This paper discusses the four stages of computer network from its establishment to its rapid development. It also explains the advantages and disadvantages of each period, and explains the terms appearing on the computer network. For example, the computer network is a network that uses communication lines and communication equipment to communicate data between multiple computer systems scattered in different places according to international standards with functional link protocols, and a computer cluster that shares network hardware, software and database resources. Computer network can only run with the support of different network operating systems and network protocols, and the composition of computer network system is also discussed. With the gradual deepening of computer network, cyber crime has gradually become a common form of crime, which is seen from the current situation of cyber crime in the world. The reasons and solutions are discussed, which attracts public attention and hopes to further improve the existing network management system in China in terms of legislation and justice. So as to form an effective crime prevention and control network. I have expressed my views on the future development of the Internet.

key word

Network; Three stages; Hackers; information superhighway