CyberCertPrepOT Security FundamentalsOT Fundamentals: ICS/SCADA BasicsEASYFree question
In SCADA terminology, polling describes which communication pattern between the master and remote units?
- A.The master sequentially requests data from each remote unit in turn
- B.Remote units broadcast continuously without being asked
- C.The master never initiates any communication
- D.Remote units control the master's logic
Why A is correct
In polling, the master station queries each RTU in turn and the RTU responds with its data, giving the master deterministic control over the conversation. This contrasts with report-by-exception or unsolicited reporting schemes.
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