With the development of information technology, computer information system has gradually become the lifeblood of the whole state institutions and the pillar of social activities. The following is what I arranged for you for your reference.

Fan: Research on Computer Network Security Precautions Abstract Computer network has greatly facilitated people's lives. When we use computers to do all kinds of work for us, we should pay attention to all kinds of threats, viruses and hacker attacks on the computer network, which will paralyze our computers. Now the network environment is mixed, and all kinds of situations can happen. This paper discusses the main threats that computers are facing now and the preventive measures that we can take in the face of threats.

Computer network; Security issues; counter-measure

1 Main threats to computer network security

1. 1 computer virus invasion

Since the computer was developed, it has been threatened by viruses, which can be divided into malicious viruses and non-malicious viruses. Italian virus is considered as malware. It will not only cause a lot of information loss in our computer, but also cause computer paralysis in serious cases. What is even more frightening is that computers infected with malicious viruses are also contagious, and they can easily infect computers connected to them. The economic losses brought by the "panda burning incense" virus to the mainland can reach hundreds of millions of yuan. So malicious viruses do great harm to our computers. Non-malicious viruses do the most harm to the computer, but they will not cause any substantial damage to the computer.

1.2 Internet hacking

Cyber hackers refer to some criminals who use some loopholes in the network to illegally access personal computers and steal personal effective information. Hackers are divided into two types: ① Intentional purpose is mainly to steal other people's information, which will not only cause the loss of users' computer information, but also cause users' computers to be paralyzed, resulting in all information being unusable. (2) Out of curiosity, prying into the privacy and secrets of network users will not cause too much loss to the computer system. What's more, some spies or hackers will attack state-specific computers to obtain state secrets, which will pose a great threat to the country economically, politically and militarily. Therefore, hacker attack is the most destructive threat to computers at present.

1.3IP address is forged.

Nowadays, computer users often encounter the situation that their IP address is occupied and they can't surf the Internet normally when using computers. The so-called IP address counterfeiting means that someone is imitating his own computer for a series of activities. Every computer user has his own specific IP address, which cannot be copied. That is to say, if someone can pretend to be their own IP *** to conduct malicious acts on the Internet, it is very likely that they will be found on our own heads in the end, and great disputes will occur then, which is also one of the threats to computer security.

1.4 Existence of various vulnerabilities

Sometimes the computer housekeeper we installed will remind us that there are loopholes in the computer and hope that we can fix them in time. These vulnerabilities may not have any direct adverse effects on our computers, but they will pave the way for hacker attacks. Hackers can easily attack our computers because they know about vulnerabilities and attack our computers with vulnerabilities as a breakthrough.

2 computer security precautions

2. 1 Application of antivirus software

Most computers will install some software with the function of killing computer viruses, such as computer housekeeper and Kingsoft Internet Security. They can kill common viruses, and some network viruses are hidden deeply, so the general prevention technology is not enough to identify and find them. Therefore, computer users can adopt a multi-level protection system, install some anti-virus software on their computers at the same time, and arrange their functions reasonably to prevent virus invasion. Multi-level protection system greatly protects the computer's security and can make the computer in a safe state.

2.2 Application of network firewall technology

The attacks of network hackers are irregular and may threaten our computers anytime and anywhere. Firewall technology can effectively prevent user information from being obtained by hackers in the network, and prevent hackers from destroying, copying or tampering with user information. The so-called network firewall technology refers to controlling the mutual access between computer networks, effectively preventing external users from accessing the internal network by abnormal means, thus protecting the internal network security. Firewall technology can not only protect hackers' attacks, but also effectively avoid the harm of viruses to a certain extent, so the application of firewall technology can greatly improve the security of computers.

2.3 the use of identity authentication technology

Facing the threat of IP address counterfeiting, identity authentication technology emerged. Identity authentication technology refers to the identity authentication in the computer network world. In the computer world, all information is data, so we can also set ourselves a set of data as our identity representatives. The computer system will take this as the only authentication of the network system. When our identity needs to be verified, we only need to enter our preset number to confirm that we are using the network, thus preventing others from maliciously using our IP address to use the computer network system and improving the security of the computer system.

2.4 Improve safety awareness and standardize management system.

If you want to keep your computer in a relatively safe environment, you must improve your security awareness. When there are loopholes in our computer, we should fix them in time. When downloading software, you should pay attention to whether there are binding software, whether these software are useful to you, and purify your computer network environment. * * * From the perspective of safeguarding people's interests, we should strengthen legal supervision and reasonably regulate and restrict the Internet.

refer to

[1] Cheng Liming. On computer network security precautions [J]. Computer Knowledge and Technology, 20 10/0,246: 31~ 32.

[2] Geng Jinxiu. On computer network security precautions [J]. China Science and Technology Information, 20 1 1, 3 18: 54 ~ 55.

