tells you who registered it, when it was born, and when it expires.
CEH Footprinting, Reconnaissance and Scanning Practice Question
This CEH practice question tests your understanding of footprinting, reconnaissance and 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 junior penetration tester runs the command: whois example.com. What type of information are they MOST likely trying to obtain?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Domain registration details such as registrar, creation date, and contact information
The `whois` command queries a WHOIS server (typically operated by a Regional Internet Registry or domain registrar) to retrieve domain registration details. This includes the registrar name, creation and expiration dates, name servers, and often administrative/technical contact information. It is a core footprinting technique used to gather publicly available metadata about a domain owner and infrastructure.
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.
WHOIS may provide name servers, but the IP address is typically obtained via DNS resolution, not directly from WHOIS.
✗
Open ports on the target server
Why it's wrong here
Port scanning is active reconnaissance; WHOIS does not provide port information.
✓
Domain registration details such as registrar, creation date, and contact information
Why this is correct
WHOIS returns domain registration information, which is useful for footprinting.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
EC-Council often tests the distinction between WHOIS (domain registration metadata) and DNS lookups (IP resolution), leading candidates to mistakenly associate WHOIS with IP addresses or server configuration details.
Detailed technical explanation
How to think about this question
WHOIS queries use TCP port 43 (or web-based gateways) to retrieve structured data from RIR databases (ARIN, RIPE, APNIC, etc.) or registrar WHOIS servers. The output often includes registrar abuse contact details, which can be leveraged for social engineering or to identify hosting providers. In real-world recon, WHOIS data can reveal hidden subdomains or historical IP addresses via the creation date and name server changes.
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 practitioner preparing for the CEH exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CEH question in full detail.
Footprinting, Reconnaissance and Scanning — This question tests Footprinting, Reconnaissance and Scanning — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Domain registration details such as registrar, creation date, and contact information — The `whois` command queries a WHOIS server (typically operated by a Regional Internet Registry or domain registrar) to retrieve domain registration details. This includes the registrar name, creation and expiration dates, name servers, and often administrative/technical contact information. It is a core footprinting technique used to gather publicly available metadata about a domain owner and infrastructure.
What should I do if I get this CEH 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: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which THREE of the following are common techniques used during the footprinting phase? (Choose three.)
medium
A.Exploitation
B.Port scanning
✓ C.WHOIS lookup
✓ D.Google hacking
✓ E.DNS zone transfer
Why C: 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. This information is publicly available and helps attackers map an organization's digital footprint without direct interaction with the target.
Last reviewed: Jun 30, 2026
Question Discussion
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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.
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