Internet

Internet

 

Internet stands for lnternational Network, which began in 1950’s by Vint Cerf known as the father of internet. The internet is a world wide network of networked computers those are able to exchange information with each other.

The data move around the Internet is controlled by protocols. Protocol refers to the set of rules applicable for a network. Some of the commonly used protocols are

1. TCP/1P (Transmission Control Protocol/ Internet Protocol),

2. HTTP (HyperText Transfer Protocol)

3. PPP (Point-to-Point Protocol)

4. FTP (File Transfer Protocol)

5. Telnet Protocol

6. WAP (Wireless Application Protocol)

7.Usenet Protocol

Internet Connections

Some of the Internet connections available for Internet access are

1. Dial-up connection

It is a method of connecting to the Internet using an existing telephone. The modem connects the computer through the standard phone lines, which serve as the data transter medium.

2.Broadband connection

The term commonly refers to high speed Internet access that is always on and faster than the traditional dial-up access. It uses a telephone line to connect to the Internet.

Broadband includes several high speed transmission
technologies such as (i) DSL (Digital Subscriber Line) (i) Cable Modem (iii) Fibre Optic (iv) BPL (Broadband over Power Line).

3. Wireless Connection

Wireless broadband connects a home or business to the Internet using a radio link between the customer’s location and the service
provider’s facility.

Some ways to connect wirelessly are (i) Wi-Fi(Wireless Fidelity),           (i) WiMAX (Worldwide Interoperability for Microwave Access),           (iii) Mobile Wireless Broadband Service, (iv) Satellite

Terms Related to Internet :-

  Some of the important terms related to internet are

(i) World Wide Web

(WWW) The WWW is a system of Internet servers that supports hypertext and multimedia to access several Internet protocols on a single interface.

(ü) Web Page

The backbone of the world wide web is made of files, called pages or web pages, containing information. It links to resources both text and multimedia throughout the Internet. It is createdusing HTML

(iii) Website

A group of web pages that follow the same theme and are connected together with hyperlinks is called ‘website’. e.g. http://www.carwale.com is a
website while http://www.carwale.com/new/ is a web page. The first page of website is known as home page.

(iv) Web Browser

It is a software application that is used to locate, retrieve and also display content on the World Wide Web, including web pages. There are two types of web browsers
(a) Text Web Browser e.g. Lynx
(b) Graphical Web Browser e.g. Internet Explorer,Firefox, Netscape, Safari, Google Chrome, Opera etc.

(v) Web Server

It is a computer program that serves requested HTML page or file

(vi) Web Address and URL

A web address identifies the location of a specific web page on the Internet. URL stands for Uniform Resource Locator. e.g.
“http://www.google.com/services/index.htm
http:// Protocol identifier
www// World Wide Web
google.com > Domain name
/services/Directory
index.htm> Web page

(vii) Domain Name

It is a way to identify and locate computers connected to the Internet. A domain name must be unique. It always have two or more parts,separated by period/dot (). Most common domain abbreviations for organisations are info
info- Informational Organisation
com -Commercial
gOv-GOvernment
edu- Educational
mil– Military
net -Network Resources
org -Non-Profit Organisation
Some domain abbreviations for country are
in -India
au -Australia
fr-France
nz- New Zealand
uk -United Kingdom

(viii) Newsgroups

An area on a computer network especially the Internet, devoted to the discussion of a specified topic is known as Newsgroup

(ix) Search Engine

It is a website that provides the required data on specific topics. Search engines turn the web into a powerful tool for finding information on any topic

Here are some of the most popular search engines
Google http://www.google.com
Alta Vista – http://www.altavista.com
Yahoo – http://www.yahoo.com
Hotbot – http://www.hotbot.com

Services of Internet 

An Internet user can access to a wide variety of services such as Electronic Mail (E-mail), Video Conferencing, Electronic Learning, Electronic Banking,
Electronic Shopping, Electronic Reservation, Electronic Commerce, Mobile Commerce, Social Networking etc

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