Which technology is designed to detect unauthorized access attempts around airport boundaries?

• A. Video Wall
• B. Fire Alarm
• C. Access Cards
• D. Perimeter Intrusion Detection Systems (PIDS)

Answer: (D)

Perimeter protection requires real-time detection of breaches around the boundary. Perimeter Intrusion Detection Systems are built to sense and alert on unauthorized attempts to cross or breach an airport’s outer edge. They use a mix of sensors—fence-mounted detectors, buried fiber, infrared, radar, seismic, or acoustic devices—that feed into security operators so they can respond quickly. This is why this option fits best: it’s dedicated to monitoring the boundary itself and generating alarms for any intrusion, not just recording video or controlling access at gates.

Video walls are display tools for monitoring feeds, so they don’t detect intrusions by themselves. Fire alarms detect fires, not unauthorized boundary breaches. Access cards manage entry at fixed points, but they don’t continuously surveil or detect breaches along the entire perimeter.