What is the name for the patrol conducted after a security guard hears glass breaking?

The patrol conducted after a security guard hears glass breaking is referred to as reactive. This term denotes an action taken in response to an event or disturbance that has already occurred. In this context, the breaking of glass is a clear signal that something may be wrong, prompting the security guard to investigate the situation immediately.

Engaging in this type of patrol demonstrates the guard's responsiveness to incidents as they happen, which is crucial in maintaining safety and security. It's essential for security personnel to act swiftly and effectively when they encounter such signals of potential trouble, as this can help prevent further damage or criminal activity.

In contrast, the other options involve different types of patrols. Random patrols are typically conducted at irregular intervals to deter potential threats without a specific trigger. Proactive patrols are planned and implemented to prevent incidents before they happen, and directive patrols would imply a specific instruction or goal guiding the patrol. Each of these alternatives serves a unique purpose in a security context, but they do not specifically address the immediate response required after an incident such as glass breaking.