A water utility’s OT network for pumps and PLCs was flatly trusted to the IT business network so billing apps could read meter data. Which segmentation approach is most appropriate?
Select an answer to reveal the explanation.
Short Explanation
Water pumps shouldn’t sit on the same trust island as someone’s email inbox. Build a fence between OT and IT, then cut a small, watched gate for the meter data you actually need—not a wide-open hallway to the PLCs.
Full Explanation
OT/IT segmentation limits blast radius from business-network compromise into safety- and availability-critical control systems. Controlled conduits allow required telemetry such as meter reads while blocking broad interactive and lateral access. Flat trust or Internet-only boundaries fail to address the internal path between enterprise IT and industrial networks emphasized in CISSP communication security design.