Ch10 Flashcards
most common form of perimeter security device
lighting
what kind of motion detector senses changes in electrical or magnetic field surrounding monitored object
capacitance motion detector
Is there such a thing as a Preventative alarm
No, alarms are always triggered in response to a detected intrusion or attack
Can you prevent espionage using physical controls
no
what is the static voltage needed to destroy data on HDD
1500 volts
facility construction site management personnel controls awareness training emergency response and procedures
Administrative - Physical Security Controls
access controls IDS alarms CCTV monitoring HVAC power supplies fire detection & suppression
Technical - Physical Security Controls
fencing lighting locks construction material mantraps dogs guards
Physical - Physical Security Controls
what is the functional order of controls
deter
deny
detect
delay
what are the key elements in site selection for design of a facility
- understanding level of security needed before construction begins
- visibility
- composition of surrounding area
- accessibility
- effects of natural disasters
momentary loss of power
Fault
Momentary low voltage
Sag
Prolonged low voltage
Brownout
Momentary high voltage
Spike
Prolonged high voltage
Surge
An initial surge of power usually associated with connecting to a power source, whether primary or alternate/secondary
Inrush
A steady interfering power disturbance or fluctuation
Noise
A short duration of line noise disturbance
Transient
The wire in an electrical circuit that is grounded
Ground
How many volts to destruction of sensitive circuits and other electronic components
40 volts
How many volts for scrambling of monitor displays
1000
How many volts for abrupt system shutdown
2000
How many volts for printer jam or component damage
4000
How many volts for permanent circuit damage
17000
Is it possible to generate 20,000 volt static discharges even on antistatic carpeting, if the environment has low humidity
Yes
what are four primary stages of fire
Incipent
Smoke
Flame
Heat
What causes most fires in a datacenter
overloaded electrical outlets.
What suppression material is used for class A fire and what type of material is in a Class A fire
water, soda acid
common combustibles
What suppression material is used for class B fire and what type of material is in a Class B fire
CO2, soda acid, Halon
liquids
What suppression material is used for class C fire and what type of material is in a Class C fire
CO2, Halon
electrical
What suppression material is used for class D fire and what type of material is in a Class D fire
dry powder
metal
always full of water. Water discharges immediately when suppression is triggered.
Wet pipe or closed head system
contains compressed air. Once suppression is triggered, the air escapes, opening a water valve that in turn causes the pipes to fill and discharge water into the environment.
dry pipe
uses larger pipes and therefore delivers a significantly larger volume of water. these systems are inappropriate for environments that contain electronics and computers.
deluge system
combination dry pipe/wet pipe system. The system exists as a
dry pipe until the initial stages of a fire (smoke, heat, and so on) are detected, and then the pipes are filled with water. The water is released only after the sprinkler head activation triggers are melted by sufficient heat. If the fire is quenched before sprinklers are triggered, pipes can be manually emptied and reset. This also allows manual intervention to stop the release of water before sprinkler triggering occurs.
preaction system
What are the most appropriate water-based system for environments that house both computers and humans together.
preaction system
Halon substitutes
■ FM-200 (HFC-227ea) ■ CEA-410 or CEA-308 ■ NAF-S-III (HCFC Blend A) ■ FE-13 (HCFC-23) ■ Argon (IG55) or Argonite (IG01) ■ Inergen (IG541)
