Episode 8 — Distinguish ICS System Types: DCS, SCADA, SIS, MES, and Localized Control Networks

This episode teaches the differences among major ICS system types so you can correctly reason about architecture, responsibility, and risk when the exam presents a mixed environment. You’ll define DCS and SCADA by control scope and communications patterns, then connect each to typical industries and operational priorities, which often influence availability and safety decisions. We explain Safety Instrumented Systems (SIS) as protective layers designed to move processes to safe states under defined conditions, and why changes to SIS logic and access should be treated as high-risk and tightly governed. MES is covered as the bridge between production operations and business processes, including how it can introduce dependencies, data flows, and change requests that impact both OT and IT teams. You’ll also learn how localized control networks fit into real facilities, why segmentation boundaries matter, and how to troubleshoot exam scenarios by identifying which system type is most likely involved based on symptoms and stakeholders. Produced by BareMetalCyber.com, where you’ll find more cyber audio courses, books, and information to strengthen your educational path. Also, if you want to stay up to date with the latest news, visit DailyCyber.News for a newsletter you can use, and a daily podcast you can commute with.