Exam GICSP Topic 1 Question 9 Discussion

Actual exam question for GIAC's GICSP exam
Question #: 9
Topic #: 1
During a plant upgrade an architect needs to connect legacy lEDs to a new TCP/IP instrumentation LAN. The lEDs only have RS-232 communication interfaces available. What would best be used to connect the lEDs?

Suggested Answer: C Vote an answer

Legacy devices using RS-232 interfaces require a communications gateway (C) to translate between the serial communication protocol and the new TCP/IP network.
A data diode (A) is a unidirectional security device, not a protocol translator.
An engineering workstation (B) is a computer, not a protocol conversion device.
An industrial switch (D) operates at the Ethernet layer and does not perform protocol conversion.
GICSP emphasizes gateways as essential for integrating legacy ICS devices into modern IP networks while maintaining protocol integrity.
Reference:
GICSP Official Study Guide, Domain: ICS Fundamentals & Architecture
NIST SP 800-82 Rev 2, Section 3.4 (Legacy Protocol Integration)
GICSP Training on ICS Network Architecture and Protocols

by Charlotte at Apr 22, 2026, 08:58 AM

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