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Which of the following is not true of IDSs?

Which of the following is not true of IDSs?

PrepAway - Latest Free Exam Questions & Answers

A.
They can be hindered by items within the room.

B.
They are expensive and require human intervention to respond to the alarms.

C.
They usually come with a redundant power supply and emergency backup power.

D.
They should detect, and be resistant to, tampering.

Explanation:
C: Intrusion detection systems do not commonly come with a redundant power supply and emergency backup power. However, these things are necessary.
Without them, an IDS will be inoperable if the main source of power becomes unavailable, leaving assets at risk.
A is incorrect because IDSs can be hindered by items within a room. In fact, the items within the room, as well as the size and shape of the room, may cause
barriers, in which case more detectors are needed to provide the necessary level of coverage.
B is incorrect because IDSs are relatively expensive and they do require human intervention to respond to the alarms. IDSs are used to detect unauthorized
entries and alert a responsible entity to respond. These systems can monitor entries, doors, windows, devices, or removable coverings of equipment. Many work
with magnetic contacts or vibration-detection devices that are sensitive to certain types of changes in the environment. When a change is detected, the IDS device
sounds an alarm either in the local area, or in both the local area and a remote police or guard station.
D is incorrect because IDSs should detect, and be resistant to, tampering. Intruders like to cover their tracks to avoid detection. Obviously, if the IDS can be
disabled or tampered with so that an alarm does not trigger or evidence of an intrusion is destroyed, then the IDS cannot do its job. So an IDS worth its salt should
have its own intrusion prevention mechanisms.

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