Exam GICSP Topic 1 Question 2 Discussion

Actual exam question for GIAC's GICSP exam
Question #: 2
Topic #: 1
Which of the following is a protocol that will provide control center-to-control center SCADA communications in a situation where each of the control centers implement a different vendor-supplied protocol internally?

Suggested Answer: A Vote an answer

ICCP (Inter-Control Center Communications Protocol) (A) is designed for control center-to-control center communication and interoperability, especially when different internal vendor protocols are used.
DNP3 (B) and Modbus/TCP (D) are primarily used for control center to field device communications.
BACnet (C) is for building automation.
MMS (E) is a messaging standard but less commonly used for inter-control center communications.
GICSP highlights ICCP as critical for interoperability across heterogeneous ICS networks.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
IEEE and IEC Protocol Standards
GICSP Training on ICS Communication Protocols

by Doris at Jan 04, 2026, 05:04 PM

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