ISC2 Exam ISSAP Topic 3 Question 74 Discussion

enforce one-way traffic of people, and in addition, it can restrict passage only to people who insert a coin, a ticket, a pass, or similar. Thus, a

turnstile can be used in the case of paid access.

Answer option D is incorrect. A fence is a perimeter-defining device. It differentiates between those locations that are under some specified

security protection and those that are not under any security protection. Fencing contains various components, materials, and construction

methods. It also includes stripes painted on the ground, barbed wires, chain link fences, concrete walls, and some invisible perimeters in

which laser, motion, and heat detectors are used.

Answer option A is incorrect. Biometrics is a method of authentication that uses physical characteristics, such as fingerprints, scars, retinal

patterns, and other forms of biophysical qualities to identify a user. Nowadays, the usage of biometric devices such as hand scanners and

retinal scanners is becoming more common in the business environment.

Answer option B is incorrect. A man-trap in modern physical security protocols refers to a small space having two sets of interlocking doors

such that the first set of doors must close before the second set opens. Identification may be required for each door, and possibly different

measures for each door. For example, a key may open the first door, but a personal identification number entered on a number pad opens the

second. Other methods of opening doors include proximity cards or biometric devices such as fingerprint readers or iris recognition scans.

'Man-traps' may be configured so that when an alarm is activated, all doors lock and trap the suspect between the doors in the 'dead-space'

or lock just one door to deny access to a secure space such as a data center or research lab.