Best Intrusion Detection and Prevention Systems in 2026

What Are Intrusion Detection and Prevention Systems (IDPS)?

An Intrusion Detection and Prevention System (IDPS) is a security solution used to monitor networks or hosts for malicious activity, policy violations, or unauthorized access and optionally take action to block or prevent the threat. It acts as a security guard that not only watches for suspicious behavior but can also stop intruders in real time. ...