A security information and event management (SIEM) system is a type of detective control because it monitors and analyzes the security events or logs from different sources or systems, and detects any anomalies or incidents that may indicate a security breach or compromise. A preventive control is a type of control that prevents or blocks any unauthorized or malicious activity or access from occurring. A deterrent control is a type of control that discourages or warns any potential attackers or intruders from attempting any unauthorized or malicious activity or access. A corrective control is a type of control that restores or repairs any damage or disruption caused by an unauthorized or malicious activity or access. References: https://www.isaca.org/resources/isaca-journal/issues/2017/volume-6/the-value-of-penetration-testing https://www.isaca.org/resources/isaca-journal/issues/2016/volume-5/security-scanning-versus-penetration-testing