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Eccouncil Exam ICS-SCADA Topic 5 Question 9 Discussion
Actual exam question for
Eccouncil's
ICS/SCADA Cyber Security exam
Question #: 9
Topic #: 5
[All ICS/SCADA Cyber Security Questions]
Topic #: 5
How many firewalls are there in the most common ICS/SCADA architecture?
Suggested Answer:
D
The most common ICS/SCADA architecture typically includes two firewalls. This dual firewall configuration often involves one firewall placed between the enterprise network and the ICS/SCADA network, and another between the ICS/SCADA network and the plant floor devices. This arrangement, known as a 'demilitarized zone' (DMZ) between the two firewalls, adds an additional layer of security to help isolate and protect sensitive operational technology (OT) environments from threats originating from IT networks. Reference:
National Institute of Standards and Technology (NIST), 'Guide to Industrial Control Systems (ICS) Security'.
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