Internet

Introduction to Internet

Internet is a collection of millions of computers around the world that are all connected to one another. It is a global network of computers. These computers are connected through high speed telecommunication devices.

History:Early 1960 during cold war of Russia and America.

American wanted to communicate with Armed Forces. A network of four computers was developed in the beginning. Project handed to DARPA (Defense Advanced Research Project Agency) to connect Defense Companies.

Universities and research organizations started their own networks

SHORT CUT TO REMEMBER

WET FIGCE Www E-mail Telnet FTP Intranet Gopher Chat Group Extranet

WWW:

It is a collection of millions of websites. A web site contains different web pages containing information. It organizes this information in such a way that user can easily search and access the required information.

E Mail:

Stand for electronic mail. It is the exchange of messages and files using internet. Message can be in the form of graphics, sounds, video clips or simple text. It is the fast way of sending messages anywhere in the world in a very short time.

TelNet:A program that is used to connect to a remote

computer on internet. A computer can act like a terminal directly linked to the remote computer. It allow a user to logon to a remote computer. The user can logon to the computer and use it as if he is connected to the computer directly.

FTP:Used on internet for sending files from one

place to another. Audio, video, graphics and data files can be uploaded or downloaded using this protocol.

The process of transferring a file from remote computer to a local computer is called downloading. The process of transferring a file from a local computer is called uploading. Different software are available to use this protocol e.g: cuteFTP and WS_FTP.

IntraNet:

It is a private and secure business network. It uses Internet technology to provide information to the employees of the organization.The information can be protected from unauthorized users. It is designed to meet the internal needs for sharing information within a single organization or company.

Gopher:A menu based system for exploring the internet

and its resources. It provide the facilities for search and file retrieval on the internet.

It organizes resources in such a way that finding information becomes easier on the internet.

Chat Group:

Exchanging view on the internet by typing text messages. It is a group of users with similar interest. Many users join chat group for exchanging views or talking for fun. The user can interact with one another in real-time. It mean that they are online at the same time.

ExtraNet:It is a collection of two or more intranets.

It can be accessed by authorized users from outside the organization . Different organizations can use extranet to share the information of their intranets. An organization can apply security measures to provide limited access to the employees of other organization using the extranet.

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