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Of the types of IDS shown below, which uses an expert system to detect potential attacks?
Signature Based
Expert based
Anomaly Based
Rule Based
A rule based IDS uses an expert system and accompanying rule database to define actions that would constitute an attack. An anomaly based IDS is trained to recognize what normal traffic looks like. It then alerts about any traffic that exceeds the pre-defined pattern. A signature based IDS compares traffic against a list of characteristics of previously seen attacks. It will alert any matches. Expert based isn't a type of IDS.
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