What You Will Learn in This ICS Course
- Explain what ICS is and how its design priorities differ from standard IT systems
- Map the five levels of the Purdue Model and place any ICS component within it
- Distinguish between PLC, HMI, SCADA, DCS, and RTU by function and where each sits in the architecture
- Trace the path of a sensor reading from a field device through to an enterprise system
- Name the major industrial communication protocols and explain what problem each was built to solve
- Describe how industrial networks differ from IT networks in timing, failure tolerance, and physical environment
- Identify the structural gaps in ICS architecture that make cybersecurity a distinct engineering challenge
- Enter the paid ICS/OT Cybersecurity Fundamentals course with the foundation it assumes you already have
Requirements
- No prior knowledge of industrial systems required
- A general technical background in engineering, IT, or operations is helpful but not required
What This Free ICS Course Covers
You work in engineering, IT, or a technical role and industrial control systems keep coming up. In job postings, in meetings with OT colleagues, in documentation you are expected to understand. You know your own domain. But when the conversation turns to PLCs, SCADA, or OT networks, you are reasoning from the edges of what you actually know. ICS has its own language, its own priorities, and its own logic, and there has never been a convenient place to pick up the basics without formal training.
This course covers three areas: what ICS is, the components that make it up, and the industrial networks it runs on. Each section builds on the one before it. You will leave knowing what a control system is, how its components connect, and why the engineering decisions made decades ago still shape the security problems that OT teams deal with today.
The course is free because the foundation layer of ICS knowledge should not sit behind a paywall. It is the prerequisite that most ICS cybersecurity training assumes you already have.
If you want to go further, the paid ICS/OT Cybersecurity Fundamentals course on Udemy picks up exactly where this one ends, covering the threat landscape, IEC 62443, zone and conduit design, and incident response for environments where availability comes before everything else.
This Course Includes
- 25 on-demand lectures
- 1h 34m of video
- Free access, no payment required
- Self-paced, learn on your own schedule
- 6 quizzes to check your understanding
Who This Course Is For
- IT professionals moving into OT or operational technology roles who need a working understanding of what they will be securing
- Engineers handed cybersecurity responsibility who need the ICS vocabulary before tackling security standards or frameworks
- Students building toward ICS cybersecurity roles who want a solid foundation before taking paid training
- Project managers and consultants who work alongside OT teams and need to follow technical discussions without guessing
Course Curriculum
What the course covers, who it is for, and what you will be able to do by the end
The four parts of the course and how each one builds on the last
What industrial control systems are, and where you have already met one without noticing
Why availability and safety outrank confidentiality on a plant floor, and what that changes
Power, water, oil and gas, manufacturing and transport, and what each demands of its control system
The five levels, what lives at each, and how to place any component you meet
What happens to a physical process when a controller stops, and why patching is not a weekend job
A shift seen from the operator's chair, from alarm through to response
The questions this course deliberately leaves open, and where they get answered
How a programmable logic controller reads inputs, runs its logic, and drives outputs
The screen an operator actually works from, and what it does and does not show them
How supervisory control gathers data across many sites and presents it in one place
Where a distributed control system fits, and how it differs from SCADA in practice
Sensors, actuators and remote terminal units at the edge of the process
Where the control logic is written, and where the process data is kept
Tracing one sensor reading from the field device all the way to an enterprise system
The structural gaps that fall out of the architecture itself, before any attacker appears
Timing, determinism and failure tolerance, and where office networking assumptions break
What Modbus was built to do, and the assumptions baked into it that still matter
What changed when industrial systems moved onto Ethernet, and what came with it
How OPC bridges the plant floor to the business network, and why that bridge matters
How industrial networks are laid out, and why the layout is a security question
The baseline you need before anything abnormal can stand out
Where this foundation leads, and what a cybersecurity course will assume you know
A short close, and what to do next
- 25 on-demand lectures
- 1h 34m of video
- Free access
- Self-paced