Which protocol does Screen Sharing use?

Screen Sharing uses the Virtual Network Computing (VNC) Protocol. VNC is a graphical desktop sharing system that utilizes remote framebuffer (RFB) protocol to allow users to connect to another computer and control it as if they were sitting in front of that machine. This capability is integral for support professionals who need to assist users remotely, enabling them to see the desktop and take control as needed. By employing VNC, Screen Sharing can effectively transmit screen images and receive keyboard and mouse events, facilitating a seamless remote support experience.

In contrast, the other protocols listed serve different purposes. Hypertext Transfer Protocol (HTTP) is primarily used for transferring web pages on the internet. Internet Message Protocol (IMAP) is used for retrieving and managing email messages from a mail server. Simple Network Management Protocol (SNMP) is used for network management and monitoring devices on IP networks. Each of these has its specific use case and is not applicable to the remote desktop sharing functionality provided by Screen Sharing.