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What is the Internet?

It's a giant net or cobweb enclosing the world. Each node is a computer connected to two other computers. Each computer has its own identity, a registered number and a name. Some of the computers are called DNS, Domain Name Server: when one calls a computer by name, the DNS provides the corresponding number. All speak a language called TCP/IP, or Transmission Control Protocol/Internet Protocol, and on our own machines, there is an interface between their language and TCP/IP.

Basically, the Internet has three sections: e-mail, the Usenet, the WWW=World Wide Web. A limited Internet account will at least provide e-mail, a facility for sending messages and files to anyone who has an e-mail account at telephone speed and at the cost of a local phone call. Usenet is the name for all newsgroups, groups of people with a common special interest, who exchange information with each other. These groups may be public or they may be restricted to their members who need a password for access. Any Internet software includes a newsreader that lets one select and access newsgroups. The World Wide Web is a vast collection of files (or "pages") which may be images, sound, text or they may contain a group of links which in turn link to other files. Generally, one needs a good search engine to find the information one is looking for. See Searching and Search help.

Whenever one calls a link,  i.e., moves the mouse cursor to the link and clicks, a copy of a file is transmitted to one's computer's memory where the data are made visible by a browser. There are simple text-based browsers such as Lynx which is used on the Alpha and on the Vax. Lynx does not show colors or graphics but it is fast. There are also graphic browsers which let you "see" formatted text, colors, images, sound--such as Netscape Navigator, Microsoft Explorer, Mosaic. On each browser, the same file looks different. But with the help of the browser, one can see the file. One can also print it or download it for storage on one's own computer.

As more and more people all over the world go online, using the Internet takes more and more determination. You may need to try several times to get a connection and you may find that browsing the WWW or downloading a file takes more and more patience. Pick odd hours to connect, for both ends of your call; in other words, to connect to a server in Europe find a time outside of both your local and European business hours. To speed up transfer, turn off the graphics, link to text-only pages.


Description

Britannica Internet Guide

Tutorials

Netscape's Browser Tutorial: click Help at the top of this screen, Help Contents, Browsing the Web
OR: click Help at the top of this screen, Reference Library, Take a tour (fairly technical)
C y b e r C o u r s e (tm) || GlobalCenter Web Home Page || Netscape Tutorial ||
download a free Interactive Guide: http://www.sierramm.com/smpnet.html

Answers

Ask Dr. Internet index || Free Computer Help (technical, for more than the Internet)

Bookmarks, using Netscape Communicator

If you want to return to a page in a book, you put a bookmark on the page, thus being able to return to it easily at a later point.  You can do the same thing on the Web.  Each browser comes with a bookmark file.  If you find a site interesting, click on Bookmark, click on Add.  The bookmark is added at the end of your file.  When you want to return to the site, click on Bookmark to open the file, scroll to the site, click it.  The standard bookmark file is called bookmark.htm and resides on the hard disk in the Netscape directory.  But it can have any name you choose, and you can have several files.

In our labs and at any computer on campus, you need your bookmark file on a floppy disk.  Get a starter copy from your instructor.  When you start your session on the Web, put your diskette in the drive, open Netscape Communicator, click on Bookmarks, click on Edit bookmarks, on File, on Open, select your file on your diskette.  Minimize the windows.


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Hoffmann, Feb. 1999