File Transfer Protocol (FTP) in Application Layer

Aug 29, 2018 UDT: Breaking the Data Transfer Bottleneck UDT is a reliable UDP based application level data transport protocol for distributed data intensive applications over wide area high-speed networks. UDT uses UDP to transfer bulk data with its own reliability control and congestion control mechanisms. The new protocol can transfer data at a much higher speed than TCP does. File Transfer Protocol (FTP) in Application Layer

FTP is a TCP based service exclusively. There is no UDP component to FTP. FTP is an unusual service in that it utilizes two ports, a 'data' port and a 'command' port (also known as the control port). Traditionally these are port 21 for the command port and port 20 for the data port.

List of TCP and UDP port numbers - Wikipedia 248 rows File Transfer Protocol - Wikipedia The standardization of TCP and UDP reduced the need for the use of two simplex ports for each application down to one duplex port,: 15 but the FTP protocol was never altered to only use one port, but continued using two for backwards compatibility.

List of TCP and UDP port numbers - Wikipedia

Does FTP use TCP? - Quora