A new Windows server has been introduced to the network. The server administrator is trying to connect remotely to the server but is unsuccessful. Basic troubleshooting shows the server is visible…

Remote Desktop Connection (RDC) is the standard Windows feature that allows users to connect to a desktop session of a remote computer over a network. Enabling this feature on the server is a prerequisite for remote access.

Remote Procedure Call (RPC) is a protocol for inter-process communication, not a primary remote access method for a desktop session.

Remote Assistance is a feature that allows a user to ask for help from another user, who can then view or control their desktop, which is different from an administrator initiating a full remote desktop session.

Port 443 is typically used for HTTPS (secure web traffic), not for RDP.

Port 3389 is the default TCP port used by the Remote Desktop Protocol (RDP) client to communicate with the RDP server running on the remote Windows machine. This port must be open in the server's firewall to allow incoming RDP connections.

Port 5900 is commonly used by the Virtual Network Computing (VNC) protocol, which is not the native remote access protocol for Windows servers.