A network administrator responds to a support ticket that was submitted by a customer who is having issues connecting to a website inside of the company network. The administrator verifies that the customer could not connect to a website using a URL. Which of the following troubleshooting steps would be BEST for the administrator to take?


A. Check for certificate issues.
B. Contact the ISP.
C. Attempt to connect to the site via IP address.
D. Check the NTP configuration.