IEC 62443 ICSSCADA Practice Questions (Page 8)

Questions 36–40

1. 36expert · hard

   A manufacturing company is designing a new production line. The line will be connected to the corporate network for data analytics. The security team has identified the following requirements: the production line must achieve SL 3, but the corporate network is only SL 2. The company is considering two options: (1) place the production line in a separate zone with a firewall to the corporate network, or (2) upgrade the corporate network to SL 3. Which option is more aligned with IEC 62443?

   • ANeither option is sufficient; the production line should be completely isolated from the corporate network.
   • BOption 2, because the corporate network must match the security level of the production line.
   • COption 1, because it creates a clear trust boundary and avoids the cost of upgrading the entire corporate network.
   • DBoth options are equally valid, and the choice should be based on cost only.
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2. 37foundation · easy

   What is the primary purpose of the IEC 62443 series of standards?

   • ATo provide a framework for cybersecurity of industrial automation and control systems (IACS)
   • BTo define safety requirements for machinery used in industrial environments
   • CTo specify electrical safety requirements for control panels
   • DTo establish communication protocols for industrial field devices
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4. 38application · medium

   A product supplier is developing a new PLC that will be used in an IACS. The supplier wants to claim compliance with IEC 62443. What is the most important requirement for the supplier to meet?

   • AObtain certification from a third-party for the PLC.
   • BEnsure the PLC has the highest possible security level, SL 4.
   • CFollow a secure development lifecycle as defined in IEC 62443-4-1.
   • DProvide a detailed user manual for the PLC.
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5. 39application · medium

   A control system integrator is developing a security policy for a client's new water distribution system. The client wants to know which IEC 62443 document provides guidance on the overall security management system, including policies, procedures, and personnel training. Which part of IEC 62443 should the integrator reference?

   • AIEC 62443-1-1, which provides terminology and concepts.
   • BIEC 62443-2-1, which covers security management system requirements for IACS.
   • CIEC 62443-3-3, which specifies system security requirements and security levels.
   • DIEC 62443-4-2, which defines technical security requirements for components.
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6. 40expert · hard

   A power generation company is implementing IEC 62443. They have a control network with multiple zones, including a safety zone and a business zone. The safety zone requires SL 4, while the business zone requires SL 2. The network team wants to connect the two zones for reporting purposes. What is the most secure way to establish this connection?

   • AUse a VPN tunnel between the two zones.
   • BUse a data diode to allow one-way communication from the safety zone to the business zone.
   • CUse a direct connection with a firewall that allows only specific protocols.
   • DPlace both zones in the same network segment and rely on access control lists.
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