What is Internet and Its History – ARPA to DARPA

What is Internet and It History - ARPA to DARPAThe Internet is a vast network of networks that electronically connects millions of people worldwide. It was formed in 1968, when the U.S.
Department of Defense’s Advanced Research Projects Agency (ARPA) funded what would become the first global computer network, the Advanced Research Projects Agency Network (ARPANET).
ARPA later became the Defense Advanced Research Projects Agency (DARPA). The ARPANET allowed university and government engineers to research and work from any location on the network.
ARPANET’s design featured multiple hosts and multiple connections among those hosts, which greatly reduced the chances of total network failure.
There was no central hub, which would have created a point of vulnerability; rather, control was spread throughout the network. This decentralization resulted in a robust and reliable network that would continue to function even if some of the hosts were incapacitated.
In the late 1980s, the Department of Defense decommissioned the ARPANET, and all the sites switched over to the National Science Foundation (NSF) network, called NSFnet. The NSF had increased the number of supercomputers to five in 1986 and added access to more networks, expanding the range of sites for businesses, universities, and government and military installations. The NSFnet, plus thousands of others, compose what has become the largest network of networks: the Internet.
In the years that followed, more private companies joined the Internet. The hardware and communications links required to connect to the Internet were funded by a combination of private and government money.
Despite continued predictions by some users that increasing business involvement would severely disable the Internet, growth has continued at an astounding rate. Business people everywhere see that connecting to the Internet via the Web is a good value, and they are willing to fund its phenomenal growth by paying for better, faster access.


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