Correct Answer: B
Explanation/Reference:
Explanation:
An IDS can detect malicious behavior using two common methods. One way is to use knowledge-based detection which is more frequently used. The second detection type is behavior-based detection.
Incorrect Answers:
A: behavior-based detection is less common compared to knowledge-based detection.
C: A Statistical anomaly-based IDS is a behavioral-based system.
D: Host-based intrusion detection is not a conceptual iDS approach. The two conventional approaches are knowledge-based detection and behavior-based detection.
References:
Stewart, James M., Ed Tittel, and Mike Chapple, CISSP: Certified Information Systems Security Professional Study Guide, 5th Edition, Sybex, Indianapolis, 2011, p. 56