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CCNA认证考试最新真题.docx

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CCNA认证考试最新真题.docx

CCNA认证考试最新真题

CCNA认证考试最新真题

（1）TCP/IPAddressingandProtocol

1:

YourjuniornetworkadministratorwantstoknowwhatthedefaultsubnetmaskisforaClassCIPaddress.Whatdoyoutellhim?

A.255.0.0.0

B.255.255.0.0

C.255.245.255.0

D.255.255.255.0

E.255.255.255.255

 

2:

Anapplicationneedstohavereliable,end-to-endconnect-ivity.Whichofthefollowingprotocolswillgiveyoureliableconnectivity?

A.TCP

B.UDP

C.IP

D.ICMP

 

3:

Youaredesigninganetwork,whichneedstosupport55users.Youdon'tplantoextendthesegmentbeyondthecurrentnumberofusers.Whichsubnetmaskwouldbestmeetyourneeds?

A.255.255.0.0

B.255.255.255.0

C.255.255.255.192

D.255.255.255.160

 

4:

Youhaveaddedanewswitchtoyournetwork.Youwanttomanageitremotely,soyouneedtoassignitanIPaddress.YourrouterthatconnectstotheswitchhasanIPaddressof172.16.12.33/27.Whichofthefollowingaddressescanyouassigntothisswitch?

A.172.16.12.33/28

B.172.16.12.32/27

C.172.16.12.33/27

D.172.16.12.34/27

E.172.16.12.35/28

F.172.16.12.38/28

G.172.16.12.63/27

 

5:

Theaddress172.16.208.16/20isahostaddressinwhichofthefollowingsubnets?

A.172.16.176.0–255.255.240.0

B.172.16.192.0–255.255.240.0

C.172.16.208.0–255.255.240.0

D.172.16.224.0–255.255.240.0

 

6:

YouaredesigninganIPaddressschemeforyourbrandnewremoteoffice.ThevicepresidentofITcallstotellyouthatyouwillbeinchargeofthe192.168.1.64/26subnetwork.Thissuppliesyouwithasinglesubnetworkwith62hosts.Youneedtohaveatleasttwosubnetswith14hostsineachsubnet.Whatcustomsubnetmaskshouldyouuse?

A.255.255.255.128

B.255.255.255.192

C.255.255.255.224

D.255.255.255.240

E.255.255.255.248

 

7:

Youhavesubnettedthe210.106.14.0networkwitha/24mask.YourbossatAcme,Inc.wantstoknowhowmanyusablesubnetworksandusablehostaddressespersubnetthiswouldprovide.Whatshouldyoutellher?

A.Onenetworkwith254hosts

B.Twonetworkswith128hosts

C.Fournetworkswith64hosts

D.Sixnetworkswith30hosts

 

8:

Identifythreevalidhostaddressesinanysubnetofthe201.168.27.0network,assumingafixedsubnetmaskof255.255.255.240.（Choosethree.）

A.201.168.27.33

B.201.168.27.112

C.201.168.27.119

D.201.168.27.126

E.201.168.27.175

F.201.168.27.208

 

9:

WhatisthesubnetworkaddressforahostwiththeIPaddress201.100.5.68/28?

A.201.100.5.0

B.201.100.5.32

C.201.100.5.64

D.201.100.5.65

E.201.100.5.31

F.201.100.5.1

 

10:

Whichofthefollowingprotocolsusesathree-wayhandshakemechanismtoestablishsessions?

A.TCP

B.IP

C.UDP

D.IPX

E.Framerelay

 

11:

Whichofthefollowingprotocolsisconnection-oriented?

A.TCP

B.IP

C.IPX

D.Framerelay

 

12:

YouareusinganapplicationonyourWindows2000clientmachinesthatprovideserrorcorrection.Youneedaprotocoltoprovidefasttransport.Whichprotocolshouldyourapplicationuse?

A.TCP

B.IP

C.UDP

D.SPX

E.AppleTalk

 

13:

WhenusingTCP,afterasessionisopen,theapplicationscanadjustthenumberofsegmentstheyreceivebeforesendinganacknowledgment.Thisbehaviorisknownas______________.

