The Internet is a computer network established by the United States Department of Defense in 1969, through a project called ARPANET ARPA (Advanced Research Project Agency Network), where they demonstrate how the hardware and UNIX-based computer software, we can do within a short distance communication infinity through the phone line. ARPANET project designing a network, reliability, how much information can be transferred, and finally all the standards that they set into the embryo of a new protocol development is now known as TCP / IP (Transmission Control Protocol / Internet Protocol).
The initial purpose of the construction project was for military purposes. At that time the United States Department of Defense (U.S. Department of Defense) create a computer network system that is spread by linking computers in areas vital to address the problem in case of nuclear attack and to avoid the occurrence of centralized information, which in the event of war can be easily destroyed.
At first ARPANET only connecting 4 sites, ie the Stanford Research Institute, University of California, Santa Barbara, University of Utah, where they form a single integrated network in 1969, and in general the ARPANET was introduced in October 1972. Not long after the project is growing rapidly in all regions, and all universities in the country wanted to join, thus making it difficult to set the ARPANET.
Therefore, ARPANET split widened two, namely "MILNET" for military purposes and the "ARPANET" new smaller for non-military purposes such as, universities. Combined both networks eventually known as the DARPA Internet, which then reduces to the Internet.
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