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Internet


What is Internet?

Internet refers to a global network that connects a large number of computers, by using routers. All computers on the internet communicate with one another using the Transmission Control Protocol/Internet Protocol (TCP/IP).


Evolution of Internet

The foundation of the internet was given in the year 1969 when the US Department of Defence sponsored a project to connect itself with the different universities to share information with their colleagues in other U.S. cities. The project was named ARPANET (Advanced Research Projects Network) .The main motive behind this project was to develop a secure network that survives and works even after nuclear attack. By 1971 there were 30 universities participating in ARPANET. Computers in ARPANET use certain rules to communicate with each other. These set of rules are termed as Protocols. The protocol used by ARPANET was NCP (National Control Protocol). By the time NCP was out of use and TCP/IP came into the world of networking. TCP converts the messages into chunks of packets at the source, which could be transmitted easily and reassembles all these packets at the destination. IP handles the dispatch of these packets. This way ARPANET started growing and became a massive network of networks – the Internet. The term Internet was used for the first time in 1982.
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