World wide web

It’s networking…
World Wide Web

Index
What is internet History of internet
What are some services found on
the Internet Who controls internet
What is world wide web
Portals
History of world wide web
Search engines
Web browser Hyperlinks

Difficult to imagine ?
World Before internet

A global computer network providing a variety of
information and communication facilities, consisting
of interconnected networks using standardized
communication protocols.
What is INTERNET???

History of the Internet
How did the Internet originate?
Goal:
To function if
part of network
were disabled
Became
functional
September 1969
ARPANET
Networking project by
Pentagon’s Advanced
Research Projects
Agency (ARPA)Goal:
To allow scientists
at different
locations to share
information

History of the Internet
How has the Internet grown?
p. 9
Today
More than 500 million host nodes
1984
More than 1,000 host nodes
1969
Four host nodes

What are some services found on
the Internet?

• Email
• E-Commerce
• Social Media
• Unlimited information
• Making presentations(Just like this one !)
• World Wide Web(WWW)
Some of the Services

World Wide Web Consortium (W3C)
 Oversees research, sets standards and guidelines
 Mission is to contribute to the growth of the Web
 Nearly 400 organizations around the world are members of
the W3C
Who controls the Internet?
 No one—cit is a public, cooperative, and
independent network
 Several organizations set standards

A worldwide collection of electronic documents
Each electronic document is called a Web page
Also called the Web
Can contain text, graphics, audio, video, and built-in connections
A Web site is a collection of related Web pages
What is the World Wide Web (WWW)?

The term WWW refers to the World Wide Web or simply
the Web.
The World Wide Web consists of all the public Web sites
connected to the Internet worldwide, including the
client devices that access Web content.
The WWW is just one of many applications of the
Internet and computer
What is the World Wide Web (WWW)?

• Founded by - Tim Berners-Lee at the European Laboratory for
Particle Physics(CERN).
• He developed a software application for a hypertext server
program which stores documents and makes it available on the
internet
• Which he named as WORLD WIDE WEB.
• Developed To- try to improve the CERN’s research document
handling and sharing mechanism.
History of WWW

• In 1993, Marc Andreessen wrote a program named ‘mosaic ‘
which could read the documents in hypertext format
• Which was later named as “WEB BROWSER”
• Because of web browser people could easily access internet.
• It was a free software.
• “NETSCAPE NAVIGATOR” was the first web browser ,which was
based on mosiac.
History of WWW

A web portal is most often one specially
designed Web page which brings
information together from diverse
sources in a uniform way.
Usually, each information source gets
its dedicated area on the page for
displaying information.
Portals

A program that searches for and identifies
items in a database that correspond to
keywords or characters specified by the
user, used especially for finding particular
sites on the World Wide Web.
Search engine

• A web server is a program running on a server computer .it consist
of the website containing a no. of web pages.
• Web pages are designed on a language called HTML.
• Each web page can contain text , graphics, sound, video and
animation .
Web server

• The web server receives request for a web page from a browser
program running on the client.
• Then it locates that the corresponding page and sends it to the
client computer.
• In this TCP connection the client sends one request and the server
ine response.
• This request –response model is governed by a protocol called
HYPERTEXT TRASFER PROTOCOL(HTTP).
• The most popular web servers are Apache , IIS.
Working of web server

A web browser (commonly
referred to as a browser) is a
software application for
retrieving, presenting and
traversing information
resources on the World Wide
Web.
An information resource is
identified by a Uniform
Resource Identifier (URI/URL)
and may be a web page,
image, video or other piece
of content.
Web browser

Working of a Web browser
Step 1.
Click the Web
browser program
name
Step 2.
Web browser
looks up the
home page
setting
Step 3.
The Web browser
communicates with
the access
provider’s server to
retrieve the IP
address. The IP
address is sent to
your computer.
Step 4.
The home page
displays in the
Web browser

A uniform resource identifier (URI) is a string of characters used to
identify a name of a resource. Such identification enables
interaction with representations of the resource over a network,
typically the World Wide Web, using specific protocols.
URI/URL

A hyperlink is a reference to data that the reader can directly follow either
by clicking or by hovering. A hyperlink points to a whole document or to a
specific element within a document. Hypertext is text with hyperlinks.
Hyperlink

Internet vs WWW
Internet World Wide Web
Estimated year of Origin 1969, though opening of the
network to commercial
interests began only in 1988
1991
Name of the first version ARPANET NSFnet
Comprises Network of Computers,
copper wires, fibre-optic
cables & wireless networks
Files, folders & documents
stored in various computers
Governed by Internet Protocol Hyper Text Transfer Protocol
Dependency This is the base, independent
of the World Wide Web
It depends on Internet to work
Nature Hardware Software

World wide web

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