The answer is dnsenum and dnsrecon. Both tools are specifically designed for DNS zone transfer enumeration, leveraging the AXFR query to request a complete copy of a nameserver’s zone file from a misconfigured DNS server that allows transfers from any host. Dnsenum automates this process along with subdomain brute-forcing and reverse lookup, while dnsrecon offers similar functionality with additional options for SRV record enumeration and DNSSEC testing. On the Certified Ethical Hacker CEH exam, this question tests your understanding of DNS reconnaissance techniques and the risk of misconfigured zone transfers, often appearing as a multiple-select item where tools like nslookup or dig are distractors because they can manually request a zone transfer but are not dedicated enumeration tools. A common trap is confusing general DNS query tools with purpose-built enumeration suites. Memory tip: think “enum” for enumeration—both dnsenum and dnsrecon contain “en” in their names, reminding you they are built for zone transfer reconnaissance.
CEH Footprinting, Reconnaissance and Scanning Practice Question
This CEH practice question tests your understanding of footprinting, reconnaissance and scanning. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 wants to perform DNS zone transfer enumeration. Which TWO of the following tools can be used for this purpose? (Select exactly 2.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
dnsrecon
Dnsrecon is a dedicated DNS enumeration tool that supports zone transfer requests (AXFR queries) to retrieve all DNS records from a nameserver if it is misconfigured to allow transfers from any host. It can also perform other DNS reconnaissance tasks such as SRV record enumeration and subdomain brute-forcing, making it a direct choice for zone transfer enumeration.
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.
✗
Shodan
Why it's wrong here
Shodan scans internet-connected devices, not DNS zone transfers.
✗
Maltego
Why it's wrong here
Maltego is an OSINT tool that uses transforms but does not directly perform zone transfers.
✗
theHarvester
Why it's wrong here
theHarvester does not perform DNS zone transfers; it gathers info from public sources.
✓
dnsrecon
Why this is correct
dnsrecon can perform zone transfers as part of its enumeration.
Related concept
Read the scenario before looking for a memorised answer.
✓
dnsenum
Why this is correct
dnsenum is a DNS enumeration tool that attempts zone transfers.
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 passive reconnaissance tools (theHarvester, Maltego) and active DNS enumeration tools (dnsrecon, dnsenum) that directly query DNS servers for zone transfers, leading candidates to select tools that gather DNS data indirectly rather than performing the actual AXFR request.
Detailed technical explanation
How to think about this question
DNS zone transfer (AXFR) is defined in RFC 1034 and RFC 5936, allowing a secondary DNS server to replicate the entire zone file from a primary server. A misconfigured nameserver that permits AXFR from any IP (e.g., using 'allow-transfer { any; };' in BIND) exposes all hostnames, IPs, and service records, which is a critical information disclosure vulnerability. Tools like dnsrecon and dnsenum automate the AXFR query and parse the full zone data, often revealing internal network structures not intended for public visibility.
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: dnsrecon — Dnsrecon is a dedicated DNS enumeration tool that supports zone transfer requests (AXFR queries) to retrieve all DNS records from a nameserver if it is misconfigured to allow transfers from any host. It can also perform other DNS reconnaissance tasks such as SRV record enumeration and subdomain brute-forcing, making it a direct choice for zone transfer enumeration.
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.
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. A penetration tester receives the following output from a tool: 'Starting dnsrecon.py -d example.com -t axfr' and then a list of all DNS records. Which of the following BEST describes what occurred?
medium
A.A DNSSEC validation check was completed
✓ B.A successful DNS zone transfer was performed, revealing all DNS records for the domain
C.A DNS cache snooping attack was executed
D.A reverse DNS lookup was performed to find domain names from IP addresses
Why B: The output shows the dnsrecon tool being run with the '-t axfr' option, which specifically requests a DNS zone transfer (AXFR). A zone transfer is a mechanism for replicating DNS databases across DNS servers, and if misconfigured, it allows an attacker to retrieve all DNS records for a domain. The successful listing of all DNS records confirms that the zone transfer was permitted by the target's DNS server, revealing the entire DNS zone.
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Question Discussion
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