In a security system, which component serves as a point of entry monitoring?

In a security system, the component that serves as a point of entry monitoring is the contact. A contact is typically installed on doors and windows and consists of two parts: a magnet and a switch. When the door or window is closed, the magnet keeps the switch closed, allowing the security system to recognize that the entry point is secure. When the door or window opens and the magnet moves away from the switch, it creates an open circuit, triggering an alert in the security system. This functionality is crucial for monitoring access points and detecting unauthorized entry, making it an essential part of entry monitoring in security systems.

The detector refers to devices that identify motion or changes in the environment, such as infrared sensors or glass break sensors, but they do not specifically monitor entry points like contacts do. A zone typically refers to a defined area within a security system that can contain multiple detector devices for broader monitoring. An alert is just an indication of a security event, such as a sound or notification, rather than a component that monitors entry directly.