350-701 Network Security Practice Question
Which of the following is a characteristic of anomaly-based intrusion detection compared to signature-based detection?
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
✓
Higher false positive rate
Anomaly-based detection baselines normal behavior and flags deviations, which can lead to higher false positives because legitimate variations may be flagged. Signature-based detection has lower false positives but cannot detect unknown attacks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Lower false negative rate for known attacks
Why it's wrong here
Signature-based detection is better for known attacks. Anomaly-based can miss known attacks if they resemble normal behavior.
- ✓
Higher false positive rate
Why this is correct
Anomaly-based detection often generates more false positives because any deviation from baseline is flagged.
- ✗
Cannot detect zero-day attacks
Why it's wrong here
Anomaly-based can detect zero-day attacks as they deviate from baseline.
- ✗
Requires frequent signature updates
Why it's wrong here
Signature-based requires updates; anomaly-based relies on baselines.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-701 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 350-701 exam.