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Exam ISA-IEC-62443 Topic 1 Question 107 Discussion

Actual exam question for ISA's ISA-IEC-62443 exam
Question #: 107
Topic #: 1
What does the expression SL-T (BPCS Zone) vector {2 2 0 1 3 1 3} represent?

Suggested Answer: D Vote an answer

The SL-T (BPCS Zone) vector {2 2 0 1 3 1 3} represents the Target Security Level (SL-T) across each of the seven Foundational Requirements (FRs) in ISA/IEC 62443-3-3.
Each number in the vector corresponds to a security level (0-4) assigned to a particular FR, as follows:
FR1 - Identification & Authentication Control (IAC): 2
FR2 - Use Control (UC): 2
FR3 - System Integrity (SI): 0
FR4 - Data Confidentiality (DC): 1
FR5 - Restricted Data Flow (RDF): 3
FR6 - Timely Response to Events (TRE): 1
FR7 - Resource Availability (RA): 3
"Security levels are represented as vectors of seven values, each corresponding to the target security level for a foundational requirement (FR)."
- ISA/IEC 62443-3-3:2013, Annex A - SL Vector Format
This allows zone-specific tailoring based on risk - some FRs may require SL 3, others SL 0, depending on system criticality and exposure.
References:
ISA/IEC 62443-3-3:2013 - Annex A
ISA/IEC 62443-3-2 - SL-T Vector usage in risk assessment

by Dunn at Jun 08, 2026, 04:52 AM

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