The MOST Likely Misconfiguration for Internet Access: DNS

A user claims to have no Internet access but can access local resources.

A technician determines the issue is with a configuration because a ping to a working public website shows a response that starts with: Ping request could not find host Which of the following is the MOST likely misconfiguration?

A.

Incorrect netmask

B.

DNS

C.

DHCP

D.

SSL certificate.

B.

The correct answer is B. DNS.

Domain Name System (DNS) is responsible for translating domain names into IP addresses that computers can understand. When a user attempts to access a website by typing in its domain name, their computer sends a request to a DNS server to resolve the domain name into an IP address.

In this scenario, the user is able to access local resources but cannot access the Internet. When the technician pings a public website, the response is "Ping request could not find host," indicating that the DNS server was unable to resolve the domain name into an IP address. This suggests that there is an issue with the DNS configuration.

Possible reasons for a DNS misconfiguration include:

1. Incorrect DNS server settings: If the user's computer is configured to use the wrong DNS server, it may not be able to resolve domain names correctly. The technician should verify that the DNS server settings are correct.

2. DNS server failure: If the DNS server itself is experiencing issues, it may not be able to resolve domain names. The technician should check the DNS server for any errors or issues.

3. Incorrect DNS zone configuration: If the DNS server is configured incorrectly, it may not be able to resolve domain names correctly. The technician should verify that the DNS zone configuration is correct.

Once the DNS misconfiguration has been identified and corrected, the user should be able to access the Internet without any issues.