ITPEC FE Subject A October 2025 Question 31
ITPEC FE Subject A October 2025 — Question 31 of 60
IDS (Intrusion Detection System) — identifies the core function of an IDS: monitoring and alerting on intrusions.
An IDS monitors network traffic or server activity and notifies the administrator when it detects an intrusion or policy violation. It is a passive system — it detects and alerts but does not block attacks (blocking is done by an IPS — Intrusion Prevention System).
Why not others:
- (a) Checking whether software is up to date — this describes a patch management or vulnerability scanner function, not IDS.
- (b) Collecting security status info and performing self-diagnosis — this describes a security audit or self-assessment tool (e.g., ISM benchmark), not IDS.
- (d) Sending test data to find vulnerabilities from responses — this describes a fuzzing tool or vulnerability scanner (like a penetration testing tool).
Key rule: IDS = detect & alert; IPS = detect & block.
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