Where is it best to position an intrusion system's control unit?

Positioning an intrusion system's control unit securely is crucial for maintaining the integrity and effectiveness of the security system. By placing the control unit in an area that is secure under all conditions, you reduce the risk of unauthorized access or tampering. The control unit is responsible for managing the entire intrusion detection system, processing alerts, and potentially controlling response measures. If it is easily accessible to intruders or in a location that lacks surveillance, it could compromise the overall security protocols.

A secure location for the control unit ensures that only authorized personnel can interact with it, thereby protecting critical components like configuration settings and alarm response procedures. This is particularly important because any compromise of the control unit could lead to a failure in detecting breaches or responding to security events appropriately. Hence, option B reflects best practices in the design and implementation of intrusion detection systems.