An administrator receives multiple reports that users cannot access a secure website hosted on a server the administrator manages.
The administrator investigates and discovers that the reason users cannot access the secure site is because:
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A. B. C. D.C.
The reason why users cannot access the secure website hosted on the server can be determined by analyzing the ports that are used for secure website communication.
Option A: Port 22 is typically used for Secure Shell (SSH) protocol communication. This port is not used for secure website communication, and therefore, closing this port should not affect users' ability to access a secure website hosted on the server.
Option B: Port 80 is the default port used for HTTP protocol communication. HTTP protocol is not secure, and websites using this protocol are not considered secure. Therefore, closing this port should not affect users' ability to access a secure website hosted on the server.
Option C: Port 443 is the default port used for HTTPS protocol communication. HTTPS is a secure protocol used for secure website communication. Therefore, if port 443 is closed, users will not be able to access the secure website hosted on the server.
Option D: Port 3389 is used for Remote Desktop Protocol (RDP) communication. This port is not used for secure website communication, and therefore, closing this port should not affect users' ability to access a secure website hosted on the server.
Therefore, based on the above analysis, the correct answer is C. Port 443 is closed, which is preventing users from accessing the secure website hosted on the server.