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编号为0、1、2、3、…、15的16个处理器，用单级互联网络互联。当互连函数为Cube3(四维立方体单级互联函数)时，6号处理器与 (42) 号处理器相连接。若采用互连函数Shuffle(全混洗单级互...
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编号为01237的8个处理器当采用PM2+1单级网络互连时与6号处理器相连的处理器号是______
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编号为012315的16个处理器用单级互联网络互联 若采用互连函数Shuffle全混洗单级互
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16个处理器编号为0~15采用PM2+3单级网络互连与13号处理器相连的处理器号是
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编号为01237的8个处理器当采用PM2+1单级网络互连时与6号处理器相连的处理器号是______
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编号为012315的16个处理器用单级互联网络互联当互连函数为Cube34维立方体单级互联函数
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编号为012315的16个处理器采用单级互联网络联接当互联函数为Cube3时11号处理器连接到1号处
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编号为01237的8个处理器当采用PM2+1单级网络互连时与6号处理器相连的处理器号是______
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编号为012315的16个处理器用单级互联网络互联 当互连函数为Cube34维立方体单级互联
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编号为012315的16个处理器用cube0互联函数时第7号处理机可以与第______号处理机相联
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16个处理器编号为0~15用单级互连网络互连互连函数为ShuffleShuffle则第12号处理器将
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编号为012315的16个处理器用单级互联网络互联当互联函数为Cube34维立方体单级互联函数时6号
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编号为011315的16个处理器采用单级互联网络连接当互联函数为Cube3时11号处理器连接到10号
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计算机可以按照指令流和数据流来分为四类传统的顺序处理的计算机属于59类其余三类都是计算机体系结构中发
多级互联网络、交叉开关结构、总线结构
交叉开关结构、多级互联网络、总线结构
总线结构、交叉开关结构、多级互联网络
多级互联网络、总线结构、交叉开关结构
编号为011315的16个处理器采用单级互联网络连接当互联函数为Cube3时11号处理器连接到10号
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编号为012315的16个处理器用单级互联网络互联当互连函数为Cube34维立方体单级互联函数
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编号为012315的16个处理器用单级互联网络互联当互联函数为Cube34维立方体单级互联函数时6号
15
14
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计算机可以按照指令流和数据流来分为四类传统的顺序处理的计算机属于59类其余三类都是计算机体系结构中发
多级互联网络、交叉开关结构、总线结构
交叉开关结构、多级互联网络、总线结构
总线结构、交叉开关结构、多级互联网络
总线结构、多级互联网络、交叉开关结构
编号为012315的16个处理器采用单级互联网络联接当互联函数为Cube3时11号处理器连接到1号处
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16个处理器编号为0115采用单级Cube3互连网络互连与13号处理器相联的处理器号是
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某公司为便于员工在家里访问公司的一些数据允许员工通过Internet访问公司的FTP服务器如图2-2所示为了能够方便地实现这一目标决定在客户机与FTP服务器之间采用1协议在传输层对数据进行加密该协议是一个保证计算机通信安全的协议客户机与服务器之间协商相互认可的密码发生在2[*]
astuteserviceprovidersrealizethatthecontinuedsupportoflegacyX.25andasynchronousnetworkelementusingseparateoperationsnetworkiscost141.Forexamplethemaintenanceofmultiplenetworkscanrequireadditionalstaff.Oftenthisstaffmustbetrainedonmultiplevendortechnologiessometimesrequiringparallelgroupsspecializingineach142.Henceadditionalmaintenanceproceduresmustbemaintainedandadministrativerecordsare143.Theduplicationoftransportfacilitiestocarry144networktrafficisaninefficientuseofresources.Andnotsurprisinglymoretechnologiesinstalledinacentralofficemeansthenecessityformorephysicalspaceandanincreaseinpowerconnectionsandpowerconsumptionmigrationofthese145networkelementstoIP-basedDCnsisalogicalstrategy.
