Which of the following is used to monitor network traffic or to monitor host audit logs in real time to determine violations of system security policy that have taken place? 

Answer options:

A. Intrusion Detection System
B. Compliance Validation System
C. Intrusion Management System (IMS)
D. Compliance Monitoring System

A

An Intrusion Detection System (IDS) is a system that is used to monitor network traffic or to monitor host audit logs in order to determine if any violations of an organization`s system security policy have taken place. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 48.