Basics of FTP

FTP, which is an acronym for File Transfer Protocol, is a client-server protocol that allows users to transfer files to and from other computers over a TCP/IP network. FTP has its origins at M.I.T. around 1971, and while it has evolved somewhat over the years, it's one of the oldest protocols that is still in use and dates back to the days of Unix mainframe computers and dumb terminals. For example, a student at a university would log on to their shell on a campus server with their terminal in the computer lab and invoke an FTP client program to connect to another computer and download course curriculum or research documents, to their home directory. If you were dialing in to the remote shell from home, you could use your terminal program and invoke ZMODEM to transfer the file from your home directory to your local computer.

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