交互式操作系统中为了能使多个用户同时与系统进行交互,最关键的问题是()。
A.计算机要有足够快的运行速度
B.能快速进行内外存之间的信息交换
C.系统能够及时接收多个用户的输入
D.一段时间内所有用户的程序都能运行
第1题
A.SDMVoice
B.SDMSignal
C.SDMTrans
D.SDMManage
E.SDMRout
F.SDMBulk
第2题
A.Trafficburstsaresmoothedoutbyqueuingtheexcesstraffictoproduceasteadierflowofdata
B.Excesstrafficisbufferedsothatthetrafficremainswithinthedesiredrate.
C.Packetsthatconformtotrafficpoliciesarenotdelayed.
D.Packetmarkingisavailableandallowsexcesspacketstobere-markedwithalowerpriorit
第3题
A.Queuingintroducesequaldelaysforpacketsofthesameflow,resultinginjitter.
B.Whencongestionoccurs,droppingaffectsmostoftheTCPsessions,whichsimultaneouslybackoffandthenrestartagain.
C.Allbufferscantemporarilybeseizedbyaggressiveflows,andnormalTCPflowsexperiencebufferstarvation.
D.Thereisnodifferentiateddropmechanism.Higherprioritytrafficisdroppedinthesamewayasbest-efforttraffic.
E.InTCPstarvation,trafficexceedsthequeuelimitbecauseoftheburstynatureofpacketnetworks.AroutercannothandlemultipleconcurrentTCPsessions.
F.GlobalsynchronizationoccursbecausemultipleTCPhostsreducetheirtransmissionratesatrandomintervalsinresponsetopacketdropping
第4题
A.IftheclassificationpolicyisbasedupontheToSbyte,theqospre-classify commandisrequiredbecausetheToSbyteonlyappearsintheinnerIPheader.
B.TheToSbyteiscopiedtotheouterheaderbydefault.Therefore,theqospre-classifycommandisnotnecessary.
C.WithGREencapsulation,theqospre-classifycommandisappliedonthetunnelinterface.ThispracticeallowsfordifferentOoSconfigurationsoneachtunnel.
D.WithGREencapsulation,theqospre-classifycommandisappliedonthephysicalinterface.ThispracticeallowsfordifferentOoSconfigurationsoneachinterface.
E.WithIPsecencapsulation,theqospre-classifycommandisappliedonthephysicalinterface.ThispracticeallowsfordifferentOoSconfigurationsoneachinterface.
第5题
A.WPA1isdisabledandWPA2isenabled.
B.WPA1isenabledandWPA2isdisabled.
C.WPA1isenabledandWPA2isenabled.
D.TKIPisthedefaultparameterforWPA1andWPA2.
E.AESisthedefaultparameterforWPA1andWPA2.
F.ThedefaultWPA1andWPA2parametersareenabled
第6题
A.ItcompressestheLayer2payloadandmarksthepacketasahighprioritytobetransmittedfirst
B.ItfragmentslargerpacketsandallowsVoIPpacketstobetransmittedinbetweenthem.
C.Itstopsthetransmissionoflargepacketswhenprioritypacketsarrive.
D.Itsendshighprioritypacketsinbetweennormaltrafficpackets.
第7题
A.TheAutoOoSpolicieswillbeattachedtotheinterface.
B.DataaboutthenetworktrafficwillbecollectedviatheuseofNBAR-basedprotocoldiscovery,andthetrafficonthenetworkwillbeanalyzed.
C.Theclassmapsandpolicymapswillbecreatedandinstalledonthebasisoftheinformationthatiscollectedduringtheautodiscoveryphase
D.TemplateswillbecreatedthatwillbeusedtocreatepolicymapsandclassmapstoconfiguretheOoSfeaturesonthenetwork.
第8题
A.showipnbar
B.showipnbarpdim
C.showipnbarport-map
D.showipnbarprotocol-discovery
第9题
A.P,S,T,U
B.U,T,S,P
C.S,U,P,T
D.P,U,S,T
E.S,P,U,T
F.S,P,T,U
第10题
A.TheWCSsendsnewrougeaccesspointnotifications.
B.TheWCSlocatesandmonitorsrougeaccesspointsuntiltheyareeliminatedoracknowledged.
C.TheWCSreconfigurestherougeaccesspointwithproperauthenticationcredentials.
D.TheWCSsendsdeauthenticateanddisassociatemessagestotherougeaccesspoint.
E.TheWCScontainsrougeaccesspointsbysendingtheirclientsdeauthenticateanddisassociatemessages
F.TheWCSsendsdeauthenticateanddisassociatemessagestoallwirelessclientsonthenetwork.
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