200-201 Network Intrusion Analysis Practice Question
Which TWO of the following are typical indicators of a C2 beaconing communication?
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
✓
Regular intervals of communication at consistent times
C2 beaconing often involves regular periodic callbacks and communications to unusual domains. These patterns help attackers maintain persistence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Regular intervals of communication at consistent times
Why this is correct
Beaconing often uses fixed intervals to check in with C2 server.
- ✗
Large outbound data transfers to an external IP
Why it's wrong here
Large transfers indicate exfiltration, not beaconing.
- ✗
Multiple failed login attempts from a single source
Why it's wrong here
Failed logins indicate brute force, not C2.
- ✗
ICMP echo requests to multiple hosts
Why it's wrong here
ICMP scanning is reconnaissance.
- ✓
DNS queries for domains that are rarely visited
Why this is correct
Unusual domains can be part of DGA or C2 infrastructure.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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