A factory uses Modbus TCP to connect PLCs to an HMI. The network team wants to add a new HMI in a different building and is considering using a standard Ethernet switch. What is the most important consideration to ensure reliable communication?

Connect the new HMI directly to a PLC's second Ethernet port.

Replace Modbus TCP with a serial Modbus RTU connection.

Use a wireless bridge instead of a switch to avoid cabling.

Ensure the switch supports the required VLAN and QoS settings to prioritize Modbus traffic.

Which of the following is a typical function performed by an HMI in an industrial environment?

Converting physical measurements into electrical signals

Executing the control logic for a process

Displaying alarms and process trends to the operator

Providing power to field devices

A water treatment plant uses a distributed control system (DCS) to manage multiple chemical dosing skids. Each skid has its own local controller that directly reads pH sensors and adjusts pump speeds. The plant engineer wants to add a new skid with a standalone PLC that must communicate with the DCS for supervisory monitoring but must continue to operate independently if the DCS network fails. Which architecture best meets this requirement?

Use a protocol converter to make the PLC appear as a DCS controller to the HMI.

Replace the PLC with a remote I/O rack connected directly to the DCS controller.

Connect the PLC to the DCS via an OPC gateway and configure the PLC to run its control logic locally.

Install the PLC as a slave on the DCS's proprietary bus and let the DCS handle all control logic.

A pharmaceutical company is implementing a Purdue model architecture. They need to allow enterprise users to view production data from the OT network without giving them direct access to the control system. They also need to allow OT engineers to access the enterprise network for maintenance. Which architecture best meets these requirements?

Place the historian in the OT network and give enterprise users direct access to it.

Place a firewall between OT and IT with a rule allowing all traffic from IT to OT.

Place a historian in the DMZ that collects data from the OT network and is accessible to enterprise users.

Use a VPN to allow enterprise users to directly access the HMI servers.

GIAC Global Industrial Cyber Security Professional

Domain 1Objective 1

ICS Components & Architecture GICSP Practice Questions (Page 6)

Part of the ICS Fundamentals and Architecture domain, which makes up ~40% of our current practice bank. GIAC (SANS) does not publish an official question count, but from its 180-minute exam (~70–120 total, ~28–48 in this domain), expect 7–12 from this objective — we provide 53 practice questions to prepare you well beyond it. (estimate)

53questions here

11free pages

10concepts

Questions 26–30

26application · medium
A factory uses Modbus TCP to connect PLCs to an HMI. The network team wants to add a new HMI in a different building and is considering using a standard Ethernet switch. What is the most important consideration to ensure reliable communication?
Select an answer first
27foundation · easy
Which of the following is a typical function performed by an HMI in an industrial environment?
Select an answer first
28application · medium
A water treatment plant uses a distributed control system (DCS) to manage multiple chemical dosing skids. Each skid has its own local controller that directly reads pH sensors and adjusts pump speeds. The plant engineer wants to add a new skid with a standalone PLC that must communicate with the DCS for supervisory monitoring but must continue to operate independently if the DCS network fails. Which architecture best meets this requirement?
Select an answer first
29expert · hard
A pharmaceutical company is implementing a Purdue model architecture. They need to allow enterprise users to view production data from the OT network without giving them direct access to the control system. They also need to allow OT engineers to access the enterprise network for maintenance. Which architecture best meets these requirements?
Select an answer first
30application · easy
A factory is adding a new sensor to an existing PLC. The sensor uses a 4-20 mA analog signal. Which communication method is used to connect the sensor to the PLC?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to GICSP

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by GIAC (SANS). “GICSP” is a trademark of its owner, used for identification only.

ICS Components & Architecture GICSP Practice Questions (Page 6)

Questions 26–30

A factory uses Modbus TCP to connect PLCs to an HMI. The network team wants to add a new HMI in a different building and is considering using a standard Ethernet switch. What is the most important consideration to ensure reliable communication?

Which of the following is a typical function performed by an HMI in an industrial environment?

A factory is adding a new sensor to an existing PLC. The sensor uses a 4-20 mA analog signal. Which communication method is used to connect the sensor to the PLC?

Keep studying — ICS Fundamentals and Architecture