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HomeCommon ProblemWhat network did the internet first originate from in the U.S. Department of Defense?

The internet originated from the ARPAnet network of the U.S. Department of Defense. The Internet originated from a computer network called ARPANet established by the U.S. Defense Advanced Research Projects Agency. One of the very important achievements of ARPANet is the Internet Protocol (IP) and the Transmission Control Protocol (TCP).

What network did the internet first originate from in the U.S. Department of Defense?

The Internet is a collection of global information resources. There is a rough saying that INTERNET is a logical network formed by the interconnection of many small networks (subnets), and each subnet is connected to several computers (hosts). The Internet aims to exchange information resources with each other, is based on some common protocols, and is formed through many routers and the public Internet. It is a collection of information resources and resource sharing.

The Internet originated from the Pentagon in the United States. Its predecessor was the ARPAnet developed by the Advanced Research Projects Agency (ARPA) of the U.S. Department of Defense.

In the late 1950s, we were in the midst of the Cold War. At that time, the U.S. military built a military network called "Arpa" by the Advanced Research Projects Agency (ARPA) of the U.S. Department of Defense so that when its computer network was attacked, even if part of the network was destroyed, the rest could still maintain communications. ARPAnet.

ARPAnet (ARPAnet) was officially launched in 1969. At that time, only 4 computers were connected for scientists to conduct computer networking experiments. This was the predecessor of the Internet.

By the 1970s, ARPAnet had dozens of computer networks, but each network could only communicate with computers within the network, and different computer networks still could not communicate with each other. To this end, ARPA has established a new research project to support relevant research in academia and industry. The main content of the research is to use a new method to interconnect different computer local area networks to form an "Internet." Researchers called it "internetwork", or "Internet" for short, and the term has been used ever since.

In 1974, protocols for connecting packet networks appeared, including TCP/IP - the famous Internet Protocol IP and Transmission Control Protocol TCP. These two protocols cooperate with each other. IP is the basic communication protocol and TCP is the protocol that helps IP achieve reliable transmission.

TCP/IP has a very important feature, which is openness, that is, the specifications of TCP/IP and Internet technology are both public. The purpose is to enable computers produced by any manufacturer to communicate with each other and make the Internet an open system. This is an important reason for the rapid development of the Internet later.

ARPA accepted TCP/IP in 1982, selected the Internet as the main computer communication system, and converted other military computer networks to TCP/IP. In 1983, ARPAnet was divided into two parts: one for military use, called MILNET; the other part, still called ARPAnet, was for civilian use.

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