Identify the Differences Between Private and Public IP Addressing NETWORKING-FOUNDATIONS Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A user at a small business reports that they can access internal resources (file server at 10.0.0.5) but cannot browse external websites. The office router has a single public IP (203.0.113.10) provided by the ISP. The internal network uses 10.0.0.0/24. What is the most likely cause of the problem?

   • AThe file server at 10.0.0.5 is using a public IP address, which is causing a conflict.
   • BThe public IP 203.0.113.10 is a private address and cannot be used for internet access.
   • CThe workstation's IP address is not in the RFC 1918 range.
   • DNAT is not configured on the router to translate the private source addresses to the public IP.
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2. 2foundation · easy

   Given the IP address 172.31.255.254, what type of address is it?

   • APublic
   • BLink-local
   • CLoopback
   • DPrivate
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4. 3application · medium

   A network engineer is setting up a new lab environment for testing. The lab is isolated from the production network and the internet. The engineer needs to assign IP addresses to 50 test devices. Which of the following is the most appropriate addressing scheme?

   • AUse the 172.32.0.0/16 range to avoid conflicts with the production network.
   • BUse the 10.0.0.0/8 range, but only if the lab is connected to the internet via NAT.
   • CUse public IP addresses from the 203.0.113.0/24 range to ensure compatibility with future internet testing.
   • DUse private IP addresses from the 192.168.50.0/24 range.
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5. 4foundation · easy

   Which of the following IP addresses is a public IP address?

   • A172.20.10.5
   • B8.8.8.8
   • C10.0.0.1
   • D192.168.0.1
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6. 5application · medium

   A network architect is designing a multi-site WAN for a company with offices in New York, London, and Tokyo. Each office will use the 10.0.0.0/16 subnet for its internal devices. The offices are connected via a private MPLS WAN. Which statement about this design is correct?

   • AThis design will fail because private IP addresses must be globally unique across all connected networks.
   • BThis design is valid only if each office uses NAT to translate its internal addresses to unique public IPs before sending traffic over the MPLS.
   • CThis design is valid because private IP addresses can be reused across networks without conflict, even when interconnected.
   • DThis design will cause routing conflicts because all three offices use the same 10.0.0.0/16 subnet on the interconnected MPLS network.
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