Page 271 - CISSO_Prep_ Guide

• Recommended humidity: 50% +/-
10%.
• Humidity too high: condensation.
• Humidity too low: static electricity.
• The temperature should be 70-75F.
Remember, the temperature inside
the computer is about 30 degrees
higher than outside the computer.
• Perimeter security:
• Includes fences, layered, natural,
landscaping, gates, bollards, sensors,
CCTV.
• Sensors types
▪ Photoelectric
▪ Ultrasonic – sounds
▪ Microwave
▪ Passive infrared (PIR)
▪ Pressure-sensitive
▪ Capacitance – senses changes
in the electrical field of a tightly
monitored area.
▪ Acoustical/seismic sensors –
sounds or vibrations.
• CCTV:
▪ Not recommended for wireless
LANs
▪ Considerations:
• PTZ: pan, tilt, and zoom
• Transmission media
consideration: coax
cable can cause