Exam GICSP Topic 1 Question 46 Discussion
Actual exam question for GIAC's GICSP exam
Question #: 46
Topic #: 1
Question #: 46
Topic #: 1
What should be considered when implementing fieldbus protocols over an Ethernet network?
Suggested Answer: D Vote an answer
Fieldbus protocols are industrial communication standards used at lower levels of ICS networks. When these protocols are implemented over Ethernet, several considerations arise:
Different fieldbus protocols (such as Modbus TCP, PROFINET, EtherNet/IP) have unique data formats and communication methods.
To enable communication between devices using different protocols, a bridging device or gateway (D) is typically required to translate between protocol types.
Other options are incorrect because:
(A) Ethernet allows multiple hosts to communicate simultaneously.
(B) Different protocols can coexist on the same physical infrastructure using VLANs or other segmentation.
(C) Networks can and should be segmented into VLANs for security and performance.
GICSP covers these considerations in the ICS Security Architecture domain emphasizing protocol interoperability and network design.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.3 (Fieldbus and Ethernet Protocols)
GICSP Training on Network Protocols and ICS Interoperability
Different fieldbus protocols (such as Modbus TCP, PROFINET, EtherNet/IP) have unique data formats and communication methods.
To enable communication between devices using different protocols, a bridging device or gateway (D) is typically required to translate between protocol types.
Other options are incorrect because:
(A) Ethernet allows multiple hosts to communicate simultaneously.
(B) Different protocols can coexist on the same physical infrastructure using VLANs or other segmentation.
(C) Networks can and should be segmented into VLANs for security and performance.
GICSP covers these considerations in the ICS Security Architecture domain emphasizing protocol interoperability and network design.
Reference:
GICSP Official Study Guide, Domain: ICS Security Architecture & Design
NIST SP 800-82 Rev 2, Section 5.3 (Fieldbus and Ethernet Protocols)
GICSP Training on Network Protocols and ICS Interoperability
by Janet at Dec 04, 2025, 12:25 PM
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