WLANsareincreasinglypopularbecausetheyenablecost-effectiveconnectionsamongpeopleapplicationsanddatathatwerenotpossibleornotcost-effectiveinthepast.ForexampleWLAN-basedapplicationscanenablefine-grainedmanagementofsupplyanddistribution166toimprovetheirefficientyandreduce167.WLANscanalsoenableentirelynewbusinessprocesses.TocitebutoneexamplehospitalsareusingWLAN-enabledpoint-of-careapplicationstoreduceerrorsandimproveoverall168care.WLANmanagementsolutionsprovideavarietyofotherbenefitsthatcanbesubstantialbutdifficulttomeasure.Forexampletheycanprotectcorporatedatabypreventing169throughrogueaccesspoints.TheyhelpcontrolsalarycostsbyallowingITstaffstomanagelargernetworkswithoutaddingstaff.Andtheycanimproveoverallnetworkmananementbyintegratingwithcustomers’existingsystemssuchasOpenViewandUniCenter.Fortunatelyitisn’tnecessarytomeasurethesebenefitstojustifyinvestinginWLANmanagementsolutionswhichcanquicklypayforthemselvessimplybyminimizingtime-consuming170andadministrativechores.
WLANsareincreasinglypopularbecausetheyenablecost-effectiveconnectionsamongpeopleapplicationsanddatathatwerenotpossibleornotcost-effectiveinthepast.ForexampleWLAN-basedapplicationscanenablefine-grainedmanagementofsupplyanddistribution166toimprovetheirefficientyandreduce167.WLANscanalsoenableentirelynewbusinessprocesses.TocitebutoneexamplehospitalsareusingWLAN-enabledpoint-of-careapplicationstoreduceerrorsandimproveoverall168care.WLANmanagementsolutionsprovideavarietyofotherbenefitsthatcanbesubstantialbutdifficulttomeasure.Forexampletheycanprotectcorporatedatabypreventing169throughrogueaccesspoints.TheyhelpcontrolsalarycostsbyallowingITstaffstomanagelargernetworkswithoutaddingstaff.Andtheycanimproveoverallnetworkmananementbyintegratingwithcustomers’existingsystemssuchasOpenViewandUniCenter.Fortunatelyitisn’tnecessarytomeasurethesebenefitstojustifyinvestinginWLANmanagementsolutionswhichcanquicklypayforthemselvessimplybyminimizingtime-consuming170andadministrativechores.
Whenthesystemuponwhichatransportentityisrunningfailsandsubsequentlyrestartsthe136informationofallactiveconnectionsislost.Theaffectedconnectionsbecomehalf-openasthesidethatdidnotfaildoesnotyetrealizetheproblem.Thestillactivesideofahalf-openconnectionscanclosetheconnectionusinga137timer.Thistimermeasuresthetimethetransportmachinewillcontinuetoawaitan138ofatransmittedsegmentafterthesegmenthasbeenretransmittedthemaximumnumberoftimes.Whenthetimer139thetransportentityassumesthateithertheothertransportentityortheinterveningnetworkhasfailed.AsaresultthetimerclosestheconnectionandsignalsanabnormalclosetotheTSuser.Intheeventthatatransportentityfailsandquicklyrestartshalf-openconnectionscanbeterminatedmorequicklybytheuseoftheRSTsegmentthefailedsidereturnsanRSTitoeverysegmentithatitreceiveswhentheRSTireachestheothersideitmustbecheckedforvaliditybasedonthe140numberiastheRSTcouldbeinresponsetoanoldsegmentiftheresetisvalidthetransportentityperformsanabnormaltermination.
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation.
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation.
SOXisanalternative156forXML.ItisusefulforreadingandcreatingXMLcontentina157editor.ItistheneasilytransformedintoproperXML.SOXwascreatedbecausedeveloperscanspendagreatdealoftimewithrawXML.FormanyofusthepopularXML158havenotreachedapointwheretheirtreeviewstablesandformscancompletelysubstitutefortheunderlying159language.ThisisnotsurprisingwhenoneconsidersthatdevelopersstilluseatextviewalbeitenhancedforeditingotherlanguagessuchasJava.SOXuses160torepresentthestructureofanXMLdocumentwhicheliminatestheneedforclosingtagsandanumberofquotingdevices.Theresultissurprisinglyclear.
