In a mixed environment, which protocol is used for remote desktop access in Windows?

The correct protocol for remote desktop access in Windows is RDP (Remote Desktop Protocol). RDP is specifically designed by Microsoft to enable users to connect to and control Windows computers remotely over a network. It provides a graphical user interface and allows full interactive access to the desktop, enabling users to run applications and manage files as if they were sitting in front of the machine.

RDP also includes features such as network-level authentication, encryption, and support for multiple sessions, which enhances security and usability in a mixed environment, where Windows and possibly other operating systems interact. It is the standard method for remote administration of Windows servers and desktops, making it indispensable in environments that require remote management.

In contrast, SSH is primarily used for secure command-line access to Unix/Linux systems and does not provide a full GUI interface comparable to RDP. Telnet also provides remote access but lacks encryption, making it less secure and unsuitable for use in modern environments. SCP, on the other hand, is a protocol used for secure file transfers but does not facilitate remote desktop access.