Page 710 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

FIGURE 10.4 A secure physical boundary with a mantrap and a
turnstile

A mantrap is a double set of doors that is often protected by a guard

(also shown in Figure 10.4) or some other physical layout that
prevents piggybacking and can trap individuals at the discretion of
security personnel. The purpose of a mantrap is to immobilize a
subject until their identity and authentication is verified. If a subject is
authorized for entry, the inner door opens, allowing entry into the

facility or onto the premises. If a subject is not authorized, both doors
remain closed and locked until an escort (typically a guard or a police
officer) arrives to escort the subject off the property or arrest the
subject for trespassing (this is called a delay feature). Often a mantrap
includes a scale to prevent piggybacking or tailgating.

Another key element of physical security, especially for data centers,
government facilities, and highly secure organizations, is security

bollards, which prevent vehicles from ramming access points. These
can be permanently fixed in place or automatically rise from their