A.MTUadjustment

B.Windowing

C.FlexibleSendPath

D.FCS

 

14:

Ifthedestinationdidnotreceiveasegment,howwilltheTCPhostknowtoresendtheinformation?

A.TheACKreceivedwillnotincludethesegmentnumberthatwasnotreceived.

B.TheACKreceivedwillincludethesegmentnumberthatwasnotreceived.

C.ThesendinghostwillsendaPACKtoverifysegmentreceipt.

D.ThedestinationhostwillsendaYACKmessagebacktothesendinghost.

 

15:

Youareplanningonusingasinglenetworkthatsupports208users.WhichIPaddressclasswouldyouchoosetobethemostefficient?

A.ClassA

B.ClassB

C.ClassC

D.ClassD

E.ClassE

 

16:

RFC1918definestheprivateIPaddressranges.WhichofthefollowingIPaddressesareconsideredpartoftheseranges?

（Choosethree.）

A.10.23.45.67

B.126.21.34.56

C.172.16.32.1

D.172.31.234.55

E.192.169.4.5

 

17:

Anewnetworkisbeingdesignedforyourcompany,Acme,Inc.IfyouuseaClassCIPnetwork,whichsubnetmaskwillprovideoneusablesubnetperdepartmentwhileallowingenoughusablehostaddressesforeachdepartmentspecifiedinthetable?

Department

 NumberofUsers

 

Corporate

 7

 

CustomerSupport

 15

 

Financial

 13

 

HR

 7

 

Engineering

 16

 

 

A.255.255.255.0

B.255.255.255.192

C.255.255.255.224

D.255.255.255.240

E.255.255.255.248

 

18:

Whichoftheseprotocolsprovidesdatatransport,relyingontheerrorcorrectioncapabilitiesoftheapplicationitself?

A.UDP

B.TCP

C.SNMP

D.ICMP

 

19:

WhichofthefollowingareusedbyTCPtoensurereliabledeliveryofdata?

（Choosetwo.）

A.MACaddressresolution

B.Sequencenumbers

C.Acknowledgments

D.Ping

E.Routingupdates

 

20:

YoudiscoverthatyouareabletoadjustthewindowsizeoftheTCPsegment.Youincreasethewindowsizetotesttheresults.Whatwillyouobservehappeningonyournetwork?

A.Increasedthroughput

B.Decreasedthroughput

C.Increasedlatency

D.Decreasedreliability

21:

Yourorganizationisusingthe192.168.1.0/24addressspace.Youneed28subnets.Whatsubnetmaskwouldyouusetocreatethesesubnets?

A.255.255.255.0

B.255.255.255.128

C.255.255.255.192

D.255.255.255.224

E.255.255.255.240

F.255.255.255.248

 

22:

WhichofthefollowingprotocolsmapsIPaddressestoMACaddressesforconnectivitytooccurbetweentwohosts?

A.ARP

B.RARP

C.SLARP

D.DHCP

 

23:

Yourjuniornetworkadministratorcannotseemtopingahostinanothernetworkandasksyouwhyitisn'tworking.Whichofthefollowingisnotananswerthatyouwouldgivehim?

A.Thehost'sdefaultgatewayisdown.

B.Thedestinationhostisnotpoweredon.

C.TheIPaddressoftherouterinterfaceisincorrect.

D.TheIPaddressoftheswitchtowhichthedestinationhostconnectsisincorrect.

E.Thehostisinadifferentsubnet.

 

24:

WhichofthefollowingclassesofIPaddressesisutilizedformulticasting?

A.ClassA

B.ClassB

C.ClassC

D.ClassD

 

25:

YougiveyourITdepartmentaspreadsheetofIPaddressesandtheirsubnets.Youreceiveacallfromoneofthejuniortechsaskingwhatthe/26meansnexttotheIPaddresses.Youtellher:

A.Itrepresentsthenumberofhostspossibleonthatsubnetwork.

B.Itrepresentsthenumberofsubnetworksthatarebeingused.

C.ItrepresentstheclassofIPaddressbeingused.

