Detective controls are designed to identify and alert when security incidents occur or anomalies are detected, which includes monitoring network communications for suspicious activities. Preventive controls, as their name implies, aim to stop incidents from occurring, but they may not have alerting capabilities. Corrective controls are actions taken to repair the damage or restore systems after a security event, not to identify or detect them. Deterrent controls aim to discourage potential attackers but are not inherently designed for detecting anomalies within network communications.