Common Problems with Vibration Detection Devices for Perimeter Control

A.

Vibration sensors are similar and are also implemented to detect forced entry.

Financial institutions may choose to implement these types of sensors on exterior walls, where bank robbers may attempt to drive a vehicle through.

They are also commonly used around the ceiling and flooring of vaults to detect someone trying to make an unauthorized bank withdrawal.

Such sensors are proned to false positive.If there is a large truck with heavy equipment driving by it may trigger the sensor.The same with a storm with thunder and lighting, it may trigger the alarm even thou there are no adversarial threat or disturbance.

The following are incorrect answers: All of the other choices are incorrect.

Reference used for this question: Harris, Shon (2012-10-18)

CISSP All-in-One Exam Guide, 6th Edition (pp.

495-496)

McGraw-Hill

Kindle Edition.

Vibration detection devices are used in perimeter control to detect any attempts at intrusion or tampering with the perimeter. These devices work by detecting any vibrations or movement in the ground or structure of the perimeter, and triggering an alarm or alert when such movements are detected. However, there are several common problems associated with the use of vibration detection devices for perimeter control.

One common problem is that vibration detection devices are vulnerable to non-adversarial disturbances. These disturbances can include natural phenomena such as earthquakes, heavy winds, or heavy rain, which can cause false alarms or trigger the system unnecessarily. Additionally, activities such as construction work or heavy traffic in the vicinity of the perimeter can also cause false alarms, which can lead to the system being ignored or deactivated.

Another common problem is that vibration detection devices can be defeated by electronic means. Attackers can use jamming devices or other electronic countermeasures to disrupt the signals sent and received by the vibration detection devices. This can render the system ineffective and allow intruders to penetrate the perimeter undetected.

Signal amplitude is also affected by weather conditions, which can lead to false alarms or missed detections. For example, heavy rain or snow can cause the ground to vibrate, which can trigger the alarm even if there is no intrusion. Conversely, very dry or hot conditions can cause the ground to become very hard, which can reduce the sensitivity of the system and make it more difficult to detect intrusions.

Lastly, some vibration detection devices must be buried below the frost line, which is the depth below the ground that is affected by freezing temperatures. This can be a challenge in areas with deep frost lines, where it may be difficult or impractical to install the system.

Overall, while vibration detection devices can be an effective tool for perimeter control, it is important to be aware of the potential problems associated with their use and to take steps to mitigate these risks.