EC-Council
312-50V9 · Question #414
312-50V9 Question #414: Real Exam Question with Answer & Explanation
The correct answer is A: The gateway is not routing to a public IP address.. When a computer shares the same subnet as its default gateway and can reach local hosts but not the Internet, the gateway itself is failing to route traffic upstream to a public IP.
Question
A technician is resolving an issue where a computer is unable to connect to the Internet using a wireless access point. The computer is able to transfer files locally to other machines, but cannot successfully reach the Internet. When the technician examines the IP address and default gateway they are both on the 192.168.1.0/24. Which of the following has occurred?
Options
- AThe gateway is not routing to a public IP address.
- BThe computer is using an invalid IP address.
- CThe gateway and the computer are not on the same network.
- DThe computer is not using a private IP address.
Explanation
When a computer shares the same subnet as its default gateway and can reach local hosts but not the Internet, the gateway itself is failing to route traffic upstream to a public IP.
Common mistakes.
- B. 192.168.1.x is a valid private IP address within the RFC 1918 range, so the IP address itself is not the problem.
- C. Both the computer and the gateway share the 192.168.1.0/24 subnet, confirming they are on the same network - this is further evidenced by successful local file transfers.
- D. 192.168.1.x is explicitly a private IP address range defined by RFC 1918, so this statement is factually incorrect.
Concept tested. Default gateway routing and Internet connectivity troubleshooting
Reference. https://learn.microsoft.com/en-us/troubleshoot/windows-client/networking/default-gateway-ip-address
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