This article outlines foundational topics related to network security including converged networks, zone and conduit definitions, segmentation, and perimeter defences. It also emphasizes the importance of ongoing monitoring and tailored cloud security practices. Together, these foundational measures help build a resilient and secure OT network architecture.

The article stresses that a foundational OT cybersecurity policy is crucial for any OT cybersecurity program, outlining the scope, assets, risk levels, enforcement processes, compliance requirements, and roles. It highlights the use of industry frameworks for OT and emphasizes the importance of clear communication and adherence across all organizational levels, including vendors.