200-201 Network Intrusion Analysis Practice Question
An analyst is investigating a host that is making outbound HTTPS connections to multiple random-looking domains, each with a short TTL. The domains are not in any threat intelligence feeds. Which technique is most likely being used?
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
✓
Domain Generation Algorithm (DGA)
Domain Generation Algorithms (DGAs) generate many random domain names to evade blocklists. Short TTLs allow fast changes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Domain Generation Algorithm (DGA)
Why this is correct
Correct. DGA generates random domains for C2.
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Beaconing
Why it's wrong here
Beaconing is periodic callbacks but not necessarily to random domains.
- ✗
DNS tunneling
Why it's wrong here
DNS tunneling encodes data in DNS queries, not necessarily many domains.
- ✗
Fast flux DNS
Why it's wrong here
Fast flux changes IPs, not domain names.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 200-201 practice question is part of Courseiva's free Cisco 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 200-201 exam.