网络存储复习.docx
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网络存储复习.docx
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网络存储复习
1.WhichlocalreplicationtechnologydoesEMCTimeFinder/Mirrorimplement?
A.CopyonFirstAccess
B.CopyonFirstwrite
C.FullVolumeMirroring
D.Pointerbased
Answer:
C
2.Whichlogicalcomponentofastorageenvironmentishostresident?
A.Memory
B.Port
C.Disk
D.FileSystem
Answer:
D
3.Acustomerrequiresalocalreplicaofadatabasethatmustremainavailableona24*7basis.Theapplicationconsistentreplicaofthefilesystem,whichoperationshouldbeperformed?
A.Stoptheapplicationpriortothecreationofthereplica
B.Quiesceandflushthefilesystembuffersbeforethecreationthereplica
C.Unmountthefilesystempriortothecreationofthereplica
D.Quiesceandflushthefilesystembuffersafterthecreationofthereplica
Answer:
B
4.Whatisanadvantageofreportingonstoragearrays?
A.Planningforstoragegroup
B.Monitoringnumberofarrays
C.Planningforcapacity
D.MonitoringnumberofdisksinaRAIDgroup
Answer:
C
5.Whatisthesequenceofstepsinabusinesscontinuityplanningprocess?
1.Performriskanalysis
2.Collectdataonvariousbusinessprocesses
3.Test,trainandmaintain
4.Developadisasterrecoveryplan
A.3-4-1-2
B.2-3-1-4
C.2-1-4-3
D.3-2-1-4
Answer:
C
6.WhatdoesapulloperationinSANbasedremotereplicationindicate?
A.Dataispulledtooneremotearrayfromanotherremotearray
B.Dataispulledtothecontrolarrayfromremotearray
C.Dataispulledtoonecontrolarrayfromanothercontrolarray
D.Dataispulledtotheremotearrayfromcontrolarray
Answer:
B
7.Acustomerwantstodeploybusinesscontinuitysolutionbetweentodatacenterwhichare500KmapartWhichsolutionwanttoconnectivitybetweenthetwoFC-SANsinthemostcost-effectiveway?
A.IPswitchescommunicatingoverTCP
B.FCswitchescommunicatingoverFCP
C.NativeiSCSIcommunicatingoverTCP/IP
D.FCIPgatewayscommunicatingoverTCP/IP
Answer:
D
8.Infullvolumemirroringwhenisthetargetaccessible?
A.Onlyaftersynchronizationanddetachedfromsource
B.Onlybeforeinitialsynchronizationanddetachedfromsource
C.Onlybeforeinitialsynchronizationandattachedtosource
D.Onlyaftersynchronizationandattachedtosource
Answer:
A
9.Howmanydevicescanbeconnectedtoastoragearrayinapoint-to-pointconfiguration?
A.2
B.Dependsuponnumberofarrayports
C.15milliondevices
D.127
Answer:
A
10.Howmanydomainidsarereservedinfibrechanneladdressspace?
A.16
B.239
C.256
D.17
Answer:
B
11.Whatisafeatureofpointer-basedvirtualreplication?
A.Sourceneednotbehealthyforrestore
B.Reductioninstoragerequirementforthereplicas
C.Replicacannotholdmorethan30%ofthechangeddata
D.Sourcecannotholdmorethan30%ofthechangeddata
Answer:
B(P87)
12.Howdoesasynchronousremotereplicationimproveapplicationperformancecomparedtosynchronousremotereplications?
A.Readsareservicedbytheremotereplica
B.Readsareservicedbythesource
C.Writesareacknowledgedimmediatelybytheremotereplica
D.Writesareacknowledgedimmediatelybythesource
Answer:
D
13.WhichdescribesafeatureofinternalDAS?
A.Localstorageprovisioning
B.HighCPUutilization
C.Highscalability
D.Arraybasedmanagement
Answer:
B
14.Inanintelligentdisksystem,whatistheroleoftheback-end?
A.Tomovedatabetweenahostandthearraycache
B.TocommunicatebetweenTagRAManddatastore
C.Tocommunicatebetweenahostandthestoragesystem
D.Tomovedatabetweenanarraycacheandthedisks
Answer:
D
15.WhichRAIDtypeismostsuitableforanapplicationwithlargesequentialreads?
A.RAID5
B.RAID3
C.RAID1
D.RAID0
Answer:
B(P18)
16.Whichthreesubjectareastakentogetherdefinestoragesecurity?
A.Accesscontrol,informationsecurity,andnetworking
B.Accesscontrol,encryption,andnetworking
C.Encryption,networking,andstorage
D.Informationsecurity,networking,andstorage
Answer:
D
17.Abusinesswantstobackup1TBofdatacontaining100,000filesandanother1TBofdatacontaining1millionfiles.Whichwriteneedmoretime?
A.Numberoffilesisirrelevant
B.Bothwilltakesametime
C.1millionfiles
D.100,000files
Answer:
D
18.Whatarefivecoreelementsofadatacenterinfrastructure?
A.Applications,Databases,Servers/OperatingSystem,SAN,andJBOD
B.Applications,Databases,JBOD,Networks,andStorageArrays
C.Applications,Databases,Servers/OperatingSystem,DAN,andNAS
D.Applications,Databases,Servers/OperatingSystem,Networks,andStorageArrays
Answer:
D
19.Whatisacharacteristicofparity-basedRAID?
A.Parityisupdatedeachtimewhenbothreadandwriteareperformed
B.Parityisreadeachtimeareadisperformed
C.Parityisupdatedeachtimeawriteisperformed
D.Parityisupdatedonlywhenwritesfillastripe
Answer:
C
20.Whatisthedataaccesspatternthatismostaffectbyslowseektimes?
