File transfer software facilitates the transfer of files between systems over a network. It's essential for tasks such as updating webpages, backing up data to a remote server, or sharing large files within an organization. FTP (File Transfer Protocol) is the correct answer because it is a standard network protocol used for the transfer of computer files between a client and server on a computer network. SSH (Secure Shell) is primarily used for secure remote login and command execution, not for file transfers. VNC (Virtual Network Computing) is used for remote desktop sharing, not specifically for file transfer. RDP (Remote Desktop Protocol) is also for remote desktop access and control, not centered around file transfers.