首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、They don’t damage computer systems. B、They need to attach themselves to other files. C、They could spread on their own through
A、They don’t damage computer systems. B、They need to attach themselves to other files. C、They could spread on their own through
admin
2012-05-28
71
问题
What is the difference between a computer virus and a computer worm? Both can infect and damage computer systems. However, computer viruses and computer worms differ in the way they reproduce and spread. A virus, which is short for "vital information resources under siege", is a program or code that secretly enters a computer by piggybacking on e-mail messages, files, or programs shared between two different computer systems. Then the virus infects its new host by attaching itself to the files within that computer and deleting or changing them or even overwriting entire programs. Just like a biological virus in the human body, a computer virus replicates itself so that it will continue to be contagious when data is shared with another computer system. In 2000, for example, the famous "Love Bug" virus, which traveled via e-mail messages, destroyed files in computers all over the world. Worms, too, are malicious programs that reproduce and spread. But unlike viruses, they do not need to attach themselves to other files. They are programs that run independently and spread on their own through computer networks. Thus they do not require human intervention to make their way from one computer to another. The famous Internet worm of 1988, for example, copied itself across the Internet, destroying many computer systems as it went. Currently, computer analysts are worried about the Sasser worm, which disabled computers in Britain, South Africa, and Taiwan.
Questions 29 to 31 are based on the passage you have just heard.
29. In what aspect do computer viruses and computer worms differ?
30. What can we learn about the "Love Bug" virus from the passage?
31. Which of the following statements is true about computer worms?
选项
A、They don’t damage computer systems.
B、They need to attach themselves to other files.
C、They could spread on their own through computer networks.
D、They replicate themselves when data is shared with another computer system.
答案
C
解析
选项中的They,attach…to…files,spread on their own,replicate themselves等表明,本题可能与某种病毒的分裂及传播方式有关。短文中提到,电脑蠕虫同样是可以复制和传播的恶意程序,但是不像电脑病毒,它们不需要依附在其他文件上,它们是独立运作的程序并且依靠它们自身在电脑网络里进行传播(spread on their own through computer networks),由此可知,答案为[C]。
转载请注明原文地址:https://kaotiyun.com/show/TuE7777K
0
大学英语六级
相关试题推荐
Fromthebeginning,America,anationofimmigrants,welcomedpeopledesiringfreedomandanewstart.However,thecomingtoget
Scientistshavecomeupwithatheoryforwhytimeflieswhenyouarehavingfunanddragswhenyouarebored.Scanshaves
A、Growing,yetuncertain.B、Expandingandsecure.C、Contracting,yetstable.D、Promising,yetshrinking.A对于与网络相关的职业的稳定性,男士是这样认为
A、Studyforthenexttestwiththewoman.B、Takeamakeupexam.C、Rewritehisanswertooneofthequestions.D、Reviewhisanswe
Inthepasthundredyearsamillionpeoplehavediedinearthquakes,anothermillionhavebeenkilledby【B1】______andtornadoes
WhenGarrettstayedathome,shewaspreventedfromexpectingtoreturntoscienceby______.Accordingtothepassage,RuthRo
Thedocument’s________wordingmakesitverydifficulttofollow.
Please______receiptofthisdocumentbysigningandreturningtheenclosedform.
A、Hemighthelpthewomanmuch.B、Thewomanshouldn’tbuyausedcar.C、Hedoesn’tknowalotaboutnewcars.D、Thewomanisab
A、Theywereinterestedandexpressedtheirthoughtsviae-mail.B、Theywillinglysubscribedtoherpodcast.C、Theyfeltsurprise
随机试题
FamilySociologyA)Thestructureofthefamilyandtheneedsthatthefamilyfulfillsvaryfromsocietytosociety.Thenu
对于“最密切联系原则”,正确的说法有()
鲁迅小说《风波》的线索是( )
下列物质中属于含氮类激素的是
深圳证券账户T日开立,()日即可用于交易。
十周岁以上十八周岁以下的未成年人根据《民法通则》对自然人的分类标准应属于()。
()有时即使存在利益矛盾,冲突也不会发生。
从19世纪60年代到90年代,洋务派举办的洋务事业主要有()
将一枚硬币重复掷n次,以X和Y分别表示正面向上和反面向上的次数,则X和Y的相关系数等于
二层以太网交换机联网范围主要受制于______。
最新回复
(
0
)