Prepared by:Monares, Mayjyn G.

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 CERN

• 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

• 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,…)

• 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

• Semantic ComponentsSemantic Components– Hyper Text Transfer Protocol

(HTTP)– Hyper Text Markup Language

(HTML)•extensible Markup Language (XML)

– Uniform Resource Identifiers (URIs)

Four basic phases: connection request response close

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

<H1>, which means the page heading. The commands are enclosed in angle bracket.

URLs (UNIFORM RESOURSE LOCATORS), an Internet address.

Four parts:protocoldomain namePathFilename

Example:  http://home.mcom.com/home/internetsearch.html

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.

Students have access to a wide range of knowledge

Students can develop in socially relevant ways.

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.

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. 

Thank You for Listening Thank You for Listening