+Perimeter security involves safeguarding the outer boundary of an area or asset. It establishes an initial line of [Defense](/wiki/defense) against unauthorized entry, often employing physical barriers and [Surveillance](/wiki/surveillance) to deter and detect threats.
+## See also
+- [Access Control](/wiki/access_control)
+- [Physical Security](/wiki/physical_security)
+- [Security System](/wiki/security_system)
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