Which statement describes the anomaly-based intrusion detection approach?

Which statement describes the anomaly-based intrusion detection approach?

• It compares the antivirus definition file to a cloud based repository for latest updates.
• It compares the behavior of a host to an established baseline to identify potential intrusions.
• It compares the signatures of incoming traffic to a known intrusion database.
• It compares the operations of a host against a well-defined security policy.

Explanation: With an anomaly-based intrusion detection approach, a baseline of host behaviors is established first. The host behavior is checked against the baseline to detect significant deviations, which might indicate potential intrusions.

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