1946 the world's first electronic computer came out more than ten years ago, because of its high price, the number of computers was very small. The so-called computer network in the early days was mainly produced to solve this contradiction. Its form is to directly connect a computer with several terminals through communication lines. We can also regard this method as the simplest prototype of LAN.
The earliest Internet was established by the Advanced Research Projects Agency (ARPA) of the US Department of Defense. Many concepts and methods of modern computer network, such as packet switching technology, all come from ARPAnet. ARPAnet not only studied the packet switching technology of leased line interconnection, but also studied the packet switching technology of wireless and satellite networks, which led to the emergence of TCP/IP.
In 1977- 1979, ARPAnet introduces the current TCP/IP architecture and protocol.
Around 1980, all the computers on ARPAnet started the conversion of TCP/IP protocol, and the initial Internet with ARPAnet as the backbone network was established.
1983, all ARPAnet computers completed the conversion to TCP/IP, and realized TCP/IP on UNIX (BSD 4.1). The biggest contribution of ARPAnet in technology is the development and application of TCP/IP protocol.
During the period of 1985, the National Science Foundation (NSF) adopted TCP/IP protocol to connect six supercomputing centers serving scientific research and education in the United States, and supported regional networks to form NSFnet.
From 65438 to 0986, NSFnet replaced ARPAnet as the backbone of the Internet.
1988 the internet began to open to the outside world.
199 1 June, 2006, among computers connected to the Internet, commercial users surpassed academic users for the first time, which was a milestone in the development history of the Internet, and the growth rate of the Internet was out of control.