SFTP
In plain terms
A secure protocol for transferring files over SSH.
Going deeper
SFTP transfers files within an encrypted SSH connection, protecting data and credentials in transit, unlike plain FTP. It's the secure standard for file transfer.
Under the hood
Runs over SSH (port 22), distinct from FTPS; encrypts everything end to end.
Examples
Secure file transfers, server deployments, automated backups, SSH-based transfer.
Think of it like...
Like sending documents in a locked, encrypted courier pouch instead of open mail.