Which technology is frequently employed for surveillance in security?

Surveillance cameras and alarms are essential technologies in the field of security, widely utilized for monitoring and protecting properties and individuals. These tools provide visual oversight and are critical in deterring or recording criminal activity. Surveillance cameras, for example, can capture real-time footage, which can be invaluable for investigations, while alarms alert security personnel or law enforcement to any unauthorized access or suspicious behavior. Together, they create a comprehensive security system that not only monitors premises but also enhances response capabilities in the event of an incident.

Other options, while important in their roles, serve different functions; radio communication devices facilitate communication among security personnel, portable metal detectors are used for screening individuals for weapons, and access control systems manage entry to restricted areas. However, it is the integration of surveillance cameras and alarms that forms the backbone of many security operations, making them the most frequently employed technology for surveillance.