Tim Berners-Lee invented the World Wide Web in 1989-1990 at CERN as a way to share information between computers connected to the internet. The web uses browsers, HTML pages, and URLs to allow users to view and link between pages of text, images, and other multimedia. Users connect to web servers via HTTP and receive requested pages containing HTML markup that browsers interpret to display content. This system of clients, servers, and protocols allows the global sharing of information over the internet.

1. Prepared by:
Monares, Mayjyn G.

2. A way of exchanging information
between computers on the
internet.
The network of pages of images,
texts and sounds on the internet
which can be viewed using
browser software.
1989-1990- Tim Berners Lee
invents the World Wide Web at

3. • Clients use browser application to
send URIs via HTTP to servers
requesting a Web page
• Web pages constructed using HTML
(or other markup language) and
consist of text, graphics, sounds plus
embedded files
• Servers (or caches) respond with
requested Web page
– Or with error message

4. • Client’s browser renders Web page
returned by server
– Page is written using Hyper Text
Markup Language (HTML)
– Displaying text, graphics and
sound in browser
– Writing data as well
• The entire system runs over
standard networking protocols
(TCP/IP, DNS,…)

5. • Structural ComponentsStructural Components
– Clients/browsers – to dominant
implementations
– Servers – run on sophisticated
hardware
– Caches – many interesting
implementations
– Internet – the global infrastructure
which facilitates data transfer

6. • Semantic ComponentsSemantic Components
– Hyper Text Transfer Protocol (HTTP)
– Hyper Text Markup Language (HTML)
• extensible Markup Language (XML)
– Uniform Resource Identifiers (URIs)

7. Four basic phases:
 connection
 request
 response
 close

8. First, the user can use the
browser to connect with the server.
The browser works by using a
special protocol, which is called
HTTP to request a specially encoded
text from the web server. The text is
written in HTML, which tells the
browser how to display the text on
the user’s screen. . One can also use
ftp, gopher, wais, telnet and archive
to command the server to search for
the information desired. Web pages
are written in HTML

9. <H1>, which means the page
heading. The commands are enclosed
in angle bracket.
URLs (UNIFORM RESOURSE
LOCATORS), an Internet address.
Four parts:
protocol
domain name
Path
Filename

10. Example:
http://home.mcom.com/home/inte
rnetsearch.html

11. Hypertext system, which
allows a user to move from
document to document without
knowing the address of specific web
sites.
For example:
The text on the screen will
have some highlighted spots. One
needs only to click the mouse, and
the information will be pulled to the
screen in a few seconds.

12. Students have access to a wide range
of knowledge
Students can develop in socially
relevant ways.

13. The Internet is a massive network of
networks, a networking
infrastructure. It connects millions
of computers together globally,
forming a network in which any
computer can communicate with any
other computer as long as they are
both connected to the Internet.

14. The World Wide Web, or simply Web,
is a way of accessing information
over the medium of the Internet. It
is an information-sharing model that
is built on top of the Internet.

15. Thank You for ListeningThank You for Listening 