I bought an Internet connection and read from a computer magazine that I’m able to connect to an FTP server for downloading files. (I don’t think I needed it for anything, I was just curious of the new technology.) I remember that when I connected to the server, it displayed instructions that one should use “cd x/y/z” to change to a subdirectory, instead of separate commands “cd x”, “cd y”, “cd z”, to save network bandwidth.