You can learn more about FTP from the BIO 256 assignment . Gopher was the forerunner to the World Wide Web. It is organized hierarchically rather than with hyperlinks, and is virtually obsolete. Telnet is a protocol for connecting to a remote computer as a terminal. If you've used the terminals in the basement of the library, that's what telnet is like.
Many library catalogs are accessible only by telnet.
Telnet requires a separate program, but a telnet program is standard in Windows 95. On the Internet, servers can have two different kinds of addresses. DNS addresses are translated into IP addresses by a computer called a domain nameserver. Every DNS address consists of parts separated by periods. The most important thing to a web user about a DNS name is that you can't reliably change it and still connect to the webserver.