Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During a security assessment of an electrical substation, you discover that the SCADA control LAN is bridged to the corporate network through an unmanaged switch and that PLCs exchange unauthenticated Modbus/TCP traffic in clear text. To address the OT security principles of network segmentation and least functionality while introducing minimal latency to real-time control traffic, what should you recommend first?

  • Configure 802.1X port-based authentication on every PLC and HMI in the control network.

  • Enable SNMPv3 on the existing switch to secure its management interface and monitor configuration changes.

  • Deploy an industrial firewall that performs protocol-aware filtering between the corporate network and the SCADA control network.

  • Install host-based intrusion detection agents directly on each PLC to monitor traffic locally.

Certified Ethical Hacker (CEH)
Mobile Platform, IoT, and OT Hacking
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