Developer helper: WORLD WIDE WEB

What is the World Wide Web?
The World Wide Web (WWW) is a global interactive, dynamic, cross platform, graphical hypertext information system that runs on the Internet.

What is WWW ?

WWW is a system for creating and browsing distributed HyperTexts. WWW hypertexts link machines around the globe. They contain links to

files, newsgroups, ftp, telnet, gopher, archie, and WAIS .

HYPERTEXT

What is “The Web”

Hypermedia means that you can retrieve text, sounds (music or spoken language), movies, or pictures.
You are only limited by your computer’s hardware and software.

Enter the World Wide Web

With a Web client, users can access the internet
Seek scientific information
Surf for the heck of it
Buy and sell products and information

What is a Web Page?

A Web Page is a single document written in HTML (Hyper Text Mark-up Language) that includes the text of the document, its structure, any links to other documents and graphic images and other media.

Jargon for the Internaut ....

HTTP ,
HyperText Transfer Protocol is the stateless protocol used for data transfer within WWW.
HTML ,
WWW documents are authored using the HyperText Markup Language ,a subset of SGML.

Jargon for the Internaut ...

World Wide Web Client

A client /browser is a program that enables you to access the World Wide Web .

Formatted text with fonts
Inline / External images
Sound
Video
Java
VRML and more ...

What is a Web Browser?

A Web Browser is special software such as Netscape, Mosaic or Internet Explorer. These browsers allow a user to view Web pages delivered from a client server (Web Site) situated at a particular URL on the World Wide Web.

Clients galore ...

Character Based Lynx
Graphical User Interface Netscape Navigator, Cello, PowerBrowser, Cyberjack, Microsoft Internet Explorer, Mozilla Firefox, NCSA Mosaic , Spyglass Mosaic , HotJava,WebSurfer, and many more ...

Internet Explorer

Mozilla Firefox

Search Engines on the WWW

Tools on the WWW used to search and find web sites related to a particular topic
provide for searching using keywords and boolean operators
Popular ones are Google, Alta Vista, Infoseek, HotBot,Web Crawler, Lycos and Yahoo
Over 600 + at present

World Wide Web Server

A Web Server is the software on an Internet site that enables Web Browsers to access HyperMedia Documents sitting

on the Web site .

Homepage is a HyperText document a server will serve as default .

How a server works !?!

The Client request received at the port where server daemon is waiting
The request is interpreted following the Rule Set defined at the server
The server sends a response containing a status code and the text of the document, if available