Whenthesystemuponwhichatransportentityisrunningfailsandsubsequentlyrestartsthe136informationofallactiveconnectionsislost.Theaffectedconnectionsbecomehalf-openasthesidethatdidnotfaildoesnotyetrealizetheproblem.Thestillactivesideofahalf-openconnectionscanclosetheconnectionusinga137timer.Thistimermeasuresthetimethetransportmachinewillcontinuetoawaitan138ofatransmittedsegmentafterthesegmenthasbeenretransmittedthemaximumnumberoftimes.Whenthetimer139thetransportentityassumesthateithertheothertransportentityortheinterveningnetworkhasfailed.AsaresultthetimerclosestheconnectionandsignalsanabnormalclosetotheTSuser.Intheeventthatatransportentityfailsandquicklyrestartshalf-openconnectionscanbeterminatedmorequicklybytheuseoftheRSTsegmentthefailedsidereturnsanRSTitoeverysegmentithatitreceiveswhentheRSTireachestheothersideitmustbecheckedforvaliditybasedonthe140numberiastheRSTcouldbeinresponsetoanoldsegmentiftheresetisvalidthetransportentityperformsanabnormaltermination.
Microsoft’sCOMisasoftware146thatallowsapplicationstobebuiltfrombinarysoftwarecomponents.COMistheunderlyingarchitecturethatformsthefoundationforhigher-levelsoftwareserviceslikethoseprovidedbyOLE.COMdefinesabinarystandardforfunctioncallingbetweencomponentsawayforcomponentstodynamicallydiscovertheinterfacesimplementedbyothercomponentsandamechanismtoidentifycomponentsandtheirinterfacesuniquely.OLEisacompound147standarddevelopedbyMicrosoft.OLEmakesitpossibletocreate148withoneapplicationandlinkorembedtheminasecondapplication.Embeddedobjectsretaintheiroriginalformatand149totheapplicationthatcreatedthem.SupportforOLEisbuiltintotheWindowsandMacOSOperatingSystems.A150compounddocumentstandarddevelopedmainlybyAppleandIBMiscalledOpenDoc.
astuteserviceprovidersrealizethatthecontinuedsupportoflegacyX.25andasynchronousnetworkelementusingseparateoperationsnetworkiscost141.Forexamplethemaintenanceofmultiplenetworkscanrequireadditionalstaff.Oftenthisstaffmustbetrainedonmultiplevendortechnologiessometimesrequiringparallelgroupsspecializingineach142.Henceadditionalmaintenanceproceduresmustbemaintainedandadministrativerecordsare143.Theduplicationoftransportfacilitiestocarry144networktrafficisaninefficientuseofresources.Andnotsurprisinglymoretechnologiesinstalledinacentralofficemeansthenecessityformorephysicalspaceandanincreaseinpowerconnectionsandpowerconsumptionmigrationofthese145networkelementstoIP-basedDCnsisalogicalstrategy.
VRMLisa151for3DmultimediaandsharedvirtualworldsontheWWW.IncomparisontoHTMLVRMLaddsthenextlevelofinteractionstructuredgraphicsandextra152zandtimetothepresentationofdocuments.TheapplicationsofVRMLare153rangingfromsimplebusinessgraphicstoentertainingWWWpagegraphicsmanufacturingscientificentertainmentandeducationalapplicationsand3Dsharedvirtualworldsandcommunities.X3DisthenameunderwhichthedevelopmentofVRMLiscontinued.X3DisbasedonXMLandisbackwards154withVRML.FurthermoreitiscomponentizedprofiledandextensiblewhichmakesitpossibletouseX3Dinverydifferent155fromhigh-endvisualizationstolightweightapplications.
astuteserviceprovidersrealizethatthecontinuedsupportoflegacyX.25andasynchronousnetworkelementusingseparateoperationsnetworkiscost141.Forexamplethemaintenanceofmultiplenetworkscanrequireadditionalstaff.Oftenthisstaffmustbetrainedonmultiplevendortechnologiessometimesrequiringparallelgroupsspecializingineach142.Henceadditionalmaintenanceproceduresmustbemaintainedandadministrativerecordsare143.Theduplicationoftransportfacilitiestocarry144networktrafficisaninefficientuseofresources.Andnotsurprisinglymoretechnologiesinstalledinacentralofficemeansthenecessityformorephysicalspaceandanincreaseinpowerconnectionsandpowerconsumptionmigrationofthese145networkelementstoIP-basedDCnsisalogicalstrategy.
