The fact "File transfer (FTP) services make it possible for one to move files from a directory on one computer to a directory on another, irrespective of any differences between the computers." is illustrated with the story:1. I had a file on my computer at work.2. I needed to use the file on my computer at home.3. I had to transfer the file from one computer to the other.4. I used the FTP program to move the file from one computer to the other.