The need to connect industrial control networks to the IT environment, cloud applications and remote workers is eroding the air gap created by the demilitarized zone. To keep digitizing their industrial operations, organizations must deploy new ways to secure operational technology (OT) networks. The first step to securing an IoT/OT network is obtaining visibility. Understanding what devices are on the network, what they are communicating and where those communications are going is key to implement security best practices, build the right security policies.”]
Source: https://www.cuinfosecurity.com/blogs/securing-industrial-iot-its-all-about-architecture-p-3050