HIDS can use various methods of detection. Heuristics or signature based are more like anti-virus products. Network behavior anomaly detection is different. It uses a baseline to compare against current behavior to see if there is something unusual happening that needs attention. Here's more information about intrusion detection systems.

<a href="http://searchsecurity.techtarget.com/definition/HIDS-NIDS">HIDS</a> can use various methods of detection. Heuristics or signature based are more like anti-virus products. Network behavior anomaly detection is different. It uses a baseline to compare against current behavior to see if there is something unusual happening that needs attention. <a href="http://searchmidmarketsecurity.techtarget.com/definition/intrusion-detection">Here's more information about intrusion detection systems</a>.