Crucial Exams

Certified Ethical Hacker (CEH) Practice Question

During a security assessment of a gas-pipeline compressor station you discover that Level 2 HMI workstations are cabled directly to the enterprise LAN, with no intervening security device. According to the Purdue Enterprise Reference Architecture and widely accepted guidance such as NIST SP 800-82 and ISA/IEC 62443, which control should be implemented first to bring the design back in line with best practice?

  • Replace all Modbus/TCP traffic on Level 0 with Ethernet/IP to eliminate clear-text protocols.

  • Introduce an industrial DMZ (Level 3.5) protected by stateful firewalls between the enterprise LAN and the OT network.

  • Move the HMI servers to Level 4 so they can share resources with business applications.

  • Enable secure SNMPv3 monitoring on every Level 1 PLC to improve device visibility.

Certified Ethical Hacker (CEH)
Mobile Platform, IoT, and OT Hacking
Your Score:
Settings & Objectives
Random Mixed
Questions are selected randomly from all chosen topics, with a preference for those you haven’t seen before. You may see several questions from the same objective or domain in a row.
Rotate by Objective
Questions cycle through each objective or domain in turn, helping you avoid long streaks of questions from the same area. You may see some repeat questions, but the distribution will be more balanced across topics.

Check or uncheck an objective to set which questions you will receive.

Wipe Score
Bash, the Crucial Exams Chat Bot
AI Bot