2 1 century, the rapid development of computer technology has promoted the economic and social progress of the whole world. With the rapid development of human science and technology, computer technology has become more and more popular and widely used. The following is what I arranged for you for your reference.

Fan: Computer network security problems and preventive thinking Abstract With the continuous development of computer network technology, more and more people begin to use this technology in their lives and work, and many important materials are stored in computers in the form of electronic files. Because there are many hidden dangers in the computer network, the security of information has also been greatly threatened. Therefore, relevant personnel need to pay more attention to and study the security of computer networks, find out effective countermeasures and improve the security of information. In this paper, computer network security problems and preventive measures are studied and discussed.

Keywords computer; Network security; counter-measure

In recent years, with the improvement of economic level and scientific and technological level, the application of computer technology has become more and more extensive, computer network has become an indispensable part of people's work and life, and the security of computer network has also begun to attract people's extensive attention. At present, people have taken many technical measures to deal with this problem, but various security problems still appear frequently. Relevant personnel need to strengthen the research on the preventive measures of computer network security problems to ensure the safety of computer network use.

1 Overview of Computer Network Security

Computer network security mainly includes computer system software, hardware and information. The protection of computer network security is to take systematic and comprehensive measures to prevent users' computer data from being destroyed and tampered with, and to provide effective guarantee for its security implementation. At present, the number of computer network users in China is huge, and it is difficult to centralize management and supervision. Computer network security problems occur frequently, and the frequency of hacker attacks on some institutions and financial institutions is also increasing, which not only causes huge economic losses, but also has a negative impact on the harmonious development of society. Therefore, China must strengthen the research of computer network security measures, improve the level of security, create a safe and healthy network environment, and ensure the development of China's economy.

2. Analyze the security risks existing in the computer network

2. 1 physical security risk analysis

Physical security refers to the security protection of stored and transmitted information at the level of physical media. It is the most basic guarantee in computer network security and needs to be paid attention to by relevant personnel. Natural disasters, human error, electromagnetic radiation, etc. Will pose a certain threat to computer network security.

2.2 computer network system security risk analysis

No matter what kind of computer system or network software, there will be more or less loopholes, especially the pirated operating system downloaded by some users on the website in order to save money, which has many security loopholes, resulting in great security risks in the computer network system used by users. Not only can some lawless elements easily use these loopholes to invade users' computers, but in the process of computer network application, it is also very likely that the whole computer will be paralyzed due to the problems of the system itself, which will cause great losses to users.

2.3 computer virus security risk analysis

Computer virus is a common problem in computer network security risks. It can spread through hard disks, mobile devices, networks and other carriers. Once in the computer, it will copy itself, constantly destroying the important data in the computer, slowing down the execution speed of the computer, and even causing the computer to be paralyzed, which is extremely harmful to users.

2.4 security risk analysis of hacker intrusion

Hacking attack is mainly an act of invading the user's computer through the artificial operation of criminals and taking advantage of the loopholes in the computer system to achieve a certain purpose. This kind of behavior has a strong purpose, usually in order to obtain more economic benefits, and it is an operation such as stealing confidential information, destroying important information, and tampering with information. Once the user's computer is hacked, the data will be lost or destroyed and the system will be paralyzed.

2.5 Analysis of user operation safety hazards

Computer network system is mainly operated and used by users. In practice, many users pay less attention to computer network security issues, and do not install firewall and computer network security protection software, which leads to more loopholes in the system and provides opportunities for hackers to invade. At the same time, the user password setting is too simple, the system backup is incomplete, and the software is misoperation, which also lays a huge security risk for the computer network system.

3 Effective measures to prevent computer network security problems

3. 1 Improve the computer network security management mechanism

Computer network security is not only related to network technology, but also closely related to management. Relevant departments should strengthen the improvement of computer network security management mechanism, establish corresponding laws and regulations, and improve the professional skills and professional quality of network security supervision and network management personnel. At the same time, we should publicize the safety precautions to the vast number of computer network users, enhance their awareness of safety precautions and computer maintenance, correctly guide their computer operation behavior, try to avoid computer network security problems caused by physical factors and human operation errors, and maintain computer network security in many ways.

3.2 the use of firewalls to prevent security problems

The improvement of network system's own security is an important part of computer network security, and firewall technology is the most widely used and effective technology at present. By setting a protective barrier between the Internet and the internal network of the computer system, the anti-attack efficiency of the system itself is improved, so as to realize the security maintenance of the computer network system. At the same time, the firewall can also filter the information before it reaches the computer according to the user's own network execution environment, so as to prevent dangerous data from entering the user's computer, thus effectively preventing security problems.

3.3 Install antivirus software to isolate viruses.

With more and more computer viruses, various anti-virus software began to appear. These anti-virus softwares often have high virus killing and isolation capabilities, and can form a virus database by collecting various computer virus-related data. When users use anti-virus software to scan computer data files, the software can compare user data with virus database data, and once similar features are found, they will be automatically isolated or deleted to ensure the safety of the user's computer network system.

3.4 Using encryption technology to maintain system security

In the application of computer network system, users can prevent data from being intercepted and stolen through file encryption or digital signature technology, at the same time, improve the security intensity of user account passwords, try to set more complicated passwords and change them regularly to enhance their own security awareness, and back up important data in time to ensure that data integrity can be maintained even after data is destroyed or the system is paralyzed.

4 conclusion

Computer network security is a long-term problem that people face. This not only requires the relevant departments to strengthen management, but also requires users to enhance their own safety awareness and actively use firewalls, anti-virus software and encryption technologies. Maintain the security of computer network system, ensure the security of user information, and give full play to the convenient functions of computer network system.