以下关于RSA加密算法的说法中错误的是______
为了保障数据的存储和传输安全需要对一些重要数据进行加密由于对称密码算法11所以特别适合对大量的数据进行加密国际数据加密算法IDEA的密钥长度是12位
用于在网络应用层和传输层之间提供加密方案的协议是______
许多黑客利用缓冲区溢出漏洞进行攻击对于这一威胁最可靠的解决方案是______
Tocompeteintoday’sfast-pacedcompetitiveenvironmentorganizationsareincreasinglyallowingcontractorspartnersvisitorsandgueststoaccesstheirinternalenterprisenetworks.Theseusersmayconnecttothenetworkthroughwiredportsinconferenceroomsorofficesorviawirelessaccesspoints.InallowingthisopenaccessforthirdpartiesLANsbecome171.Thirdpartiescanintroduceriskinavarietyofwaysfromconnectingwithaninfectedlaptoptounauthorizedaccessofnetworkresourcesto172activity.Formanyorganizationshowevertheoperationalcomplexityandcoststoensuresafethirdpartynetworkaccesshavebeenprohibitive.Fifty-twopercentofsurveyedCISOsstatethattheycurrentlyuseamoatandcastle’ssecurityapproachandadmitthatdefensesinsidetheperimeterareweak.Threatsfrominternalusersarealsoincreasinglyacauseforsecurityconcerns.Employeeswithmaliciousintentcanlaunch173ofserviceattacksorsteal174informationbysnoopingthenetwork.Astheyaccessthecorporatenetworkmobileandremoteusersinadvertentlycaninfectthenetworkwith175andwormsacquiredfromunprotectedpublicnetworks.Hackersmasqueradingasinternaluserscantakeadvantageofweakinternalsecuritytogainaccesstoconfidentialinformation.
VRMLisa151for3DmultimediaandsharedvirtualworldsontheWWW.IncomparisontoHTMLVRMLaddsthenextlevelofinteractionstructuredgraphicsandextra152zandtimetothepresentationofdocuments.TheapplicationsofVRMLare153rangingfromsimplebusinessgraphicstoentertainingWWWpagegraphicsmanufacturingscientificentertainmentandeducationalapplicationsand3Dsharedvirtualworldsandcommunities.X3DisthenameunderwhichthedevelopmentofVRMLiscontinued.X3DisbasedonXMLandisbackwards154withVRML.FurthermoreitiscomponentizedprofiledandextensiblewhichmakesitpossibletouseX3Dinverydifferent155fromhigh-endvisualizationstolightweightapplications.
由L2TPv2构建的VPN网络中主要由LAC和LNS两种网络设备构成以下说法错误的是______
网络安全设计是保证网络安全运行的基础网络安全设计有其基本的设计原则以下关于网络安全设计原则的描述错误的是______
Withhundredsofmillionsofelectronic161takingplacedailybusinessesandorganizationshaveastrongincentivetoprotectthe162ofthedataexchangedinthismannerandtopositivelyensurethe163ofthoseinvolvedinthetransactions.Thishasledtoanindustry-widequestforbettermoresecuremethodsforcontrollingIToperationsandfordeployingstrongsecuritymechanismsdeeplyandbroadlythroughoutnetworkedinfrastructuresandclientdevices.Oneofthemoresuccessfulconceptstoengagetheimaginationsofthesecuritycommunityhasbeenthedevelopmentofstandards-basedsecurity164thatcanbeincorporatedinthehardwaredesignofclientcomputers.Theprincipleofencapsulatingcoresecuritycapabilitiesin165andintegratingsecurityprovisionsatthedeepestlevelsofthemachineoperationhassignificantbenefitsforbothusersandthoseresponsibleforsecuringIToperations.
