Subject: Computer Science
The internet is the largest network that connects millions of computer around the world. It is also known as networks of networks. It provides data, information and other services to the client computers.
By using telephone line or normal modem, we can connect internet in personal computer. The Internet Service Provide is a company that provides the Internet facility to the users. A computer can be connected to the Internet using Integrated Service Digital Network (ISDN), cable line, leased line and satellite. Nepal Telecom (NTC), World link, etc are some ISPs of Nepal.
The first idea of an internet was developed by J.C.R Licklider of MIT in 1962. During late 1962 the project was given to defense advanced research projects agency. Later this project was developed into ARPANET in 1969. This was a joint venture between DARPA and Robert. The basic idea of internet was, multiple connected computers transmitting data to each other. In mid 1980s, National Science Foundation funded ARPANET after DARPA left the project. NSF established five "Supercomputing Centers" that were available to anyone who wanted to use them for academic background.
In 1990, the original ARPANET was shut down because the commercial internet backbone has replaced it. This internet was the initial phase of themodern internet. Since then the internet has grown to become one of the world's largest network.
Some of the services provided by the Internet are as follows:
Internet is the largest computer network that can connect millions of computers around the world. It connects several thousands computer networks all over the world. So, it is known as networks of networks. The internet is an information superhighway and has logically connected the world into a cyber village. Some common services of the internet are:
1) World Wide Web
7) Downloading and Uploading files
Some Internet security measures are:
The process of copying of a file or data program etc. from a remote computer (web server) to the requesting computer (user computer) is called downloading. The process of copying a copy of a file or document or program from a user's computer to the remote computer (Web Server) is called uploading.
Intranet is a privately maintained computer network which is control by company or an organization. It uses all the features of the internet and is accessible only by employee or members. Extranet is also private network that uses Internet protocol connectivity. An extranet can be viewed as part of a company. Intranet that is extended to users outside the company or branch of organization through the internet.
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