Which protocol operates over UDP, uses well-known port 69, provides no built-in user authentication, and is commonly used for tasks such as transferring configuration files or boot images on a local network?
FTPS
FTP
TFTP
SFTP
Trivial File Transfer Protocol (TFTP) is deliberately lightweight: it runs on UDP port 69 and has no mechanism for username or password authentication. This minimal design makes it easy to implement and ideal for simple tasks like loading firmware or configuration files during device boot. In contrast, FTP, SFTP, and FTPS all rely on TCP and support authenticated sessions (and, in the case of SFTP and FTPS, encryption), so they do not match all of the characteristics listed in the question.
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