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Petar Cubela
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## Introduction
An _Intrusion Detection System_ (IDS) watches network traffic for suspicious patterns and can alert operators when a pattern matches a database of known behaviors.
An _Intrusion Prevention System_ (IPS) goes a step further by inspecting each packet as it traverses a network interface to determine if the packet is suspicious in some way. If it matches a known pattern the system can drop the packet in an attempt to mitigate a threat.