There are four types of IPS:
Network-based intrusion prevention system (NIPS): The system works at a network level, analyzing incoming traffic across the entire network.
Wireless intrusion prevention system (WIPS): The software monitors and analyzes network protocols across a wireless network.
Network Behavior Analysis (NBA): The system monitors and analyzes network traffic to detect malicious activity like DDoS (distributed denial of service) , malware, and policy violations.
Host-based intrusion prevention system (HIPS): Monitors a single host for malicious activity.