Which of the following is NOT a characteristic of a host-based intrusion detection system? 

Answer options:

A. A HIDS does not consume large amounts of system resources
B. A HIDS can analyse system logs, processes and resources
C. A HIDS looks for unauthorized changes to the system
D. A HIDS can notify system administrators when unusual events are identified

A

A HIDS does not consume large amounts of system resources is the correct choice.HIDS can consume inordinate amounts of CPU and system resources in order to function effectively, especially during an event. All the other answers are characteristics of HIDSes A HIDS can: scrutinize event logs, critical system files, and other auditable system resources; look for unauthorized change or suspicious patterns of behavior or activity can send alerts when unusual events are discovered Reference: Official guide to the CISSP CBK. Pages 197 to 198.