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CISSP For Dummies, 4th Edition by Peter Gregory, Lawrence Miller

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Physical (Environmental) Security Controls

Physical (environmental) security controls include a combination of physical access controls, technical controls, environmental and life safety controls, fire detection and suppression, and administrative controls.

Physical access controls

Physical access controls consist of the systems and techniques used to restrict access to a security perimeter and provide boundary protection, including fencing, security guards, dogs, locks, storage areas, security badges, and biometric access controls.

Fencing

Fencing is the primary means for securing an outside perimeter or external boundary and an important element of physical security that the CISSP candidate must know for the exam. Fencing provides physical access control and includes fences, gates, turnstiles, and mantraps. The main disadvantages of fencing are cost and appearance. General height requirements for fencing are listed in Table 13-3.

Table 13-3 General Fencing Height Requirements

Height

General Effect

3–4 ft (1m)

Deters casual trespassers

6–7 ft (2m)

Too high to climb easily

8 ft (2.4m) + three-strand barbed wire

Deters more determined intruders

Mantraps

A mantrap is a method of physical access control that consists of a double set of locked doors or turnstiles. The mantrap may be guarded or monitored, may require a different level of access to pass through each door or in a different direction (for example, exit may be permitted at all times, but entry ...

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