Your organization has implemented an intrusion detection system (IDS) that first learns what "normal" network traffic looks like and then triggers an alert whenever current traffic deviates from that established baseline. Which IDS detection method is being used?
Anomaly-based detection trains the IDS with historical "normal" traffic to create a statistical baseline. During operation, every packet flow is compared with that baseline; any significant deviation is treated as a potential intrusion, allowing the system to detect previously unseen or zero-day attacks. Signature-based detection relies on known attack patterns, heuristic detection uses rule-driven or AI logic to judge suspicious behavior, and protocol-based detection inspects compliance with specific protocol standards.
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How does anomaly-based IDS differ from signature-based IDS in functionality?
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What is a zero-day attack, and why is anomaly-based IDS effective against it?
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What are the potential drawbacks of anomaly-based IDS?