Which type of security controls helps to detect unauthorized actions within a facility?

Detective controls are specifically designed to identify and alert to unauthorized actions within a facility. These controls focus on detecting any security breaches or anomalies after they occur, enabling organizations to respond appropriately to incidents as they happen or shortly thereafter. Examples of detective controls include surveillance cameras, alarm systems, and intrusion detection systems, which monitor for unauthorized access or deviation from normal operations. By implementing these controls, an organization can gain insights into security incidents, allowing for timely responses and helping to mitigate damage.

In contrast, preventative controls aim to stop incidents before they occur, such as access controls and training programs. Corrective controls are used after a security incident to rectify damages and prevent future occurrences, while deterrent controls are designed to discourage potential attackers, such as security signage or visible security personnel. Each control type serves its unique purpose, but when it comes to detecting unauthorized actions, detective controls are the most relevant.