1. IDS/IPS stand for intrusion detection/prevention systems. They’ve been around for 20 years and sit at the perimeter of a network. They rely on prebuilt and continuously updated signatures. If there is a pattern match it will alarm on that signature match. It takes a lot of tuning and might slowdown overall network performance.
2. NDR sits inside the network itself. It monitors East-West, North-South traffic. It is capturing a wealth of metadata which then are submitted to machine learning and artificial intelligence techniques to identify potentially malicious activity. It then sends the user the alerts they can act on. There is no degradation of focus.

You need both IDS/IPS and NDR for a healthy, robust security posture.

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