Which tool is commonly used for remote administration of computers?

Remote Desktop Protocol (RDP) is specifically designed for the remote administration of computers, allowing users to connect to another computer over a network connection. When using RDP, the user can see the desktop of the remote computer and interact with it as if they were sitting in front of it. This is particularly useful for carrying out system administration tasks, troubleshooting issues, or providing technical support from a distance.

The other tools listed serve different purposes. File Transfer Protocol (FTP) is mainly used for transferring files between computers, while Simple Mail Transfer Protocol (SMTP) is focused on sending and receiving email. Hypertext Transfer Protocol (HTTP) is the foundation of data communication on the World Wide Web, primarily used for accessing web pages. None of these alternatives provide the same functionality for remote administration that RDP does, which is why RDP is the appropriate choice in this context.