200-201 Security Monitoring Practice Question
A NetFlow analysis shows that a single internal IP sent 10 GB of data to an external IP within one hour, whereas the baseline for that host is typically 100 MB per day. Which type of activity does this indicate?
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
✓
Data exfiltration
A sudden large volume of outbound data from a host that normally sends little is a classic indicator of 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.
- ✗
Denial of service attack
Why it's wrong here
DoS would target the internal host, not send data out.
- ✗
Network scanning
Why it's wrong here
Scanning typically involves many small packets, not high volume.
- ✗
Normal business activity
Why it's wrong here
The volume is far above baseline, so it's abnormal.
- ✓
Data exfiltration
Why this is correct
Unusually high outbound data volume suggests stealing data.
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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.