The Telnet is program that use the telnet protocol.part of the TCP/IP protocol. suite.The remote
computer, called the telnet server, accepts telnet connections from client over a TCP/IP system.
Because the Internet is a TCP/IP network, telnet works happily between computers attached to
it—provided that the telnet program is installed on the server end and you have compatible version of the telnet client on your computer.
'Don't be surprised if you try to use telnet with a remote computer on the Internet and can't get a connection—not all computers have telnet enabled.'
The telnet client and server components negotiate how they will use the connection, so that even if the two systems are not of the same type, they will find a common language.
A Macintosh user running a System 7 version of telnet can go through the Internet and connection on an IBM mainframe that is running the MVS operating system. The Macintosh can then run IBM software on the mainframe. Of course, all that's happening, that the remote computer's screen display is being received, but the end result makes is appear as though it were running on the local computer.
Telnet does have its limits.It the traffic is heavy on nay of the network that connect you to the remote computer performance many make hte updates tpo your own screen very slow.
You must also remember,when you want to print something to make sure that the output device is on your computer and not on the remote machine.
Finally if you want to save date to fine using the remote program and plan to store it on the remote computer you will need to have the required privileges you will also have to FTP the data to yourself if you want a local copy.
Telnet makes it possible to use a remote computer as if it were the computer as if it were the computer in front of you.With the internet that remote computer could be many thousands of miles away.
In educational and research environments, it's not uncommon to have accounts on many Internet computers. This occurs most often at universities, where there are numerous departments and many computers with different operating systems using a variety of programs.
It also occurs if you are affiliated with a number of schools where you work, teach, study, or have ongoing collaborative research. These days, it's not uncommon for people to have some accounts on an educational system and others where they work. Telnet enables you to access any of your accounts from any point on the Internet.
Telnet is most often used for public or commercial purposes, allowing remote users to search large, complex, or proprietary databases. Examples include the ERIC service, indexes of educational journals, databases of the full text of Shakespeare's plays, and databases such as CARL's UnCover2—most of which are free. There are also fee-charging database providers, such as DIALOG and OCLC.
The Educational Resources Information Center (ERIC) is a reference publication for the National Education Information Network, sponsored by the U.S. Department of Education. ERIC i ncludes a database of citations and abstracts for educational literature and is divided into the Current urrent Index to Journals in Education (CUE) and the findings, reports, speeches, books, and other items covered in Resource in Education (RIE).
The CIJE indexes over 700 professional journals, which makes it a popular database for finding information relating to education. This government-produced database is a valuable re Source for materials in education, and its scope has expanded to include other related materials t
hat may be of interest to many multidisciplinary educational areas.
To use telnet, give the telnet program the address of the computer you want to connect to. For example: telnet ucsbuxa.edu.
Until recently, this was the only way to place a telnet connection. Today, however, many people use Gopher (see Chapter 10, "Navigating by Menus: Gopher") to "launch" telnet. With Gopher, you'll find menu items that lead to virtual terminal sessions using telnet. When you select one of these items, telnet is engaged, and the address of the target connection is automatically passed on. Thus, the Gopher menu item might say Use telnet to access Costello at UCSB rather than telnet ucsbuxa.edu.
Gopher is a much more convenient way to use telnet because you don't need to remember the Internet address of the machine you want to contact. The Gopher system, however, does not have menu items for telneting to every machine on the Internet.
There are many private computers on the Internet that you might want to access that aren't on any Gopher menus. Even if you have a Gopher server running on your local machine, you may find it more convenient to telnet to an infrequently used remote machine than to add a Gopher menu item that will be used only occasionally.
In short, even though you can do a great deal using telnet through Gopher, you should learn to use telnet when Gopher can't do the job.