The World Wide Web was created in 1991 by Tim Berners-Lee as a way to share scientific documents over the Internet. It uses HTML pages that can be accessed via HTTP and linked together through hyperlinks. While often used interchangeably, the Web is actually a subset of the larger Internet, which includes other applications like email and file transfer. The Web evolved from static publishing in its early Web 1.0 stage to include more participation and social features in Web 2.0, and aims to add semantic capabilities in its ongoing development of Web 3.0.

1. Part-I

2. The World Wide Web (WWW) is a network of online content that is
formatted in HTML and accessed via HTTP. The term refers to all
the interlinked HTML pages that can be accessed over the Internet.
The World Wide Web was originally designed in 1991 by Tim
Berners-Lee while he was a contractor at CERN.
The World Wide Web is most often referred to simply as
“The Web."

3. It is important to know that this is not a synonym for the Internet.
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.

4. In the beginning, World Wide Web was introduced as a medium for
sharing scientific and research documents, especially, between
government organizations and academic institutions. But with the
passage of time, it evolved and crossed the limits defined for it.
Initially, till 1990, the WWW(World Wide Web) remains within the
boundaries of CERN (a research organization), but by 1991, it
became available to anyone using internet.

5. Web 1.0 – The World Wide Web
(1990 – 2000)
 Remain limited mostly to static websites.
 Mostly publishing / Brochure-ware. Limited to reading only for
majority.
 Proprietary and closed access.
 Corporations mostly, no communities.
 HTTP, HTML

6. Web 2.0 – The Social Web
(2000 – 2010)
 Publishing as well as Participation
 Social Media, Blogging, Wikis
 RSS – Syndicate site contents.
 Rich User Experience
 Tagging
 Keyword Search
 AJAX, JavaScript Frameworks (jQuery, Dojo, YUI, Ext Js etc), XML,
JSON

7. Web 3.0 – The Semantic Web
(2010 – onward)
 Mostly Drag n Drop
 Highly mobile oriented
 Widgets
 Micro blogging
 Cloud and Grid Computing
 Open ID
 Semantic Search
 Semantic Techniques like RDF, SWRL, OWL etc.

8. • Web page is a document available on world wide web. Web
Pages are stored on web server and can be viewed using a web
browser.
• A web page can contain huge information including text,
graphics, audio, video and hyper links. These hyper links are the
link to other web pages.
• These documents are written in HTML (hypertext markup
language) and are translated by your Web browser. Web pages
can either be static or dynamic.

9. • A Web page is not the same thing as a Web site. A Web site is a
collection of pages. A Web page is an individual HTML
document.
• Collection of linked web pages on a web server is known
as website. There is unique Uniform Resource Locator (URL) is
associated with each web page.

10. Structure of Website

12. Types of Websites

13. • Static web pages are also known as flat or stationary web page.
They are loaded on the client’s browser as exactly they are
stored on the web server. Such web pages contain only static
information. User can only read the information but can’t do any
modification or interact with the information.

14. HTTP REQUEST
RESPONSE

15. • A dynamic website can contain client-side scripting or server-
side scripting to generate the changing content, or a
combination of both scripting types. These sites also include
HTML programming for the basic structure. The client-side or
server-side scripting takes care of the guts of the site.
• It is possible to change a portaion of a web page without
loading the entire web page. It has been made possible
using Ajax technology.

16. HTTP REQUEST
ASK FOR DATA
Receive Data & create a
webpage using PHP
Script
RESPONSE