IEC 62443 ICSSCADA Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A company is implementing a cybersecurity program for its ICS and is considering using both IEC 62443 and NIST SP 800-82. The security manager wants to avoid duplication of effort. Which approach is most effective?

   • AUse ISO 27001 instead of both, as it is the most comprehensive standard.
   • BUse NIST SP 800-82 as the primary framework and ignore IEC 62443 because they are similar.
   • CImplement both frameworks independently to ensure full coverage.
   • DUse IEC 62443 as the primary framework and map NIST SP 800-82 controls to it for additional guidance.
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2. 7application · medium

   A system integrator is installing a new PLC for a food processing plant. The integrator notices that the PLC firmware has known vulnerabilities but the plant's asset owner has not specified a security level. The integrator is under pressure to finish the installation. What should the integrator do to align with IEC 62443?

   • AInstall the PLC and immediately patch the firmware with a beta version that addresses the vulnerabilities.
   • BProceed with the installation and document the vulnerabilities for the asset owner to address later.
   • CInstall the PLC and apply compensating controls, such as network segmentation, to reduce the risk.
   • DStop the installation and require the asset owner to define the target security level before proceeding.
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4. 8application · medium

   A security consultant is advising a client that operates a natural gas pipeline. The client is already certified against ISO 27001 and wants to know if that is enough for OT security. The consultant should explain that ISO 27001 is not sufficient because:

   • AISO 27001 is a voluntary standard, while IEC 62443 is legally mandatory for pipelines.
   • BISO 27001 is only applicable to IT systems, not to any OT environment.
   • CISO 27001 focuses on confidentiality, while IEC 62443 focuses exclusively on availability.
   • DISO 27001 does not address the unique safety and availability requirements of industrial control systems.
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5. 9foundation · easy

   Which of the following best describes the scope of the IEC 62443 series?

   • AIt focuses exclusively on network perimeter security
   • BIt applies only to IT networks in industrial environments
   • CIt is limited to safety instrumented systems (SIS)
   • DIt covers cybersecurity for all types of industrial automation and control systems, including hardware, software, and processes
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6. 10application · medium

   A multinational company is developing a cybersecurity program that must satisfy both corporate IT compliance (ISO 27001) and OT security requirements. The OT team argues that IEC 62443 is the appropriate framework for the ICS environment. Which statement best explains why IEC 62443 is uniquely suited for OT compared to ISO 27001?

   • AIEC 62443 focuses exclusively on network security, while ISO 27001 covers only physical security.
   • BIEC 62443 provides specific guidance on safety, reliability, and real-time operational constraints that are not the focus of ISO 27001.
   • CIEC 62443 is a legal regulation that supersedes ISO 27001 in all countries.
   • DIEC 62443 is only applicable to the energy sector, whereas ISO 27001 applies to all industries.
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