World Wide Web

World Wide Web in short also known as “www” , “w3” , “the web” is a term we frequently heard about in our day to day life being an internet user. Although this has become an essential part of our day to day lives, many still assume it is same as the Internet, the Web is one of many applications built on top of the Internet. But, Internet and World Wide Web are closely linked and they have two different concepts. Internet refers to a global network of computers interconnected in a specific way. The World Wide Web is a collection of web sites/resources and pages which are connected each other and found over this network linked by hyperlinks and URLs(uniform resource locators) such as (www.thecloudiary.com) which can be accessed in computers or mobiles or so. To access the world wide web, a web browser is needed.

Few Examples of Web Browsers: Google Chrome, FireFox, Safari etc.

“the web” consists of several components like

  • The HTTP/HTTPS(https://thecloudiary.com/) protocol helps data transfer between a server and a client.
  • To access a Web component, a client supplies a unique universal identifier, called a URL (uniform resource location) or URI (uniform resource identifier).
  • Hypertext markup language(HTML) is the most common format for publishing web documents.

History

World Wide Web was invented by a computer scientist Sir Timothy John Berners-Lee in 1989 at CERN in Geneva Switzerland. WWW first introduced by Tim Berners-Lee led in the late 1980s and early 1990s. He helped building prototypes of the original core web technologies and coined the term “WWW” . Websites and web browsing exploded in popularity during the mid-1990s and continue to be a major usage of the internet today .

Function of WWW

Viewing a web page on the World Wide Web normally begins either by typing the URL For example(www.thecloudiary.com) of the page into a web browser(chrome, firefox etc.), or by following a hyperlink to that page or resource. The web browser then initiates a series of background communication messages to fetch and display the requested page. In the 1990s, using a browser to view web pages and to move from one web page to another through hyperlinks came to be known as ‘browsing,’ ‘web surfing’ or ‘navigating the Web’. Early studies of this new behaviour investigated user patterns in using web browsers. One study, for example, found five user patterns: exploratory surfing, window surfing, evolved surfing, bounded navigation and targeted navigation.

Steps How WWW works

World wide web works on client server approach, below are the steps how it works.

  1. User types a URL (example: www.thecloudiary.com) in the web browser(chrome, Firefox, etc)
  2. Then the browser requests the Domain Name Server for the IP address corresponding to www.thecloudiary.com
  3. After receiving IP address from DNS, browser sends the request for web page of the URL to the web server using HTTP/HTTPS protocol which specifies the way how the web browser and web server communicates each other.
  4. Then web server receives request using HTTP/HTTPS protocol and checks for the requested web page, if found it returns back the requested web page to the web browser and closes the HTTP/HTTPS connection.
  5. Now the web browser receives the requested web page, and displays the contents of web page in web browser’s tab.

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