312-85 Threat Hunting And Detection Practice Question
A threat hunter wants to identify unauthorized DNS tunneling. Which data point is most indicative of this activity?
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
✓
High volume of TXT record queries
Extremely high volumes of TXT or NULL record queries are classic indicators of DNS tunneling for data exfiltration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Low volume of DNS failures
Why it's wrong here
DNS failures are often noisy but not specific to tunneling.
- ✗
High volume of A record queries
Why it's wrong here
A records are normal for standard web traffic.
- ✗
Frequent SRV record updates
Why it's wrong here
SRV records are for service discovery.
- ✓
High volume of TXT record queries
Why this is correct
TXT records are frequently used to carry data in DNS tunneling attacks.
Visual reference
About these practice questions
One of 195 original 312-85 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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 312-85 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 312-85 exam.