FTP

We have just seen the use of telnet to implement the TCP/IP protocol and allow remote logins to computers over networks. Now we look at another very useful TCP/IP protocol. This one is concerned, not with letting us log into a remote computer, but with allowing us to transfer files between two different computers on the Internet. It is named "File Transfer Protocol", but is usually just called FTP.

We shall illustrate the FTP protocol using a shareware program called Fetch (as in, "Rover, fetch that file for me!" It even has a cute on-screen dog that goes after the file for you). We will see how FTP can be used to fetch files from many different sources on the Internet.

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