Exam:H31-311 _ V2.5
Title:
HCIA-TransmissionV2.5
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1.FASistheframealignmentoverhead,thelengthis6bytes,locatedinthefirstrow,column1~6,the first~3bytesare3OA1bytes,andeachOA1isalways"11110110",thatis,16F6inhexadecimal;the4th to6thbytesare3OA2bytes,andeachOA2isalways"00101000",thatis,28inhexadecimal. ATrue BFalse
Answer:A
2TheLDGsupportselectricallayerschedulingattheODU1level
ATrue BFalse
Answer:B
3Thenumberofnetworkelements(includingREG)inthetwo-fiberbidirectionalmultiplexsectionsharing protectionringcanexceed16. ATrue
B.False
Answer:A
4InEthernet,theframelengthhasalowerlimit,whichismainlyduetowhichofthefollowing considerations
ACarriersense
BMulti-pointaccess
CConflictdetection
DImprovenetworkbandwidthutilization
Answer:C
5WhenthePMsegmentoftheODUkgeneratesseriouslyerroredseconds,thenetworkmanagement willreporttheODUkPMESalarm
A.True BFalse
Answer:B
6.Ifanetworkportthatsupportsauto-negotiationisconnectedtoanetworkportthatdoesnotsupport auto-negotiation,half-duplextofull-duplexmayoccur
A.True BFalse
Answer:A
7Whichofthefollowingoptionsareinthelow-lossareaofsingle-modefiber?(Multiplechoice)
A1310nm
B900nm
C1550nm
D1200nm
Answer:AC
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8Whatarethefollowingstepsforlow-speedservicestobemultiplexedintohigh-speedSDHservices? (multiplechoice)
AMapping
BOverheadInsertion
CPositioning
DMultiplexing
Answer:ACD
9OSN3500branchlinebusinesshasstrongupanddowncapabilities,with16branchlineoutletslots, 5042M,32E4,117E3/DS3,132STM-1e,providingSTM-1/4/16/64grouprate
A.True
BFalse
Answer:A
10.Thelevelsofforcedswitching,fibercutswitching,manualswitching,andpracticeswitchingare arrangedfromhightolow
A.True BFalse
Answer:A
11Physicalport:alsoknownasMACport,istheexternalportoftheboard
ATrue
BFalse
Answer:A
12WhichofthefollowingisnotincludedinthebasicarchitectureofMPLSL2VPN
AAC
B.VC
CTunnel
D.S-VLAN
Answer:D
13IfabiterrorisdetectedintheB1byte,whichofthefollowingalarmswillbereportedbythepeerend
A.MS-AIS
BRS-BBE
CRS-FEBBE
DNotreporting
Answer:D
14FortheOSN6800device,whichofthefollowingslotsdoesnothaveanelectricallayercrossover backplanebus?
ASlot1
BSIot9
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C.SIot10
DSIot17
Answer:D
15ComplextrafficclassificationreferstoclassifyingpacketsaccordingtotheToS(TypeofService)field ofIPpackets,userpriorityorEXPfieldofMPLSpacketstoidentifytrafficwithdifferentpriority characteristics
ATrue BFalse
Answer:B
16.Thecommunicationnetworkcanbedividedintolocalareanetworkandwideareanetworkaccording tothegeographicalscopeitcovers,andametropolitanareanetworkbetweenthelocalareanetworkand thewideareanetwork.Thewideareanetworkischaracterizedbylowdelay,highdatarateandreliable transmission
A.True BFalse
Answer:B
17TheadvantagesofWDMmainlyincludethefollowing(multiplechoice)
ALargecapacity,"transparent"transmissionofdata
BThesystemiseasytoupgrade,andtheexistinginvestmentcanbeprotectedtothegreatestextent whenupgrading
CCanfullyreplaceSDHequipment
DCompatiblewithfutureall-opticalswitchingnetworks
EHighnetworkingflexibility,economyandreliability
Answer:ABDE
18.Thedispersioncoefficientisthedelaydifferencecausedbytheopticalwavelengthsignalpassing throughtheunitlengthofopticalfiberintheunitwavelengthinterval,sowhichofthefollowingistheunit ofthedispersioncoefficient?()
Aps/nm
B.ps/km
Cps/nmkm
D.ps/km.nm
Answer:C
19WheninsertingLCKtotheODUksignalatthelocalend,whatprocessingwillthedownstreamstation systemnotperform?
