Internet RFCs and STDs ICSSCADA Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which RFC defines the Internet Protocol (IP) and is fundamental to TCP/IP networks used in ICS/SCADA environments?

   • ARFC 1035
   • BRFC 793
   • CRFC 791
   • DRFC 768
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   What is the primary purpose of an Internet RFC (Request for Comments) document?

   • ATo list the physical locations of all internet exchange points worldwide.
   • BTo act as a repository for user feedback on internet applications.
   • CTo provide a formal legal contract between internet service providers and their customers.
   • DTo serve as the official specification and documentation for Internet protocols, procedures, and concepts.
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   An engineer is configuring a new historian server that must receive process data from multiple PLCs over the network. The PLCs send data using a proprietary protocol encapsulated in TCP. The engineer needs to ensure the TCP implementation is correct. Which RFC defines the current TCP specification?

   • ARFC 9293
   • BRFC 768
   • CRFC 791
   • DRFC 793
   Reveal Solution Discussion Select an answer first
5. 24expert · hard

   A water utility is implementing a new SCADA system that will use both Modbus/TCP and EtherNet/IP. The engineer needs to ensure that both protocols can coexist on the same network without conflicts. What is the primary consideration?

   • AThe engineer must ensure that the network can handle the traffic patterns of both protocols, and that firewalls allow the specific ports each protocol uses.
   • BBoth protocols use the same TCP/UDP ports, so they will conflict.
   • CThe engineer must choose one protocol because they cannot run simultaneously.
   • DBoth protocols are defined by RFCs, so they are interoperable by default.
   Reveal Solution Discussion Select an answer first
6. 25application · medium

   A junior engineer asks why the SCADA system's Modbus/TCP implementation follows a specific behavior that is not documented in the vendor manual. The senior engineer explains that the behavior is defined by an RFC. What is the primary purpose of RFCs in this context?

   • ATo provide a legal contract between vendors and users.
   • BTo define standards that ensure interoperability between different vendors' implementations.
   • CTo serve as marketing documents for protocol features.
   • DTo replace vendor-specific documentation entirely.
   Reveal Solution Discussion Select an answer first