220-1102 Question #454: Real Exam Question with Answer & Explanation

Question

A technician is unable to access the internet or named network resources. The technician receives a valid IP address from the DHCP server and can ping the default gateway. Which of the following should the technician check next to resolve the issue?

Options

• AVerify the DNS server settings
• BTurn off the Windows firewall
• CConfirm the subnet mask is correct
• DConfigure a static IP address

Explanation

Since the technician can ping the default gateway but not access the internet or named resources, the next logical step is to verify DNS server settings, as DNS is critical for resolving domain names to IP addresses.

Common mistakes.

• B. Turning off the Windows firewall might resolve some connectivity issues, but it's not the first step when the problem specifically points to external resource access after confirming local gateway reachability; a DNS issue is more likely for 'named network resources'.
• C. Confirming the subnet mask is correct is less likely to be the issue since a valid IP was received via DHCP and the default gateway was successfully pinged, indicating proper local subnet communication.
• D. Configuring a static IP address is generally not a troubleshooting step for a DHCP-enabled network unless there are known issues with the DHCP server itself, and it doesn't directly address the symptom of failing to access named resources when the gateway is reachable.

Concept tested. Network troubleshooting - DNS resolution

Reference. https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/troubleshoot-dns-issues

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