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Fan: The application of computer network technology in electronic information engineering Abstract Electronic information engineering is a kind of engineering based on computer network technology and computer software technology, which has great application in communication, scientific research and national defense. In recent years, the share of computer network technology in electronic information engineering has been increasing. This paper first analyzes the computer network technology and electronic information engineering, and then summarizes the application of computer network technology in electronic information engineering.

Computer network technology; Electronic information engineering; App application

With the rapid development of computer network technology, computer network has gradually become an important part of people's daily life and work, and people's work and lifestyle have also been changed by computer network technology. Electronic information engineering is a comprehensive information transmission and use technology integrating computer network technology and computer software technology, which plays a decisive role in promoting economic development. But at present, the development effect and maturity of electronic information engineering in China are not enough, and there are still many problems to be improved.

1 Introduction to Computer Network Technology and Electronic Information Engineering

Computer network technology mainly refers to the digital technology combining computer technology and communication. It must follow the network protocol and transmit and interact information between scattered or independent computers according to certain requirements. In computer network technology, information transmission is mainly realized through network connection, but the transmission needs related media, such as network cable, twisted pair, microwave, cable, optical fiber and so on. Through the author's experience analysis, computer network technology has a strong software and hardware sharing function. In the process of using resources, only by using network technology can data be collected, sorted, processed, transmitted and shared. Therefore, electronic information engineering has the function of video, text and picture transmission. Computer network technology is very common in people's lives, even everywhere. In addition, the information transmission of computer network technology is safer, more accurate, more efficient and safer than the traditional information transmission method. Electronic information engineering mainly includes data collection, processing and storage, and the application of electronic equipment information software system. That is, the process of mobile phones and computers on the phone, short messages and the Internet belongs to the category of electronic information engineering. From the current application technology, electronic information engineering has been widely used in daily work and life, and has a huge impact. At the same time, electronic information engineering can bring convenience to people's lives, improve people's quality of life and reduce people's workload. Notebooks, tablets, collectibles and other devices used in people's daily life all have corresponding electronic information engineering technologies, including information technology, communication technology and computer network technology.

2 computer network technology in the application of electronic information engineering

2. 1 information transmission in electronic information engineering

In the current electronic information engineering, because people have basically entered the information electronic era, the amount of information people receive every day has been significantly improved compared with the past, and people also need this information. Under such circumstances, the efficient and massive information transmission function of electronic information engineering is also the basis for the good application of computer network technology. Using computer network technology to transmit information can ensure the security of information. In the process of information transmission, computer network technology plays an irreplaceable role in electronic information engineering. With the continuous improvement and innovation of electronic information engineering and computer network technology, it can promote the good growth of society and make people's life and work faster and more convenient. Therefore, it is very important and necessary to introduce computer network technology into electronic information engineering.

2.2 electronic information engineering security issues

In addition to its advantages, electronic information engineering still has some defects. Computer network technology has always been a hidden danger of network information threat, which is also applicable to electronic information engineering. In the security protection technology of computer network technology, encryption technology is one of the most effective methods to protect computer information from being cut, which can ensure the overall security efficiency of computer network. In the computer network security protection system, key management program is used to encrypt most files and important system programs in the computer to protect them from being used by remote users. At present, there are two main encryption methods, one is the form of access address and the other is the form of password. In this regard, users can choose the best encryption method according to their own actual situation, thus improving the security protection effect of computer network technology. While improving the security of computer network technology, it can also effectively improve the information transmission security of electronic information engineering.

2.3 Application Technology in Electronic Information Engineering

The practical application of computer network technology in electronic information engineering can be understood as wide area network technology. WAN can connect different network providers, different cities and different devices. From the analysis of current network technology, the number of users of WAN is still in a steady growth trend. In this environment, the requirements for network communication transmission are also constantly improving, such as the transmission capacity of optical cables and cables. The current reference of computer network technology shows that the fast information transmission function of optical fiber medium can effectively resist most signal interference, and has the advantages of very high information transmission quality, no noise and long transmission distance. In this regard, the main transmission mode of WAN is generally optical cable. In addition, satellite communication also has unique advantages, mainly through ground transceiver stations and satellites to achieve signal transmission. This technology can be effectively applied to places where optical cables cannot be laid or the laying distance is too long. The main form of satellite communication is the mobile phone used in daily life, such as mobile phone signal.

2.4 Research and Development of Electronic Information Engineering Device

Electronic information engineering is inseparable from computer network technology, whether it is resource sharing between devices or research and development of new devices. Computer network technology can greatly affect global economic integration, networking and electronic information socialization. In this regard, the relevant staff should fully understand electronic information technology, and be proficient in digital information technology, network technology implementation mechanism, simulation mechanism and so on. For example, in practical application, relevant staff should make clear the difference between public lines and professional lines, and special lines must be protected and encrypted accordingly. At present, derivative systems and UNIX systems are widely used in electronic information engineering systems, but such network systems have no unified protocol standard and unified structure, which will make the transmission of encrypted information between computer network technologies complicated and difficult to realize. Therefore, the relevant staff must use computer network technology to effectively alleviate this problem.

3 Conclusion

To sum up, in the current society, the transmission of information mainly adopts wireless digital communication. Electronic information engineering based on computer network technology can truly show the progress effect of computer network technology in the process of perfection and growth. This paper mainly expounds electronic information engineering and computer network technology, and emphatically analyzes the application of computer network technology in electronic information engineering. The author believes that with the continuous progress of computer network technology, its electronic information engineering will continue to reform and develop, and at the same time, electronic information engineering will provide new impetus for network technology in the opposite direction.

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