The Purdue Model in Practice Versus on Paper

<p>The Purdue model is a layered way to describe an industrial network, from the process at Level 0 up to the enterprise at Level 5. Real plants blur it. The fix that follows the model is an industrial DMZ at Level 3.5, with nothing on the business side opening a session into the plant.</p> <p>The levels, briefly. Level 0 is sensors and actuators. Level 1 is controllers such as PLCs and RTUs. Leve

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