计算机专业英文文献.doc

Computer network virus and precautions With the new network technology and application of the continuous rapid development of the computer network should Use of becoming increasingly widespread, the role played by the increasingly important computer networks and human More inseparable from the lives of the communitys reliance on them will keep growing. With With the continuous development of computer technology, the virus has become increasingly complex and senior, the new generation of Computer viruses make full use of certain commonly used operating systems and application software for protection of the weak low Spots have rampant in recent years as the popularity of the Internet in the world, will be attached document containing the virus The situation in the mail has been increasing spread of the virus through the Internet, making the spread of the virus speed Sharp also increased, by an ever-increasing scope of the infection. Therefore, the protection of the security of computer networks will be Will become increasingly important. A computer virus The definition of computer virus computer virus (Computer Virus) in the peoples republic of China The computer information system security protection regulations which has been clearly defined, the virus refers to the preparation or Computer program inserted in the damage or destruction of computer data functions, affecting computer use Self-replication and can a group of computer instructions, or code. Second, network virus With the development of network and the Internet, a wider spread, the greater New harm The virus emerged This is the Internet virus. The virus is an emerging concept in the traditional The virus was not classified network virus this concept, because the development of networks, the traditional virus The network also has a number of characteristics. Todays Internet virus is a broad notion of a As as long as it is carried out using the Internet to spread destruction can be known as network viruses, such as: Love the back door, Panda burning incense. Third, network virus and the distinction between computer virus The original common computer virus is nothing more than the devastating formatted hard drive, delete system With the users documents, databases, etc. destruction. The mode of transmission is through nothing but also by virus infection Mutual copy of the software, carrying the virus, such as the use of pirated optical discs, such as infection disk systems The pilot virus and infected executable file virus, in addition to a network virus These are the common characteristics of the virus, but also steal users with remote data, remote control of the other side Computers and other damaged properties, such as Trojan and consumption of funding the operation of the network computer Source collapse of the network server worm. Fourth, the network against virus Network destructive virus, will directly affect the work of the network, ranging from lowering speed video Ring for the efficiency of the network, while in the collapse, undermining the server information to a multi-year work destroyed Dan. Because viruses and other network annually fraud led to economic losses of over 16 billion yuan, But this figure is constantly rising year by year. The next few years, the size of the market will reach Security 60 billion yuan. One antivirus software experts pointed out: Network avian flu virus even more. Such as: Xiong Cat burning incense In addition to virus infection through the web site users, the latest virus also through QQ Loopholes in propagating itself through file-sharing networks, the default sharing, weak password systems, U disk and windows Forms bottom of the top mobile hard drives, and other means of communication. While LAN once a computer machine For infection, it can spread through the entire network instant, or even within a very short period of time can be infected Thousands of computers, can lead to serious networks. Symptoms of poisoning in the performance of computers There are enforceable. Exe files have become a strange pattern, the pattern shown as Panda Burning incense, and then System blue screen, restart the frequent, hard drive data destruction, serious entire company All computer LAN will all poisoning. Panda burning incense, only more than half a month, a few varieties have high Of more than 50, and the number of its users infected constantly expanding. Makes infected, Panda burn incense disease The personal drug users has been as high as several million people infected with a few more corporate users is rising exponentially. Network More on the computer network the greater the harm caused by the virus. V. network transmission of the virus Features 1. Infection fast: single machine environment, the virus can only be passed from one computer diskette To another, and in the network can be adopted by the rapid spread of network communication mechanism. According to measurement Set against a typical PC network use in normal circumstances, once a computer workstation sick Drugs, and will be online within 10 minutes in the several hundreds of all infected computers. 2. Proliferation of a wide range: in the network due to the spread of the virus very quickly and spread to encompass a large area, not only the rapid transmission of all LAN computer, but also through remote workstations virus in一瞬 Inter spread to thousands of miles away. 3. Dissemination in the form of complex and varied: computer viruses in general through the network Station server workstation channels of communication, but in the form of complex and diverse communication. 4. Difficult to completely wipe: the standalone computer virus carriers sometimes can be deleted documents Or low-level formatted drives, and other measures to eliminate the virus completely, and the network once a computer work Clean stations failed to disinfect the entire network can be re-infected by the virus, or even just completed removal The work of a workstation is likely to be on-line by another workstation virus infection. Therefore, Only workstations in addition to killing viruses, and can not solve the virus harm to the network is. 6, the type of network virus As the network increasingly developed, the type of network virus has been increasing, generally summed up as The following categories: 1. Worm It is the use of the transmission mechanism of replication and dissemination network, the mode of transmission is through the network And e-mail, the prefix is Worm. For example, in recent years the great harm Nimda virus is Demodex A worm virus. The virus used Microsofts Windows operating system, computer flu With this virus, will continue to automatically dial-up Internet access and use information in the document or the address Sharing network spreads, and ultimately undermine the most important user data. 2. Macro Virus Hong virus is a Storage in the document or template in the Acer computer virus. The prefix Macro, once open such documents, which Acer will be implemented, then the virus would Acer Been enabled transferred to the computer, and in the presence of the Normal template. From then on, all since The document will be kept moving infection that the Hong virus, and if other users opened the flu Documents with the virus, the Hong virus will be transferred to his computer. 3. Destructive procedures virus The prefix destructive virus program is: Harm. The characteristics of this virus is a good in itself Look at the user clicks on icons to temptation, when the user clicks on the virus, the virus will direct users Computer generated destruction. If C formatted disk (Harm.formatC.f), the killer orders (Harm. Command.Killer). 4. System virus The prefix system for the virus: Win32, PE, Win95, W32, W95, and so on. These viruses The characteristics of the general public can be infected with the windows operating system *. exe and *. dll file, And through these documents for dissemination. If the CIH virus. 5. Backdoor virus Backdoor virus prefix is Backdoor. The total of such virus through network - Sowing, opened the back door to the system to the user and potential safety problems. 6. Bundling machine virus Bundled-virus prefix is: Binder. The characteristics of this virus is the virus writers will use Specific procedures will be bundled with a number of applications such as QQ, IE bundled up on the surface It is normal to see the paper, when users run these bundled virus, will run these applications on the surface Procedures, and then tied to the operation of hidden virus, which caused harm to the user. Such as: baled Tied QQ (Binder.QQPass.QQBin), the system killer (Binder.killsys). 7. Script virus The virus is usually JavaScript scripting code prepared by the malicious code, prefix is usually Spript, with the general nature of advertising, will modify your IE Home, modify registry, and other information, Computer user inconvenience caused. 8. Planting procedures virus virus This virus is of the public will run from the in vivo release of one or several new Under the virus to the system directory, by the release of a new virus damage. If the glaciers are sowing (Dropper.BingHe2.2C), MSN striker (Dropper.Worm.Smibag). 9. Joke virus The prefix is the virus joke: Joke. Also called prank virus. The characteristics of this virus is itself a nice user clicks on icons to temptation, When the user clicks of this virus, the virus will be made to disrupt the operation scare users, in fact The virus did not destroy any computer user. Such as: ghost (Joke.Girlghost) virus. 10. Trojan h