An intrusion prevention system (IPS) functions as an additional layer of filtering for malicious activities. The advantage of an IPS over an IDS is the fact that these are found in-line, at the path of the source and the destination, and can block malicious activities from occurring in the network. An IPS should be efficient so it does not hinder the performance of a network. At the same time, it should be able to act quickly and accurately to catch malicious activities in real time and detect false positives.”]
Source: https://hackercombat.com/what-is-an-intrusion-prevention-system/