Which of the following statements is correct based on the firewall configuration illustrated in the exhibit?
A. A user can access the Internet using only the protocols that are supported by user authentication.
B. A user can access the Internet using any protocol except HTTP, HTTPS, Telnet, and FTP. These require authentication before the user will be allowed access.
C. A user must authenticate using the HTTP, HTTPS, SSH, FTP, or Telnet protocol before they can access any services.
D. A user cannot access the Internet using any protocols unless the user has passed firewall authentication.
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