Key Components of an Effective OT Network Architecture

This Dragos and SANS ICS blog post provides an overview of OT network architecture using the Purdue Model, describes key OT components (PLCs, RTUs, ICS, DCS, HMIs, SCADA, IIoT), highlights security challenges from IT‑OT convergence, and recommends five critical OT security controls: an OT‑specific incident response plan, defensible architecture, ICS network visibility and monitoring, secure remote access, and risk‑based vulnerability management.