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CISSP For Dummies, 4th Edition by Peter Gregory, Lawrence Miller

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Physical Security Threats

Threats to physical security come in many forms, including natural disasters, emergency situations, and man-made threats. All possible threats must be identified in order to perform a complete and thorough risk analysis and develop an appropriate and effective control strategy. Some of the more common threats to physical security include

check.png Fire: Threats from fire can be potentially devastating and lethal. Proper precautions, preparation, and training not only help limit the spread of fire and damage, but more important, can also save lives. Saving human lives is the first priority in any life-threatening situation. Other hazards associated with fires include smoke, explosions, building collapse, release of toxic materials or vapors, and water damage.

For a fire to burn, it requires three elements: heat, oxygen, and fuel. These three elements are sometimes referred to as the fire triangle. (See Figure 13-1.) Fire suppression and extinguishing systems fight fires by removing one of these three elements or by temporarily breaking up the chemical reaction between these three elements (separating the fire triangle). Fires are classified according to the fuel type, as listed in Table 13-1.

Figure 13-1: A fire needs these three elements to burn.

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Table 13-1 ...

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