Comparison of file transfer protocols: Difference between revisions

Revision as of 13:08, 4 August 2022

Revision as of 20:59, 4 August 2022

Line 261:

{{efn|name=i|1761 is the default port, but 1761–1768 are allocated by [[IANA]].}}

{{efn|name=c|The server listens on TCP port 21 (the control port), and the client sends commands to this port from a random port above 1023. To transfer data in active mode, the server initiates a connection from port 20 to the client at the randomly selected port number.{{pb}}In passive mode, the client uses a random port above 1023 as a control port, and from this initiates file transfer. The server sends or receives data from a randomly selected port above 1023, and the client sends or receives data from one port number above its own randomly selected control port.}}

{{efn|name=d|FTP was originally designed for [[Network Control ProgramProtocol (ARPANET)|NCP]], a protocol used on [[ARPANET]] before the advent of TCP. The TCP implementation of FTP was standardized in {{IETF RFC|959}}.}}

{{efn|name=f|Can be chosen by user, but layers on top of HTTP(S) so often 80/443}}

}}