A pipeline operator wants to use a data diode to send SCADA alarms to a remote monitoring center. The monitoring center also needs to send configuration changes back to the RTUs. What is the main limitation the operator must address?

Data diodes are one-way, so configuration changes cannot be sent back through the same device

Data diodes cannot handle the volume of alarm traffic

Data diodes only support serial protocols, not Ethernet

Data diodes introduce too much latency for alarm delivery

A pipeline operator wants to use a data diode to send real-time pressure data to a monitoring center. The monitoring center also needs to send control commands back to the pipeline's valves. What should the operator do?

Send control commands through the data diode by encoding them in the data stream.

Use a firewall instead of a data diode because it can support both directions.

Use a data diode for the pressure data and implement a separate, secure bidirectional channel for control commands.

Use the data diode in both directions by swapping the transmit and receive sides periodically.

Which hardware component is commonly used in a data diode to achieve one-way data transfer?

A standard Ethernet switch with VLAN segmentation

A fiber optic cable with a transmitter on one end and a receiver on the other, with no return path

A router with access control lists that block inbound packets

A wireless access point with WPA2 encryption

A hospital's building management system (BMS) is connected to a data diode that sends temperature and humidity readings to a central monitoring station. The BMS vendor wants to remotely troubleshoot the system over the same connection. What should the facility do?

Replace the data diode with a firewall that allows the vendor to connect anytime

Disable the data diode and rely on the BMS's built-in security features

Ask the vendor to send commands through the data diode in the reverse direction

Allow the vendor to use a separate VPN connection that is only enabled during maintenance windows

What is a primary security benefit of using a data diode in an ICS/SCADA environment?

It prevents malware from being introduced into the OT network from external sources

It provides a backup communication path in case the primary network fails

It encrypts all data leaving the OT network to prevent eavesdropping

It authenticates users before allowing them to access the OT network

EC-CouncilICS/SCADA Cybersecurity

Domain 7Objective 3

Data Diode ICSSCADA Practice Questions (Page 6)

Part of the Bridging the Air Gap domain, which makes up ~8% of our current practice bank. EC-Council does not publish an official question count, but from its 120-minute exam (~50–80 total, ~4–6 in this domain), expect 1–2 from this objective — we provide 37 practice questions to prepare you well beyond it. (estimate)

37questions here

8free pages

7concepts

Questions 26–30

26application · medium
A pipeline operator wants to use a data diode to send SCADA alarms to a remote monitoring center. The monitoring center also needs to send configuration changes back to the RTUs. What is the main limitation the operator must address?
Select an answer first
27application · medium
A pipeline operator wants to use a data diode to send real-time pressure data to a monitoring center. The monitoring center also needs to send control commands back to the pipeline's valves. What should the operator do?
Select an answer first
28foundation · easy
Which hardware component is commonly used in a data diode to achieve one-way data transfer?
Select an answer first
29application · medium
A hospital's building management system (BMS) is connected to a data diode that sends temperature and humidity readings to a central monitoring station. The BMS vendor wants to remotely troubleshoot the system over the same connection. What should the facility do?
Select an answer first
30foundation · easy
What is a primary security benefit of using a data diode in an ICS/SCADA environment?
Select an answer first

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