CISSP Physical and Environmental Security

Definitions

Bollard Crash Barrier
Natural Surveillance Create height advantage and secure perimeter
Guard in common access areas and lobbies
Issues selectin a site
- Is it visible
- Distance to emergency services
- Accessibility
- Regional natural desasters

Drop Ceilings could give access to secure rooms
Wireing closets at should be at secure locations
Electromagnetic interference (EMI) , also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.

Voltage spike are fast, short duration electrical transients in voltage (voltage spikes), current (current spikes), or transferred energy (energy spikes) in an electrical circuit.
Brownout is an intentional or unintentional drop in voltage in an electrical power supply system. Intentional brownouts are used for load reduction in an emergency.

Plenum cable is electrical cable that is laid in the plenum spaces of buildings
Halon is a liquefied, compressed gas that stops the spread of fire by chemically
A wet pipe sprinkler system is a sprinkler system employing automatic sprinkler heads attached to a piping system containing water and connected to a water
A dry pipe sprinkler system is a sprinkler system employing automatic sprinkler heads attached to a piping system but not filled with water at the start
A Preaction sprinkler system is a sprinkler system employing automatic sprinkler heads attached to a piping system filled with pressurized air
A deluge fire sprinkler system is similar to a pre-action system except the sprinkler heads are open and the pipe is not pressurized with air. Deluge systems are connected to a water supply through a deluge valve that is opened by the operation of a smoke or heat detection system.