诺西文档资料开发工程师笔试题文档格式.docx
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4.PPPoE:
5.DSLAM:
6.CDMA:
7.ATM:
8.RADIUS:
9.POTS:
10.P-CSCF:
PartⅡThereisonlyonecorrectanswerforeachquestion,pleasemarktherightonewith“√”(10p,1point/question.
11.Therangeof0Hzto4kHzisreservedforanalogvoicetraffic.ADSLoccupiesfrequenciesabovethatrange.WhatistheupperboundaryforcurrentADSLimplementations?
A.3kHz
B.4kHz
C.1.1MHz
D.40kHz
12.WhichlayeroftheOSIreferencemodelisresponsibleforensuringreliableend-to-enddeliveryofdata?
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.Data-Link
13.
FourLANswitchesareconnectedtogetherasshowninthefigurebelow:
Studythefigurecarefully.WhatisthepurposeoftheSpanningTreeProtocol(STPthatisoperatingintheswitchtopology?
A.Toelectaparticularswitchasbackupdesignatedswitch.
B.TopreventframesfromloopingandhaveoneactiveLayer2paththroughtheswitchesnetwork.
C.Toselectthebestpathtoaremotedestinationthatisonadifferentnetwork.
D.TolearntheMACaddressesofhostattachedtotheswitchesnetwork.
E.TodistributeVLANconfigurationinformationthroughouttheswitchednetwork.
14.Whatprotocolisusedtofindthehardwareaddressofalocaldevice?
A.RARP
B.ARP
C.IP
D.ICMP
E.BootP
15.YouwanttoimplementamechanismthatautomatestheIPconfiguration,includingIPaddress,subnetmask,defaultgateway,andDNSinformation.Whichprotocolwillyouusetoaccomplishthis?
A.SMTP
B.SNMP
C.DHCP
D.ARP
16.WhichclassofIPaddressprovidesamaximumofonly254hostaddressespernetworkID?
A.ClassA
B.ClassB
C.ClassC
D.ClassD
E.ClassE
17.IfyouuseeitherTelnetorFTP,whichisthehighestlayeryouareusingtotransmitdata?
18.TheDoDmodel(alsocalledtheTCP/IPstackhasfourlayers.WhichlayeroftheDoDmodelisequivalenttotheNetworklayeroftheOSImodel?
B.Host-to-Host
C.Internet
D.NetworkAccess
19.
Thefollowingillustrationshowsadatastructureheader.Whatprotocolisthisheaderfrom?
A.IP
B.ICMP
C.TCP
D.UDP
E.ARP
F.RARP
20.PATallowswhichofthefollowing?
A.One-to-oneIPaddresstranslationthroughtheCPErouter
B.Many-to-oneIPaddresstranslationthroughtheCPErouter
C.Application-specificportnumberstobemanuallyconfiguredfortranslation
D.StaticIPaddresstranslations
PartⅢThereareatleasttwocorrectanswersforeachquestion,pleasemarktherightanswerswith“√”(20p,2point/question.
21.Whatarethedecimalandhexadecimalequivalentsofthebinarynumber10011101?
(Choosetwo.
A.159
B.157
C.185
D.0x9D
E.0xD9
F.0x159
22.WhichofthefollowingdescribetheDHCPDiscovermessage?
A.ItusesFF:
FF:
FFasalayer2broadcast.
B.ItusesUDPastheTransportlayerprotocol.
C.ItusesTCPastheTransportlayerprotocol.
D.Itdoesnotusealayer2destinationaddress.
23.WhichstatementsaretrueregardingICMPpackets?
A.TheyacknowledgereceiptofaTCPsegment.
B.Theyguaranteedatagramdelivery.
C.Theycanprovidehostswithinformationaboutnetworkproblems.
D.TheyareencapsulatedwithinIPdatagrams.
E.TheyareencapsulatedwithinUDPdatagrams.
24.WhichofthefollowingareTCP/IPprotocolsusedattheApplicationlayeroftheOSImodel?
(Choosethree.
B.TCP
C.Telnet
D.FTP
E.TFTP
25.WhichofthefollowingareprivateIPaddresses?
A.12.0.0.1
B.168.172.19.39
C.172.20.14.36
D.172.33.194.30
E.192.168.24.43
F.10.141.0.2
26.WhichofthefollowingarereasonswhyWFQmightdiscardapacketinsteadofputtingitintothecorrectqueue?
A.Thehold-queuelimitforallcombinedWFQqueueshasbeenexceeded.
B.ThequeuelengthfortheflowhaspassedtheWREDminimumdropthreshold.
C.TheWFQqueuelengthforthequeuewherethenewlyarrivedpacketshouldbeplacedhasexceededtheCDT.
D.ECNfeedbackhasbeensignaled,requestingthattheTCPsenderslowdown.
27.WhichofthefollowingsarenotfunctionsoftheLANEmulationClient(LEC?
A.Control
B.Dataforwarding
C.Addressresolution
D.ELANassignment
28.Whichofthefollowingprotocolscanprovideauthenticationservices?
A.PIX
B.Logging
C.RADIUS
D.TACACS+
E.Firewallfeatureset
29.InOSPF,wherecanaroutergettherouterIDfrom?
A.LoopbackIPaddress
B.LowestIPaddressofanactiveinterfacewhenOSPFstart