The WWW is such an immensely popular Internet facility that for many users, it has become synonymous with the Internet. The World Wide Web was established with the objective of accessing the data from anywhere at any time in form of interlinked hypertext language. The internet is a huge network of computers all connected together. The World Wide Web (‘www’ or ‘web’ for short) is a collection of WebPages found on this network of computers. Your web browser uses the internet to access the web.
Overview of WWW
World-Wide Web (also called WWW or W3) is a hypertext-based information system. Any word in a hypertext document can be specified as a pointer to a different hypertext document where more information pertaining to that word can be found. The reader can open the second document by selecting the word (using different methods depending on the interface; in a mouse based system, a user would probably place the mouse over the word and click the mouse button); only the part of the linked document which contains relevant information will be displayed.
The World Wide Web, or just “the Web,” as ordinary people call it, is a subset of the Internet. The Web consists of pages that can be accessed using a Web browser. The Internet is the actual network of networks where all the information resides. Things like Telnet, FTP, Internet gaming, Internet Relay Chat (IRC), and e-mail are all part of the Internet, but are not part of the World Wide Web. The Hyper-Text Transfer Protocol (HTTP) is the method used to transfer Web pages to your computer. With hypertext, a word or phrase can contain a link to another Web site. All Web pages are written in the hyper-text markup language (HTML), which works in conjunction with HTTP.
The basic unit of WWW communication is the page, similar to this printed page. Within a Web page are “links” on which users can click and be automatically connected to related pages at the same or other Internet Website With its ease of use and its multimedia ability to transmit text, graphics, audio, and video and to retrieve detailed information from anywhere in the world in seconds, the WWW has quickly become the interface of choice for Internet users.
The World-Wide Web also provides access to many of the other tools described in this guide, and is becoming widely used as the major means of access to Internet resources. Special index documents have been created in the WWW information space and these can be searched for given keyword(s). The result is a new document which contains links to documents selected from the index.
The World Wide Web (W3) is the universe of network-accessible information, an embodiment of human knowledge. It is an initiative started at “CERN”, now with many participants. It has a body of software, and a set of protocols and conventions. W3 uses “hypertext” and multimedia techniques to make the web easy for anyone to roam browse, and contribute to.
How to get to WORLD WIDE WEB
Users access the World-Wide Web facilities via a client called a browser, which provides transparent access to the WWW servers. If a local WWW client is not available on your computer, you may use a client at a remote site: this can be an easy way to start using WWW.
Use of a local client is encouraged since it will provide better performance and better response time than a remote client.
Public domain clients for accessing WWW servers are available for: Macintosh, MS-DOS, VMS, VM/CMS, MVS, NeXT, UNIX, and X-Windows. All these platforms support a simple line mode browser. In addition, graphical clients are available for: Macintosh, Windows, X-Windows, NeXT and UNIX. See the list of freely available client software in Appendix A.
To access a remote WWW client, telnet to the client site, if you are new to WWW, you should telnet to info.cern.ch. No login is needed for this, and you will immediately enter the WWW line mode browser.
Some publicly accessible clients have been locally developed. Most remote clients are at sites with WWW servers holding information on specific areas. Telnet to the client site, and at the login: prompt enter www; no password is needed.
- User enters the URL (say, http://www.tutorialspoint.com) of the web page in the address bar of web browser.
- Then browser requests the Domain Name Server for the IP address corresponding to www.abc.com
- After receiving IP address, browser sends the request for web page to the web server using HTTP protocol which specifies the way the browser and web server communicates.
- Then web server receives request using HTTP protocol and checks its search for the requested web page. If found it returns it back to the web browser and close the HTTP connection.
- Now the web browser receives the web page, It interprets it and display the contents of web page in web browser’s window.
 Van Sluyters and Richard C, “Introduction to the Internet and World Wide Web”, ILAR journal 38, Number 4 (1997), pp. 162-167
 “WWW”, available online at: https://techterms.com/definition/www
 “World-Wide Web”, available online at: https://www.ou.edu/research/electron/internet/www.htm
 “WWW Overview”, available online at: https://www.tutorialspoint.com/internet_technologies/www_overview.htm