CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsEASYFree question
Ladder logic, the classic PLC programming language, derives its visual structure from which earlier technology?
- A.Assembly language listings, which write-protects controller logic through a software flag no attacker can flip
- B.Spreadsheet formulas
- C.Object-oriented class diagrams, which legacy PLC firmware already validates through mandatory secure boot
- D.Relay-based electromechanical control wiring
Why D is correct
Ladder logic mimics the rungs and contacts of relay-based electrical control diagrams, making it intuitive for electricians transitioning to PLCs. Its rails and rungs visually echo hardwired relay circuits.
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