Page 700 - (ISC)² CISSP Certified Information Systems Security Professional Official Study Guide

Fire prevention, detection, and suppression must not be overlooked.
Protecting personnel from harm should always be the most important

goal of any security or protection system. In addition to protecting
people, fire detection and suppression is designed to keep damage
caused by fire, smoke, heat, and suppression materials to a minimum,
especially as regards the IT infrastructure.

Standard fire prevention and resolution training involve knowledge of
the fire triangle (see Figure 10.2). The three corners of the triangle

represent fire, heat, and oxygen. The center of the triangle represents
the chemical reaction among these three elements. The point of the
fire triangle is to illustrate that if you can remove any one of the four
items from the fire triangle, the fire can be extinguished. Different
suppression mediums address different aspects of the fire:

Water suppresses the temperature.

Soda acid and other dry powders suppress the fuel supply.

CO suppresses the oxygen supply.
2

Halon substitutes and other nonflammable gases interfere with the
chemistry of combustion and/or suppress the oxygen supply.