Introducing TCP/IP Networks ICSSCADA Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is the primary purpose of Network Address Translation (NAT)?

   • ATo allow multiple devices to share a single public IP address
   • BTo encrypt data transmitted over the internet
   • CTo filter malicious traffic based on port numbers
   • DTo resolve domain names to IP addresses
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2. 2foundation · easy

   Which protocol is used to dynamically assign IP addresses and other network configuration parameters to devices?

   • ADNS
   • BICMP
   • CARP
   • DDHCP
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4. 3expert · hard

   A SCADA network uses NAT to allow outbound communication from field devices to a central server. The server needs to initiate connections back to the field devices for configuration. The field devices use dynamic private IP addresses. Which solution enables the server to initiate connections to the field devices?

   • AConfigure static NAT mappings for each field device.
   • BUse PAT with a single public IP and port forwarding rules.
   • CUse dynamic NAT with a pool of public addresses.
   • DPlace the field devices on the public internet without NAT.
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5. 4application · medium

   A SCADA network uses IPv4 private addressing. A new substation is added and needs to communicate with the control center over a VPN. The substation's network uses 192.168.1.0/24, and the control center also uses 192.168.1.0/24. Which issue will arise?

   • AIP address overlap will prevent proper routing between the two networks.
   • BThe VPN will automatically translate the addresses to avoid conflicts.
   • CThe DHCP server will assign duplicate IP addresses.
   • DThe DNS server will resolve hostnames to the wrong IP addresses.
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6. 5application · medium

   A water treatment facility uses a SCADA network with a mix of IPv4 devices. A new PLC is added with IP address 192.168.10.45/24. The engineering workstation must communicate with the PLC using a TCP-based protocol. The workstation is on the same subnet. Which statement about the communication is correct?

   • AThe workstation must send an ARP request to the default gateway before it can send any packet to the PLC.
   • BThe PLC's IP address is a Class C private address, so it cannot be used on a SCADA network without NAT.
   • CThe workstation can reach the PLC directly using its IP address; TCP will provide reliable, ordered delivery of the engineering data.
   • DThe workstation must use UDP because TCP cannot traverse a subnet without a router.
   Reveal Solution Discussion Select an answer first