Network intrusion detection system (NIDS)
Also called: NIDS
Course: AP® Cybersecurity Shows up in: Unit 2: Securing SpacesUnit 3: Securing Networks
An automated tool that analyzes network data to determine if malicious activity is happening and generates an alert.
Appears in the course and exam description (CED): 3.5.A.22.1.F.3
Why it matters in Unit 3
It detects and alerts; it does not block.
Example
An alert fires when a device starts scanning hundreds of ports.
Learn it properly, with a checkpoint 3.5 Detecting Network Attacks