As mentioned, TFTP uses UDP as a transport, as opposed to TCP which FTP uses, and works on port 69, you can clearly see that in the cool 3D diagram on the left. Port 69 is the default port for TFTP, but if you like, you can modify the settings on your TFTP server so it runs on a different port.

Is TFTP port TCP or UDP?

TFTP uses UDP as its transport protocol. A transfer request is always initiated targeting port 69, but the data transfer ports are chosen independently by the sender and receiver during the transfer initialization.

Does file transfer use TCP?

TCP, short for Transmission Control Protocol, is a communication standard that enables application programs and computing devices to exchange data and/or messages over networks. ... However, many major applications rely on TCP such as file transfers (FTP), email, and remote administration.