AReportODUkPMLCKalarm
BDownloadODUkAISinformation
CReturnODUkPMBDI
DInsertODUkPMLCKalarm
Answer:D
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20Pointeradjustmentisrelatedtowhichofthefollowing
A.Theclock BSpeed
CExpenses
DScrambling
Answer:A
21Whichofthefollowingstatementsaboutreuseiscorrect?
Intheprocessofbyteinterleavedmultiplexing,theinformationpayloadandpointerbytesofeachframe areinterleavedandmultiplexedaccordingtotheoriginalvalue,andthesegmentoverheadisalso multiplexedaccordingly.
ATherewillbe4timestheoverheadinSTM-1inSTM-4
B.TheoverheadinSTM4isnewlyintegratedandhasonlyonesetofoverhead
CTheamountofoverheadinSTM-4isthesameasinSTM-1
D.OverheadrandomgenerationinSTM-4
Answer:B
22TheU2000clientsupportsinstallationonWindows,SolarisandSUSELinuxoperatingsystems ATrue BFalse
Answer:B
23TheopticalmonitoringchannelissetupforthemonitoringoftheWDMopticaltransmissionsystem ITU-Trecommendsthatthewavelengthof1510nmispreferred,andthecapacityis2MHz/s
ATrue BFalse
Answer:B
24Thehalf-duplexmodemusthaveacollisiondetectionandavoidancemechanismtoavoidthe situationwheremultipledevicesseizethelineatthesametime.Thismechanismistheso-called CSMA/CD,andtheChinesenameiscarriersensemultipleaccess/collisiondetection
A.True BFalse
Answer:A
25Thecurrentsparsewavelengthdivisionmultiplexingsystemgenerallyworksinthebandfrom1271nm to1611nmWhichofthefollowingisthechannelspacing?
A10nm B5nm C20nm D18nm
Answer:C
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26.ComparedwithtraditionalSDHandSONETequipment,whichofthefollowingadvantagesdoesOTN have?(multiplechoice)
A.MeetthetransmissionbandwidthrequirementsofeachopticalTb/sthroughthewavelengthdivision function
BProvide27Gb/s,107Gb/s,43Gb/sandeven1118Gb/shigh-speedinterface
CProvideupto5levelsofnestedoverlappingTCMconnectionmonitoring
DSupportvirtualconcatenationtransmissionmodetoimproveandoptimizethenetworkstructure
EProvidepowerfulout-of-bandFECfunction,whicheffectivelyguaranteesthelinetransmission performance
Answer:ABDE
27.Themosteffectivesubnetmaskforapoint-to-pointWANlinkis255.255.255.252.
ATrue
B.False
Answer:A
28OSN7500supportsamaximumof2MserviceboardsWhichofthefollowingiscorrect
A.1
B2
C3
D4
Answer:D
29Whichofthefollowingalarmsisnotaswitchingconditionforatwo-fiberbidirectionalmultiplexsection protectionring?
ARLOS BMSAIS
CTUAIS
D.B2EXC
Answer:C
30WhichofthefollowingarethemainfunctionsoftheU2000networkmanagement?(multiplechoice)
A.Topologymanagement
BPerformancemanagement
C.Troubleshooting
DEnd-to-endbusinessmanagement
Answer:ABD
31BothQinQandMPLScanprovideuserswithL2VPNservices,butQinQischeaperandeasierthan MPLS
ATrue
BFalse
Answer:A
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32.WhichofthefollowingdescriptionsofMPLSisincorrect.(multiplechoice)
AMPLS:Multi-protocolLabelSwitching,anon-standardizedroutingandswitchingtechnologyplatform
B.P/PE:P(Provider)istheinternalnodeoftheMPLSnetwork,andPE(ProviderEdge)istheedgeofthe MPLSnetwork
CTheoperationofPE->PisEgress,addingMPLSlabelstoclientsignals
DTheoperationofP->PisIngress,whichexchangesMPLSlabels
Answer:ACD
33WhichofthefollowingisthedatabaseusedbyU2000onPC/WIN2003?
ASybase
BMicrosoftSQLServer2000
C.Foxpro
DDB2
Answer:B
34.Whichofthefollowingiscorrectforopticalamplifiersandregenerators?(multiplechoice)
AHigherregeneratorcost
B.Whentheregeneratorworksataspecificbitrateandaspecificframeformat
CWheretheamplifiercanworkatanybitrateandframeformat
DOpticalamplifiersarerarelyused,andregeneratorsarecommonlyused
Answer:ABC