If you spend time talking to organisations running industrial or operational environments, a pattern quickly emerges. The cyber risk isn’t just growing – it’s growing faster than their ability to see it, understand it, and respond to it.

As more of our professional and personal lives move online, it’s increasingly important to keep our networks secure from potential cyber-attacks and reduce our cyber exposure. One tool that is frequently used for this purpose is a Network Intrusion Detection System (NIDS). But what exactly is NIDS, and how does it work?