IEC 62443 ICSSCADA Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   Which phase of the IEC 62443 security lifecycle involves identifying risks and determining the necessary security levels?

   • AImplementation
   • BAssessment
   • CDesign
   • DMaintenance
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2. 2application · medium

   An asset owner is defining the target security level for a new zone that will contain a safety instrumented system (SIS). The risk assessment shows that a cyber attack on the SIS could lead to a catastrophic release of toxic chemicals. According to IEC 62443, what is the most appropriate target security level for this zone?

   • ASL 4, because the consequence of a compromise is catastrophic and the threat model includes sophisticated attackers.
   • BSL 1, because the SIS is a safety system and not a target for cyber attacks.
   • CSL 3, because the SIS requires high security but not the highest level.
   • DSL 2, because the SIS is isolated from the internet.
   Reveal Solution Discussion Select an answer first
4. 3expert · hard

   An asset owner is defining the target security levels for a new system. The system has two zones: Zone A contains a critical process that could cause a fire if compromised, and Zone B contains a less critical process. The asset owner wants to achieve SL 3 for Zone A and SL 2 for Zone B. However, the system integrator suggests that both zones should be SL 3 to simplify the design. What is the best decision?

   • ASet both zones to SL 4 to ensure maximum security.
   • BSet both zones to SL 2 to reduce costs.
   • CSet Zone A to SL 3 and Zone B to SL 2 as originally planned.
   • DFollow the integrator's suggestion and set both zones to SL 3.
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5. 4foundation · easy

   What is a key difference between IEC 62443 and ISO/IEC 27001?

   • AIEC 62443 only covers network security, while ISO/IEC 27001 covers all aspects of security
   • BIEC 62443 is specifically designed for industrial automation and control systems, while ISO/IEC 27001 is a general information security management standard
   • CIEC 62443 is a regulatory standard, while ISO/IEC 27001 is voluntary
   • DIEC 62443 is only applicable to the energy sector, while ISO/IEC 27001 applies to all sectors
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6. 5foundation · easy

   In the IEC 62443 zones and conduits model, what is a zone?

   • AA group of assets that share common security requirements based on risk
   • BA communication path between two or more zones
   • CA security policy document that defines access rules
   • DA single network device that filters traffic
   Reveal Solution Discussion Select an answer first