In the context of security control types, which of the following BEST describes the primary purpose of an Intrusion Detection System (IDS)?
Preventive control
Detective control
Deterrent control
Corrective control
An Intrusion Detection System monitors network or host activity and generates alerts when suspicious behavior is detected. Because it identifies potential incidents rather than blocking or remediating them, it is categorized as a detective control. Preventive controls (e.g., firewalls) attempt to stop incidents, corrective controls focus on recovery, and deterrent controls primarily discourage attackers.
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