The Internet, also known as the Internet, has a history of more than 20 years. Its predecessor is the American Defense Computer Internet (ARPA), and now it has developed into a global computer internet. This network is the computer network with the richest information resources in the world, and is recognized as the embryonic form of the future international information superhighway.
There are tens of thousands of technical data databases on the Internet, and their information media include data, images, words, sounds and other forms. Information attributes include data, exchange software, books, files and other categories; Information content involves communication, computer, agriculture, biology, astronomy, medicine, politics, law, military affairs, music and other aspects.
At present, there are four Internet companies operating in China, namely: China Net operated by China Telecom; China Jinqiao Information Network (GB-net, operated by Jitong Company); China Unicom Computer Internet (UNI-net, operated by Unicom); And China Netcom Computer Internet (CNC-net, operated by China Network Communication Co., Ltd.). In addition, there are China education and scientific research computer Internet (CER network, managed by the Ministry of Education), cstnet (CST-net, managed by China Academy of Sciences) and other private Internet. All the above backbone networks can access the Internet through the national gateway.