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  2. Perimeter security - Wikipedia

    en.wikipedia.org/wiki/Perimeter_security

    Both natural and manmade barriers can serve as perimeter security. [1] Governments use perimeter security not only for the safety of their citizens, but to control the flow of commerce and immigration, as well as to protect vital infrastructure from attackers. Property owners and organizations of all sizes use various man-made technology to ...

  3. Physical security - Wikipedia

    en.wikipedia.org/wiki/Physical_security

    Physical security involves the use of multiple layers of interdependent systems that can include CCTV surveillance, security guards, protective barriers, locks, access control, perimeter intrusion detection, deterrent systems, fire protection, and other systems designed to protect persons and property.

  4. Perimeter intrusion detection - Wikipedia

    en.wikipedia.org/wiki/Perimeter_intrusion_detection

    A fence-mounted perimeter intrusion detection system installed on a chain link fence. A perimeter intrusion detection system ( PIDS ) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area.

  5. Geofence - Wikipedia

    en.wikipedia.org/wiki/Geofence

    Two geofences defined in a GPS application. A geofence is a virtual "perimeter" or "fence" around a given geographic feature. [1] A geofence can be dynamically generated (as in a radius around a point location) or match a predefined set of boundaries (such as school zones or neighborhood boundaries).

  6. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.

  7. At the edge of the UN security perimeter, those with causes ...

    www.aol.com/news/edge-un-security-perimeter...

    Here are some glimpses of those outside the formidable security perimeter at the U.N. General Assembly — their causes, their thoughts, their motivations, their hopes of getting noticed. CAUSE ...

  8. Category:Perimeter security - Wikipedia

    en.wikipedia.org/wiki/Category:Perimeter_security

    Outdoors mechanical and/or electronic systems conceived to protect the external perimeter of a facility. Usually applied in Homeland Security and other private high risk facilities. Subcategories

  9. Perimeter fence - Wikipedia

    en.wikipedia.org/wiki/Perimeter_fence

    Vertical bar fencing has been the most popular form of perimeter security fence since the 1980s. Since the 2000s, welded wire mesh and acoustic barriers have also become popular types of perimeter fence around the world. Vertical bar, acoustic barriers and welded mesh are used in commercial projects and landmarks, [1] and transport hubs. [2]