BASIC UNDERSTANDING OF INTERNET AND WEB

BRIDGE COURSEof

INFORMATION & COMMUNICATION TECHNOLOGY

Activity No. 8

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Objective s of the activity

On the completion of this activity, students are able to

Learn basics of InternetKnow types of NetworkLearn how to access the InternetLearn the structure of World Wide Web

(www)

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Types of Network

Network : It is a collection of interconnected computers and other devices to share information , files and hardware resources.Basic Types :

LAN MAN WAN

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LOCAL AREA NETWORK

A LAN (local area network) is a group of computers and network devices connected together, usually within the same building / site. 

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METROPOLITAN AREA NETWORK

A MAN (metropolitan area network) is a larger network that usually spans several buildings in the same city or town. A metropolitan area network (MAN) is a network that interconnects users with computer resources in a geographic area or region larger than large local area network (LAN) but smaller than the area covered by a wide area network (WAN).

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WIDE AREA NETWORK

A wide area network (WAN) is a computer network that spans a relatively large geographical area and consists of two or more interconnected local area networks (LANs)

The Internet is an example of a worldwide public WAN.

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What is the Internet?

Internet is an inter-connection between several computers of different types belonging to various networks all over the globe.

It is a network of networks.

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WHAT IS WEB ?

The Web is a world of information available at the click of a mouse. To use it, you need a computer/Smart phones, a connection to the Internet, and a Web browser.

WWW (World Wide Web) : WWW is a series of servers that are interconnected through hypertext.

Hypertext is a method of presenting information in which certain text is highlighted (Hyperlink) that, when selected, displays more information on the particular topic.

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Common Terminologies related to www are:

Web Browser

Web Server

Homepage

HTML

HTTP

URL

ISP

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Web Browser

Web Browser— The browser is the program which is necessary for surfing the internet.

For Example :Google ChromeMozilla FirefoxOperaSafari Internet Explorer

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Web Server

Web server—is a place where web pages reside. When User request , it responds with required web page on user’s computer.

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HomePage,HTML,HTTP

Home page—is the first hypertext document displayed when the user follows a link to the Web server.

Hypertext Markup Language (HTML)—is the encoding scheme used to create

a Web document.

Hypertext Transfer Protocol (HTTP)—is a protocol used on the Web to transfer hypertext documents. A protocol is a set of rules that the computers use to communicate logically.

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URL,ISP

Uniform Resource Locator (URL)—is a Web addressing scheme that spells out the exact location of an Internet resource. When the user clicks on a link, the browser reads the link to the document. The information about the link is provided to the browser by the URL.

http:// www.google.comhttp:// www.gtu.ac.in

Internet Service Provider (ISP) : An Internet service provider (ISP, also called Internet access provider) is a business or organization that offers users access to the Internet and related services.

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ACCESSING INTERNET

To access internet , users need to contact ISPlike BSNL , MTNL etc.

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Entering a URL in Browser

Location BoxEnter URL’s here(or Web Address)

http://www.gmail.com

http://www.gmail.com Press Enter

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Response in web browser

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References

http://en.wikipedia.orghttp://en.wikipedia.org/wiki/Computer_netwo

rkhttp://www.google.com/imghp