An organization wants to define as physical perimeter. What primary device should be used to accomplish this objective if the organization's perimeter MUST cost- efficiently deter casual trespassers?
An organization wants to define as physical perimeter. What primary device should be used to accomplish this objective if the organization's perimeter MUST cost- efficiently deter casual trespassers?
Fences three to four feet high are sufficient to deter casual trespassers. This height provides a simple and cost-effective barrier that discourages unauthorized entry without the significant expense associated with taller fences or additional security features like barbed wire, painted gates, or security guards. The primary goal here is to deter rather than prevent determined intruders, making a 3-4 foot fence the most suitable option for the specified requirements.
3-4 feet deters casual trespassers. 6-7 feet too high to climb — may block vision. 8 feet with 3 strands of barbed wire will deter determined intruders and is generally considered as the standard height and configuration.
A is correct
I know A seems the obvious answer as per OSG, but the keyword is "cost-effective" A. Fences three to four feet high with a turnstile - did you consider the cost of the turnstile? B. Fences six to seven feet high with a painted gate - did you consider the cost of a painted gate? C. Fences accompanied by patrolling security guards - an easy one, they are expensive! D. Fences eight or more feet high with three strands of barbed wire - this solves the purpose and won't cost compared to A & B
Understand your intent here about noticing the additional cost of the turnstile and painted door, but how severely is the turnstile or the painted door going to violate cost effectiveness compared to the additional cost of erecting an eight foot fence with barbed wire (2x the height/material) around the same length physical perimeter?
100% agree with you. I'd go with what the OSG says and if its wrong then thats on ISC for a very poorly worded question/answers.
OSG Various types of fences are effective against different types of intruders: ✓ ■ Fences 3 to 4 feet high deter casual trespassers. ✓ ■ Fences 6 to 7 feet high are too hard to climb easily and deter most intruders, except determined ones. ✓ ■ Fences 8 or more feet high with strands of barbed or razor wire deter even determined intruders.
security guards, it is not cost-efficintly , the answer should be D
...casual deterrent..
Turnstile is not cost effective and should be installed in the building.
the examiner is asking for option D, and we will provide hom with the option. However i do not agree in full, consider this, trees can be climbed, all you need is a rope and you are in the premises, all i am saying is that this may not be the best solution even with eight feel high, something to think about
it's A
Agreed, A is the answer
Fences 2-to-3 feet high can be easily crossed and would not be considered a deterrent. 3-to-4 foot fence will deter only casual. 5-to-7 feet high are considered more difficult to climb than a shorter fence. 8 feet high should be used to deter a determined intruder.
Unless your trespasser is a midget a 3-4 foot fence wouldn't deter anyone. I'd go with D
"MUST COST-EFFICIENTLY DETER CASUAL TRESPASSERS" https://resources.infosecinstitute.com/certification/cissp-perimeter-defenses/#:~:text=Different%20heights%20provide,deters%20casual%20trespassers.
For a causal trespasser, 3-4 feet should be enough. Source: https://resources.infosecinstitute.com/certifications/cissp/cissp-perimeter-defenses/ Different heights provide varying degrees of protection 3-4 feet deters casual trespassers. 6-7 feet too high to climb — may block vision. 8 feet with 3 strands of barbed wire will deter determined intruders and is generally considered as the standard height and configuration.
Answer A) Question stated "casual trespassers".
This would also depend on linear size of the gate. A massive campus with that is 10000 acres with barbed wire and a taller fence would cost significantly more than one turnstile and a gate half the size. A causal trespasser who sees any fence, by definition would be deterred by an obstacle.