[3] Yang Guang, Li Feifei, Yang Yang. Analysis of computer network security precautions [J]. Science and Technology Information, 20 1 129: 52.

Fan Wener: Cultivating students' innovative ability in computer teaching in higher vocational colleges Abstract: Computer teaching in higher vocational colleges is an educational way to realize students' innovative ability. In computer teaching, we can cultivate students' innovative consciousness and deepen their understanding of information technology. In computer teaching, teachers need to change the traditional teaching concept, inject new vitality into teaching and cultivate innovative talents for the society.

Keywords: higher vocational education; Computer teaching; Innovation capacity

Nowadays, computer teaching has become the top priority of teaching, and the arrival and popularization of information technology has pushed computer teaching to a new height. Computer teaching is needed not only for computer majors, but also for other disciplines. This has become an inseparable part of teaching in higher vocational colleges.

1. Improve the professional quality of computer teachers

Teaching in higher vocational colleges plays an important role in students' learning. If higher vocational colleges want to improve students' innovative thinking ability, they should attach importance to the teaching of computer teachers. Computer teachers in higher vocational colleges can't be satisfied with the existing knowledge level, so they should constantly enrich their knowledge, so as to provide more knowledge resources for students. In addition to teaching students basic professional knowledge, computer teachers should also shoulder the heavy responsibility of cultivating students to carry out quality education, so that students can develop in an all-round way. Computer teachers should not ignore students' innovative thinking in teaching, but should increase students' practical operation opportunities and make them become innovative talents in the new era.

2. Organize computer-related practical activities.

Students have the ability to innovate, which requires accumulation and long-term efforts to form. Computer teaching in higher vocational colleges should create such opportunities for students to cultivate this innovative ability in practice, to learn computer knowledge in practice, to enhance their practical ability, and to integrate practice and innovative consciousness. Higher vocational colleges can organize students to participate in more practical activities, and colleges can also launch some computer-related competitions, so that students can sign up enthusiastically, which will increase students' opportunities to operate computers and increase exchanges and communication among students. Colleges and universities can also let students do more computer-related public welfare activities. This not only makes students get exercise, improves the practical application ability of computer knowledge, but also contributes to social harmony.

3. Change the teaching concept of higher vocational colleges.

Classroom learning is the main place for students to improve their self-ability and enrich their knowledge, and the quality of classroom teaching is also related to students' learning. Therefore, in order to improve students' innovative ability, teachers should pay attention to classroom efficiency. Computer teaching is the main way to cultivate students' innovative ability. Teachers should first have an innovative idea, so that students can learn this idea. Teachers should encourage students to get rid of the traditional thinking mode, open their own thinking, bravely express new ideas and let more people know; Teachers can properly combine multimedia technology to assist teaching and improve teaching effect. In order to improve teaching efficiency, teachers need to mobilize students' learning enthusiasm and make the classroom as lively, interesting and relaxed as possible. This requires teachers to have this kind of thinking first, so as to infect students. Under the influence of teachers, students will be more brave to express their views and conduct in-depth research. Teachers can make PowerPoint to assist teaching, so that they can show what they need to learn and make teaching easier and more convenient. Students can form a visual impact through slides, so that students can better integrate into teaching. Computer teaching can make the teaching in higher vocational colleges more distinctive and stimulate students' learning. There is a certain breakthrough in both knowledge content and teaching methods.

4. Create a diversified classroom

If higher vocational colleges want to cultivate innovative students, first of all, the classroom is the key, and the classroom is the main place for students to learn. Therefore, higher vocational colleges should pay enough attention to the classroom. Teachers can give students some questions when teaching, so that students will be particularly curious and have a certain thirst for knowledge. Teachers can lend the platform to students in class, so that students can express their views and opinions on the platform, thus improving students' innovative ability. In other disciplines, computers can also be applied and organically combined, which not only improves the teaching quality of computer disciplines, but also helps other disciplines and promotes the development of students' brain thinking. In order to improve the computer teaching in higher vocational colleges qualitatively, we should attach importance to the teaching work of computer teachers. Teachers need to find out the teaching mode that students prefer and apply it. As the main body of learning, students should invest enough time and energy in computer learning. Teachers need to give students enough room to play in class, give students enough opportunities to use what they have learned and experience, and give students more opportunities to exercise. Computer teaching evaluation in higher vocational colleges can make computer teachers pay more attention to the cultivation of students' innovative ability in teaching. This is an arduous and long-term task, which requires the unremitting efforts and persistence of computer teachers. Higher vocational colleges also need to make some contributions to provide students with better learning environment and hard facilities.

References:

[1] Mai Shiya. On how to cultivate students' innovative ability in computer teaching in higher vocational colleges [J]. Computer Knowledge and Technology, 20 15, 15.

[2] Zhang Chenliang. Cultivating students' innovative ability in computer teaching in higher vocational colleges [J]. Industry and Technology Forum, 20 12, 15.