D.Itrepresentsthenumberofbitsinthesubnetmaskthatare1.

 

26:

YouaregivenanIPnetworkof192.168.5.0andtoldthatyouneedtoseparatethisnetworkintosubnetworksthatcansupportamaximumof16hostspersubnet.Thiswillhelpalleviatecongestiononthenetwork.Whatsubnetmaskcanyouusetocreatethesubnetsnecessarytomeetthegivencriteria?

A.255.0.0.0

B.255.255.0.0

C.255.255.255.0

D.255.255.255.224

E.255.255.255.240

 

27:

WhichofthefollowingwouldaClassAnetworkbeassignedto?

A.Governmentagency

B.Small-to-mediumsizedcorporation

C.SOHO

D.Anindividual

 

28:

AclienthastheIPaddress192.168.5.98/27.Whichofthefollowingaddressesareonthesamesubnetasthishost?

（Choosetwo.）

A.192.168.5.95

B.192.168.5.100

C.192.168.5.128

D.192.168.5.110

 

29:

WhichofthefollowingIPaddressesisnotapublicIPaddressthatcanberoutedovertheInternet?

A.2.3.4.5

B.11.12.13.14

C.165.23.224.2

D.172.31.45.34

E.203.33.45.22

 

30:

YouaregivenaClassBnetwork.WhatisthedefaultsubnetmaskassignedtotheClassBnetwork?

A.255.255.255.255

B.255.255.0.0

C.255.224.0.0

D.0.0.0.0

 

31:

Youaretroubleshootingyourrouter'sinterfaces.Forsomereason,theEthernetinterfacewillnotaccepttheIPaddressof192.168.5.95/27thatyou'veassigned.Whichofthefollowingexplainstherouter'srefusaltotaketheIPaddress?

A.ClassCaddressescannotbeassignedtoEthernetinterfaces.

B.The/27isaninvalidmask.

C.Itisabroadcastaddress.

D.ItisapublicIPaddress.

E.ItisaprivateIPaddress.

 

32:

YouareanetworktechnicianatAcme,Inc.Youarerequiredtodividethe172.12.0.0networkintosubnets.Eachsubnetmusthavethecapacityof458IPaddresses.Also,accordingtotherequirements,youmustprovidethemaximumnumberofsubnets.Whichsubnetmaskshouldyouuse?

A.255.255.255.254

B.255.255.254.0

C.255.255.240.254

D.255.255.0.0

 

33:

WhatisthesubnetworkandbroadcastIPaddressof192.168.2.37withthesubnetmaskof255.255.255.248?

A.192.168.2.24/192.168.2.31

B.192.168.2.32/192.168.2.39

C.192.168.2.40/192.168.2.47

D.192.168.2.48/192.168.2.55

E.192.168.2.56/192.168.2.63

 

34:

Oneofyourco-workersatAcme,Inc.,needstoconvertthebinarynumber11011010intoadecimal.Whatisthedecimalequivalent?

A.218

B.219

C.220

D.221

E.222

 

35:

Oneofyourco-workersatAcme,Inc.,needstoconvertthebinarynumber01011010intoadecimal.Whatisthedecimalequivalent?

A.75

B.83

C.90

D.97

 

36:

Oneofyourco-workersatAcme,Inc.,needstoconvertthebinarynumber11010110intoadecimal.Whatisthedecimalequivalent?

A.198

B.214

C.252

D.255

 

37:

Oneofyourco-workersatAcme,Inc.,needstoconvertthebinarynumber10110110intoadecimal.Whatisthedecimalequivalent?

A.182

B.192

C.202

D.212

 

38:

YouareconfiguringasubnetfortheAcme,Inc.,branchofficeinBeijing.YouneedtoassignIPaddressestohostsinthissubnet.Youhavebeengiventhesubnetmaskof255.255.255.224.WhichoftheseIPaddresseswouldbevalid?

（Choosethree.）

A.15.234.118.63

B.92.11.178.93

C.134.178.18.56

D.192.168.16.87

E.201.45.116.159

F.217.63.12.192

 

39:

Youareane

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