TFTP expanded as Trivial File Transfer Protocol, is an internet standard which allows a user to transfer files.
Being a simple-to-use standard when compared to the File Transfer Protocol, it can be used when user authentication and directory visibility are not required in a file transfer. Instead of using the traditional TCP, it makes use of User Datagram Protocol. TFTP is primarily used for initial stages of nodes booting from LAN.
It is to be noted that TFTP doesn’t have a login or any access control mechanisms, so it must be used with utmost care when involving files that needs authentication, access control, confidentiality, or integrity checks.