A technician is troubleshooting a computer that cannot connect to the internet. After identifying the problem and verifying that all physical cables are securely connected, which of the following is the BEST next step to test a theory of a network configuration error?
Open different web browsers to test if the issue persists across all of them.
Restart the computer to see if that resolves the issue.
Replace the network cables and see if there's a difference.
Check the network configuration settings, such as IP address and DNS.
Testing a theory of probable cause involves isolating and verifying potential issues. After confirming physical connections, checking the network configuration settings (like the IP address and DNS) is a direct way to test the theory that a software or configuration error is causing the problem. Restarting the computer is a general step, not a targeted test of a specific theory. Replacing cables addresses the physical layer, which has already been checked. Testing different browsers only isolates the problem at the application layer, whereas checking the IP configuration addresses a more fundamental potential cause.
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