CompTIA Security+ Question C-73

Which of the following are examples of detective controls?

A. Biometrics, motion sensors and mantraps.
B. Audit, firewall, anti-virus and biometrics.
C. Motion sensors, intruder alarm and audit.
D. Intruder alarm, mantraps and firewall.

Answer: C

Detective controls are those that operate afterward so as to discover that has happened. Detective controls include security guards, motion detectors, recording and reviewing of events captured by security cameras or CCTV, job rotation, mandatory vacations, audit trails, honeypots or honeynets, IDSs, violation reports, supervision and reviews of users, and incident investigations.