Physical security - is the protection of corporate assets from threats such as unauthorized entry, theft or damage., Prevention - is taking the steps necessary to avert unauthorized access, theft, damage, or other type of security breach., Detection - is identifying that a security breach has happened or is happening., Recovery - is the process of returning a system to a functional state and repairing any damage., Access list - personnel who are authorized to enter a secure facility, Mantrap - A specialized entrance with two locking doors that create a security buffer zone between two areas., Turnstile - A barrier that permits entry in only one direction., Double-entry door - has two doors that are locked from the outside but have crash bars on the inside that allow easy exit., Bollard - are short, sturdy posts used to prevent a vehicle from crashing into a secure area., Smart card - Access cards that have encrypted access information. Smart cards can be contactless or require contact., Proximity card - also known as radio frequency identification (RFID) cards, are a subset of smart cards that use the 125 kHz frequency to communicate with proximity readers., Biometric Locks - increase security by using fingerprints or iris scans. They reduce the threat from lost keys or cards., Perimeter barriers - The first measure in physically securing a building is to secure the perimeter and restrict access to secure entry points., Closed-Circuit Television  - can be used as both a preventative tool (when monitoring live events) or as an investigative tool (when events are recorded for later playback)., Physical access logs - are implemented by the guards of a facility and require everyone gaining access to the facility to sign in., Physical access controls - can be implemented inside the facility, and can include key fobs, swipe cards, an anti-passback system or badges along with sensors and alarms to detect unauthorized access.,

3.1 Physical Security

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