3DES在DES的基础上使用两个56位的密钥K1和K2发送方用K1加密K2解密再用K1加密接受方用K1解密K2加密再用K1解密这相当于使用______倍于DES的密钥长度的加密效果
Microsoft’sCOMisasoftware146thatallowsapplicationstobebuiltfrombinarysoftwarecomponents.COMistheunderlyingarchitecturethatformsthefoundationforhigher-levelsoftwareserviceslikethoseprovidedbyOLE.COMdefinesabinarystandardforfunctioncallingbetweencomponentsawayforcomponentstodynamicallydiscovertheinterfacesimplementedbyothercomponentsandamechanismtoidentifycomponentsandtheirinterfacesuniquely.OLEisacompound147standarddevelopedbyMicrosoft.OLEmakesitpossibletocreate148withoneapplicationandlinkorembedtheminasecondapplication.Embeddedobjectsretaintheiroriginalformatand149totheapplicationthatcreatedthem.SupportforOLEisbuiltintotheWindowsandMacOSOperatingSystems.A150compounddocumentstandarddevelopedmainlybyAppleandIBMiscalledOpenDoc.
图2-6示意了发送者利用非对称加密算法向接收者传送消息的过程图中a和b处分别是______[*]
SOXisanalternative156forXML.ItisusefulforreadingandcreatingXMLcontentina157editor.ItistheneasilytransformedintoproperXML.SOXwascreatedbecausedeveloperscanspendagreatdealoftimewithrawXML.FormanyofusthepopularXML158havenotreachedapointwheretheirtreeviewstablesandformscancompletelysubstitutefortheunderlying159language.ThisisnotsurprisingwhenoneconsidersthatdevelopersstilluseatextviewalbeitenhancedforeditingotherlanguagessuchasJava.SOXuses160torepresentthestructureofanXMLdocumentwhicheliminatestheneedforclosingtagsandanumberofquotingdevices.Theresultissurprisinglyclear.
IPSec提供了在局域网广域网和互联网中安全通信的能力以下关于IPSec说法错误的是______
Withhundredsofmillionsofelectronic161takingplacedailybusinessesandorganizationshaveastrongincentivetoprotectthe162ofthedataexchangedinthismannerandtopositivelyensurethe163ofthoseinvolvedinthetransactions.Thishasledtoanindustry-widequestforbettermoresecuremethodsforcontrollingIToperationsandfordeployingstrongsecuritymechanismsdeeplyandbroadlythroughoutnetworkedinfrastructuresandclientdevices.Oneofthemoresuccessfulconceptstoengagetheimaginationsofthesecuritycommunityhasbeenthedevelopmentofstandards-basedsecurity164thatcanbeincorporatedinthehardwaredesignofclientcomputers.Theprincipleofencapsulatingcoresecuritycapabilitiesin165andintegratingsecurityprovisionsatthedeepestlevelsofthemachineoperationhassignificantbenefitsforbothusersandthoseresponsibleforsecuringIToperations.
Withhundredsofmillionsofelectronic161takingplacedailybusinessesandorganizationshaveastrongincentivetoprotectthe162ofthedataexchangedinthismannerandtopositivelyensurethe163ofthoseinvolvedinthetransactions.Thishasledtoanindustry-widequestforbettermoresecuremethodsforcontrollingIToperationsandfordeployingstrongsecuritymechanismsdeeplyandbroadlythroughoutnetworkedinfrastructuresandclientdevices.Oneofthemoresuccessfulconceptstoengagetheimaginationsofthesecuritycommunityhasbeenthedevelopmentofstandards-basedsecurity164thatcanbeincorporatedinthehardwaredesignofclientcomputers.Theprincipleofencapsulatingcoresecuritycapabilitiesin165andintegratingsecurityprovisionsatthedeepestlevelsofthemachineoperationhassignificantbenefitsforbothusersandthoseresponsibleforsecuringIToperations.
VRMLisa151for3DmultimediaandsharedvirtualworldsontheWWW.IncomparisontoHTMLVRMLaddsthenextlevelofinteractionstructuredgraphicsandextra152zandtimetothepresentationofdocuments.TheapplicationsofVRMLare153rangingfromsimplebusinessgraphicstoentertainingWWWpagegraphicsmanufacturingscientificentertainmentandeducationalapplicationsand3Dsharedvirtualworldsandcommunities.X3DisthenameunderwhichthedevelopmentofVRMLiscontinued.X3DisbasedonXMLandisbackwards154withVRML.FurthermoreitiscomponentizedprofiledandextensiblewhichmakesitpossibletouseX3Dinverydifferent155fromhigh-endvisualizationstolightweightapplications.
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