You configured the IP address and DNS name of a new internal web server named WEB3. Your first test from a web browser on your workstation was successful. But when you came to work this morning, you were not able access WEB3 from the same client computer using the same browser. You get an error message stating that this site cannot be reached. You have not changed the server's IP configuration since the successful test the night before. Which troubleshooting step should you try first to discover what the problem might be?