What is perimeter security?

Perimeter security refers to the measures and systems put in place to protect the outer boundary of a property, facility, or network from unauthorized access or intrusion. This can include physical barriers like fences and gates, electronic systems such as surveillance cameras and motion detectors, and cybersecurity controls for digital environments. The goal is to detect, deter, and delay potential threats before they can reach critical assets inside the secured area. Effective perimeter security is often a combination of physical and technological solutions tailored to the specific risks of a site.