Attributes that characterize an attack are stored for reference using which of the following Intrusion Detection System (IDS) ?

Signature-based IDSs maintain a database of specific attack patterns, or 'signatures,' which are characteristic attributes or sequences of events associated with known threats. When network traffic or system logs match one of these predefined signatures, the IDS triggers an alert, indicating a potential intrusion.

Statistical anomaly-based IDSs detect deviations from established baselines of normal network or system behavior, rather than matching against known attack attributes.

Event-based IDS is not a standard classification; all IDSs process events, but this doesn't define the detection methodology.

Inferent-based IDS is not a recognized or standard category for Intrusion Detection Systems.