ICS/SCADA Protocols ICSSCADA Practice Questions (Page 9)

Questions 41–43

1. 41foundation · easy

   Why do many ICS/SCADA protocols have real-time requirements?

   • ABecause they need to maximize data throughput for large file transfers
   • BBecause they need to support high-definition video streaming for surveillance
   • CBecause they must encrypt all data in real time to prevent cyberattacks
   • DBecause control decisions must be made within strict time limits to maintain process stability and safety
   Reveal Solution Discussion Select an answer first
2. 42expert · hard

   A control system engineer is selecting a protocol for a new high-speed packaging line that requires synchronized motion control between multiple servo drives. The line also needs to integrate with a higher-level MES system for production reporting. Which protocol architecture is best suited for this dual requirement?

   • AUse Modbus TCP for both motion control and MES integration.
   • BUse OPC UA for motion control and Modbus TCP for MES integration.
   • CUse DNP3 for motion control and OPC UA for MES integration.
   • DUse EtherCAT for real-time motion control and OPC UA for MES integration.
   Reveal Solution Discussion Select an answer first
3. 43expert · hard

   A company is planning to connect its SCADA network to the internet for remote monitoring. The SCADA network uses DNP3 and Modbus TCP. The security team must ensure that the connection is secure while maintaining the ability to monitor and control the system remotely. What is the most appropriate approach?

   • AExpose the SCADA protocols directly to the internet
   • BUse a reverse proxy for the SCADA protocols
   • CDisable all remote access and use on-site monitoring only
   • DUse a VPN tunnel for remote access and implement strict firewall rules
   Reveal Solution Discussion Select an answer first