《计算机专业英语》第13章在线测试

《计算机专业英语》第13章在线测试剩余时间：59:53答题须知：1、本卷满分20分。2、答完题后，请一定要单击下面的“交卷”按钮交卷，否则无法记录本试卷的成绩。3、在交卷之前，不要刷新本网页，否则你的答题结果将会被清空。第一题、单项选择题（每题1分，5道题共5分）1、Confidentialityofthemessageisnotenoughinasecurecommunication;＿＿＿＿＿＿＿＿isalsoneeded.Thereceiverneedstobesureofthesender’sidentity.A、encryptionB、authorizationC、authenticationD、encapsulation2、Thedata,whentheyarenotencrypted,arecalled＿＿＿＿＿＿＿＿.A、plaintextB、ciphertextC、hypertextD、context3、Avirusisa＿＿＿＿＿＿＿＿＿.A、beastB、computerC、badmanD、program4、Manyvirusesgoresidentinthememorylikea().A、.exefileB、.comfileC、tsrprogramD、datafile5、Now,about()differentvirusesaccountforallthevirusesthatactuallyspreadinthewild.A、30B、150C、1800D、3000第二题、多项选择题（每题2分，5道题共10分）1、Virusesallhavetwophasestotheireｘecution,the()andthe().A、infectionphaseB、del＿etephaseC、attackphaseD、creaｔephase2、()maybeacertaincausethatsomevirusesinfectupon.A、adayB、atimeC、anexternaleventonyourPCD、acounterwithinthevirus3、Manyvirusesdoharmfulthingssuchas().A、deletingfilesB、simulatingtyposC、slowingyourPCdownD、changingrandomdataonyourdisk4、Ifavirussimplyreproduceandhavenocauseforanattackphase,butitwillstill()withoutyourpermission.A、stealingstorageB、pilferCPUcyclesC、del＿etefilesD、playmusic5、Someviruses,withnoattackphase,oftendamagetheprogramsordiskstheyinfectbecausethey().A、havebugsinthemB、containpoorqualitycodeC、stealstorageD、showmessagesonyourscreen第三题、判断题（每题1分，5道题共5分）1、Computersecurityisabranchoftechnologyknownasinformationsecurityasappliedtocomputers.正确错误2、Michelangeloisafilesector.正确错误3、Computervirusisremotefromus.正确错误4、Computervirusmayaffecttheyourphisicalhealth.正确错误5、Theauthorthinksthatunderstandinghowanattackerapproachesyourcomputersystemcanhelpyouprotectit正确错误交卷