Table of Contents

What is World Wide Web (WWW) ?

History of World Wide Web :-

The World Wide Web was invented by Tim Berners-Lee in 1989, in 1995 the first connection was established over what is today known as the Internet.
By the end of 1990, the first Web page was served. In April 1993, the World Wide Web technology was available for anyone to use on a royalty-free basis.
Since that time, the Web has changed the world. It has perhaps become the most powerful communication medium the world has ever known.
A global Web of computers known as the Internet, allows individuals to communicate with each other often called the World Wide Web. The Internet provides a quick and easy exchange of information and is recognized as the central tool in this Information Age.

World Wide Web (WWW) Definition :-

The World Wide Web (WWW) is an internet based service, which uses common set of rules known as Protocols, to distribute documents across the Internet in a standard way.
The World Wide Web, or ‘Web’ is a part of the Internet. The Web is viewed through web browser softwares such as Google Chrome, Internet Explorer, Mozilla Firefox etc. Using browsers one can access the digital libraries containing innumerable articles, journals, e-books, news, tutorials stored in the form of web pages on computers around the world called Web Servers. Today thousands of web pages/websites are added to the WWW every hour.

Difference between Internet and WWW :-

The Internet is known as “interconnection of computer networks”. The Internet is a massive network of networks. 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. Information that travels over the Internet does so via a variety of languages known as protocols.
The World Wide Web, or “Web” for short, or simply Web, is a massive collection of digital pages to access information over the Internet.
The Web uses the HTTP protocol, to transmit data and allows applications to communicate in order to exchange business logic. The Web also uses browsers, such as Internet Explorer or Firefox, to access Web documents called Web pages that are linked to each other via hyperlinks. Web documents also contain graphics, sounds, text and video.

Search Engines :-

Search engines are the programs which are needed to extract the information from the internet. They play a very important role in our daily routine, as today for each and every information we are dependent on internet.
Web search engines work with the help of two programs, Spider which fetches as many documents as possible. Another program, called an indexer, reads the documents and creates an index based on the words contained in each document. Each search engine uses an algorithm to create its indices such that, only related results for specified keywords is stored and returns a list of the documents where the keywords were found.

A search engine works in the following order:

Web crawling: Web search engines work by storing information about many web pages. These pages are retrieved by the program known as Web crawler – which follows every link on the site. Web crawler may also be called a Web spider.
Indexing: Indexing also known as web indexing, it stores data to facilitate fast and accurate information retrieval.
Searching: A web search query fetches the result from the web search engine entered by the user to meet his information needs.

Few search engines available are as follows:

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Important Point :-

❖ The World Wide Web (WWW) is an internet based service, which uses common set of rules known as Protocols, to distribute documents across the Internet in a standard way.
❖ The Internet is a massive network of networks. 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.
❖ Search engines are the programs which are needed to extract the information from the internet.
❖ A search engine works in the following order: Web crawling, Indexing, Searching
❖ A web server commonly known as HTTP server or application server is a program that serves content using the HTTP protocol.
❖ A Web page can contain an article, or a single paragraph, photographs, and it is usually a combination of text and graphics.
❖ A browser is a software that lets you view web pages, graphics and the online content.
❖ The Secure Sockets Layer (SSL) is a protocol, uses Hypertext Transfer Protocol (HTTP) and Transport Control Protocol (TCP) for managing the security of a message transmission on the Internet.
❖ A blog is a web site like any other, but it is intended to offer personal opinions of people on their hobbies, interests, commentaries, photo blogs, etc.
❖ URL’s, or ‘uniform resource locators’, are the web browser addresses of internet pages and files. It is the way to locate a file or document on the Internet.
There are two types of URL: Absolute and Relative.
A protocol is a set of rules that governs the communication between computers on a network.

Basic internet Computer Questions and Answers

Q: What is the internet?
(a) a single network
(b) a vast collection of different networks
(c) interconnection of local area networks
(d) none of the mentioned

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Answer ⇒ { B }

Q: What is an ‘intranet’?
(a) Internal internet is used to transfer information internally
(b) Internal internet is used to transfer information to the outside company.
(c) Internal network designed to serve the internal formational needs of a single organization.
(d) Internal network designed to transfer information between two organizations