312-39 Incident Response Practice Question
You notice an anomaly in your DNS traffic. Which type of DNS record is commonly associated with DNS tunneling for command and control?
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
✓
TXT record
TXT records are commonly used in DNS tunneling to encode data within the record's payload.
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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A record
Why it's wrong here
A records are for basic IP mapping.
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TXT record
Why this is correct
TXT records can store arbitrary string data used for tunneling.
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CNAME record
Why it's wrong here
CNAME is for aliasing.
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MX record
Why it's wrong here
MX is for mail servers.
Visual reference
About these practice questions
Courseiva writes every 312-39 question from scratch — 202 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official EC-Council exam blueprint
This 312-39 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 312-39 exam.