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北美作业代写:Computer virus

2018-09-14 来源: 51due教员组 类别: Essay范文

下面为大家整理一篇优秀的essay代写范文- Computer virus,供大家参考学习,这篇论文讨论了计算机病毒。计算机病毒最初的目的是为了测试计算机安全,但随着科技的不断进步,计算机病毒已不再是当初简单的恶作剧程序,而成为了一种攻击网络的强有力工具,对网络造成很大的安全威胁。计算机病毒一旦在计算机上运行,就极有可能造成系统崩溃,继而导致计算机系统瘫痪。

Computer virus,计算机病毒,essay代写,作业代写,代写

Computer viruses were written and released by American fridkoen on November 10, 1983, to test computer security. Now, more than 20 years later, there are more than 60,000 types of computer viruses in the world. These viruses are everywhere and everywhere like ghosts, posing a great threat to the information security of computers. For example, when the "shock wave" virus entered the world nine years ago, if there was a flaw in the computer system, it would be automatically searched by the "shock wave" virus, and the computer would be guided to download the virus files through the network. If users of these computers do not install patches, they are more likely to be infected with the virus when connected to the Internet, and the entire infection process does not require any human manipulation. The virus causes the "security subsystem" process to crash, causing the system to reboot repeatedly and causing serious errors in the running of security-related programs.

Now, the computer virus is also evolving with the progress of science and technology. It has become a powerful tool to attack the network instead of a simple prank program. It poses a great security threat to the network. Tens of thousands of new viruses are being created. Viruses can now cause unimaginable disasters to individuals or businesses by automatically searching for vulnerabilities in Web sites, chat tools, email systems, and corporate networks.

Computer viruses, like other normal process, is an executable program, but only run on a computer, a computer virus is destructive, and its attached to other legal procedures, is not a complete program, so it has a right to all other procedures, and legal procedures for the control system of power. That is to say, the control of computer CPU is the key issue. Once a computer virus runs on it, it is highly likely to cause a system crash, which in turn can cause a computer system crash.

Computer viruses are as infectious as biological viruses. Computer viruses can spread from infected computers to uninfected ones through various channels such as E-mail and chat. Once a computer is infected with the virus and is not processed in a timely manner, the virus can infect a large number of executable files in the computer by rapidly replicating. These infected files can act as a new medium to continue to infect new, uninfected devices while they exchange data with other devices. A well-crafted computer virus program has excellent latency. Some well - crafted viruses can only be detected by a professional test program. During concealment it can be quietly transmitted to other systems without being detected. Its infectivity is strong and weak and its harmfulness is closely related to its hiding time in the computer. Most of the time when a computer is infected with a virus, it can run normally, without the user feeling abnormal. Most viruses are designed to be very short code to be better hidden. Viruses typically have only a few hundred B's or 1KB, and PC access to DOS files can be more than a few hundred KB per second, so the virus instantly attaches those few hundred bytes to normal programs, making it hard to detect. Because of this invisibility, computer viruses can infect any computer without being detected by the user. A virus invasion into a computer is bound to pose a threat to system resources, especially computer viruses spread through the network, which can paralyze the whole system in a very short period of time, thus causing great losses. Therefore, it is more necessary to protect against virus invasion than to eliminate virus invasion.

Do well the following protection measures to prevent the virus invasion has a certain role.

Keep an eye on the door. Many viruses are often hidden in the pirated disks, which may lead to virus invasion in the process of copying the data with the disks containing viruses. Therefore, anti-virus software must be used to scan the viruses when using the disks, and the "entrance" of the computers should be closed.

The process that USES computer at ordinary times, want to develop a good habit, accomplish to use antivirus software to check and kill a virus regularly, install the firewall of authentic edition and antivirus software, upgrade to newest version in time. This is a good defense against viruses lurking in computers.

Carefully log into an unknown website. The browser security level will be raised, do not open the unknown email or the unknown website.

Keep the operating system separate, and keep important data, files, etc. in partitions outside the system, and make backups so that they can be recovered in time after being infected by the virus.

Have some basic knowledge of computer viruses so that when a computer is infected with a virus, it will not become infected. Protect the virus from our computers.

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