Computer network refers to a computer system that connects multiple computers with independent functions located in different geographical locations and their external devices through communication lines, and realizes resource sharing and information transmission under the management and coordination of network operating system, network management software and network communication protocol.

In addition, from the logical function point of view, computer network is a collection of computer systems that connect multiple computers with communication lines for the basic purpose of transmitting information. A computer network consists of transmission media and communication equipment.

From the user's point of view, a computer network is defined as having a network operating system that can be automatically managed by users. It calls the resources called by users, and the whole network is like a large computer system, which is transparent to users.

Combating crimes committed by computer networks;

At present, there are five trends in using computer networks to carry out illegal and criminal activities: first, cases of using computers to make, copy and disseminate obscene articles are prominent; Second, the cases of using computer networks to infringe on public and private property are on the rise; Third, the number of cases endangering the security of computer information networks has increased significantly; Fourth, the number of cases of infringing citizens' personal rights and democratic rights by using computer networks has increased; Fifth, the number of cases that use the Internet to endanger national security continues to rise.

Zhu Entao, assistant minister of public security, pointed out that it is necessary to strengthen the supervision of computer network security and fully safeguard national security and social stability. Especially with China's accession to the WTO, the situation of information network security has changed greatly, and it is necessary to prevent the spread of harmful information, computer viruses, hackers' attacks and leaks.

Refer to the above? Baidu Encyclopedia-Computer Network? China News Network-China stepped up efforts to crack down on computer network crimes.