A.Random,smallwrites
B.Sequential,smallreads
C.Random,largereads
D.Sequential,largewrites
Answer:
A
21.Whichtermreferstothewritingofphysicaladdressinformationtoadisk?
A.Striping
B.Partitioning
C.Filesystemmounting
D.Formatting
Answer:
D
22.AcustomercomplainsaboutfrequenttrafficdisruptionstotheirSAN.Afteranalysis,itwasfoundthattheR&Dgroupwascreatedaapplicationtrafficwhiletestingnewproducts.Whatwouldyousuggestthatthiscustomerimplement?
A.ServerVirtualization
B.VirtualSAN
C.Storagevirtualization
D.VirtualLAN
Answer:
B
23.WhichstatementistrueaboutC-Clip?
A.Avirtualpackagethatcontainsmete-dataandBLOB
B.AvirtualpackagethatcontainsCDFandBLOB
C.AvirtualpackagethatcontainsCAandBLOB
D.AvirtualpackagethatcontainsC-ClipIDandBLOB
Answer:
A
24.Howcantheexposuretolossofuncommittedcacheddatabeminimized?
A.Write-back
B.Watermarking
C.Write-through
D.Cachebypassing
Answer:
C
25.WhichbusinesscontinuancesolutionwillenabletheminimumRTO?
A.Usingtaperestoreatahotsite
B.Clusteredproductionservers
C.Usingadatavaulttoahostsite
D.Usingperiodicreplicationatahotsite
Answer:
B
26.Anapplicationusesten9GBDevices.Apointerbasedreplicaoftheapplicationisrequiredevery4hours.Eachreplicawillbekeptfor24hours.Thedatachangesby10%every4hours.Howmanyreplicadevicesarerequired?
A.90
B.60
C.120
D.6
Answer:
B
27.WhatdoesSANsecurityarchitecturerecommend?
A.Multipleintegratedlayersofsecurity
B.Singleintegratedsolutionforsecurity
C.Multipleisolatedlayersofsecurity
D.Multipleisolatedsolutionsforsecurity
Answer:
D
28.WhichNASsolutionistheeasiesttodeployinanexistingEMCSANenvironment?
A.BridgedNASwithiSCSItechnology
B.GatewayNASsystemsolution
C.IntegratedNASsystemwithiSCSItechnology
D.IntegratedNASsystemsolution
Answer:
B
29.Inthediagram,whichzone(s)representhardzone?
A.Zone2
B.Zone1and3
C.Zone3
D.Zone1
Answer:
A
30.WhatisonereasonacompanymightchoosetodeployNAS?
A.Forarraymanageddatasecurity
B.Forhostmanagedstoragevolumes
C.Toobtaincontentaddressedstorage
D.Tosupportaheterogeneousoperationenvironment
Answer:
D
31.WhatmonitoringcharacteristicperyoutoassesstheriskoffailureofFCSwitchportsbeforetheportsactuallyfail?
A.Performance
B.Accessbility
C.Capacity
D.Security
Answer:
B
32.ConsideradiskI/OsysteminwhichanI/Orequestarrivesatarateof100IOPSandtheservicetimeis4ms.Whatistheutilization?
A.80%
B.4%
C.10%
D.40%
Answer:
DU=a×RS
33.AcustomerwithaSANenvironmentisprimarilyconcernedaboutcablingflexibility.Forthiscustomer,whichzoningmethodshouldbeused?
A.Mixedzoning
B.Portzoning
C.Hardzoning
D.WWNzoning
Answer:
D
34.Anapplicationusesten20GBDevices.Apointerbasedreplicaoftheapplicationisrequired.Thereplicawillbekeptfor24hours.Thedatachangesby20%every24hours.Howmuchstorageshouldbeallocatedforthe
A.40GB
B.200GB
C.20GB
D.4GB
Answer:
A
35.InthecontextofprotectingtheFCstorageinfrastructure,whatisanexampleofinfrastructureintegrity?
A.Preventingnodelogintothefabricwithoutproperauthorization
B.ImplementingiSNSdiscoverydomains
C.Notpermittingphysicalaccesstothenodes
D.ImprovingtheFSPFalgorithmtodeterminetoisolatednodes
Answer:
A
36.Whatattributeotherthanindividualidentityorgroupmembershipcanbeusedtorestrictaccessinthecontextofinformationsecurity?
A.Hostnetworkaddress
B.HBAWorldWideName
C.Role
D.Sharedpasswords
Answer:
C
37.WhatistherequirementfornativeiSCSIimplementation?
A.HostwithNICandarraywithFCIPport
B.HostwithiSCSIHBAandarraywithFCport
C.HostwithToEcardandarraywithiSCSIport
D.HostwithsoftwareiSCSIinitiatorandarraywithFCIPport
Answer:
C
38.Whatdoesacachedirtypageindicate?
A.Datarequestedbyhostbutnotyetfetched
B.Datareadfromdiskbutnotaccessedbythehost
C.Datathathaschangedbutisnotyetwrittentodisk
D.Datathathaschangedandhasbeenwrittentodisk
Answer:
C
39.WhatisthefailurethatRAIDtechnologyguardsagainst?
A.Switchfailure
B.Diskfailure
C.HostBusadapterfailures
D.Hostfailures
Answer:
B
40.WhichserviceisusedbyiSCSIinitiatortodiscovertargets?
A.Internetstoragenameservice
B.Storageinternetnamesevice
C.Domainnameservice
D.Networkinformationservice
Answer:
A
41.WhatisthefunctionofFC-1layerintheFibreChannelprotocol?
A.Interfacemapping
B.Routingandflowcontrol
C.Transmissionofrawbits
D.Encodinganddecoding
Answe
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