2023年思科認(rèn)證考試題庫(kù)1帶答案解析

2023年思科認(rèn)證考試題庫(kù)帶答案解析預(yù)?？荚図樌?！第1卷一.綜合考試題庫(kù)(共20題)1.[多選題]AsaEzonexamtraineeyouarerequiredtosetthedefaultgatewayonaCiscoswitchtotheIPaddressof192.168.1.115.WhichIOScommandshouldyouuse?

A.TestKSwitch(config)iproute-default192.168.1.115

B.TestKSwitch(config)ipdefault-gateway192.168.1.115

C.TestKSwitch(config)iproute192.168.1.1150.0.0.0

D.TestKSwitch(config)ipdefault-network192.168.1.115

E.Noneoftheabove

正確答案:ABCD

TestKSwitch(config)iproute-default192.168.1.115TestKSwitch(config)ipdefault-gateway192.168.1.115TestKSwitch(config)iproute192.168.1.1150.0.0.0TestKSwitch(config)ipdefault-network192.168.1.115

解析：解析：Explanation:

2.[單選題]路由器下“特權(quán)用戶模式”的標(biāo)識(shí)符是：()

A.>

B.!

C.

D.(config-if)

正確答案:C

解析：C

3.[單選題]常見(jiàn)的LSA有幾種類型()

A.4

B.5

C.6

D.7

正確答案:C

6

解析：C

4.[單選題]為了阻止交換機(jī)環(huán)路，交換機(jī)上所采用的技術(shù)為（）

A.水平分割

B.生成樹(shù)協(xié)議

C.觸發(fā)更新

D.地址學(xué)習(xí)

正確答案:B

生成樹(shù)協(xié)議

解析：B

5.[單選題]下列關(guān)于路由器和交換機(jī)的描述中，錯(cuò)誤的是（）

A.路由器可以用來(lái)連接internet

B.二層交換機(jī)可以用來(lái)實(shí)現(xiàn)“異地網(wǎng)絡(luò)”互連

C.路由器可以用來(lái)做路徑選擇

D.交換機(jī)可以轉(zhuǎn)發(fā)廣播

正確答案:D

交換機(jī)可以轉(zhuǎn)發(fā)廣播

解析：D

6.[單選題]YouwishtosegmentyourLANintomultiplebroadcastdomains.Whichtechnologymethodshouldyouimplementinordertodothis?

A.Transparentbridging

B.Cut-throughswitching

C.Fragment-freeswitches

D.VirtualLANs

E.Store-and-forwardswitching

F.F.Noneoftheabove

正確答案:D

VirtualLANs

解析：D解析：Explanation:

7.[單選題]AfterconnectingaPCtoanavailableportonaswitch,youfindthatthePCcannotaccessanyoftheresourcesontheLAN.NootherPC'sconnectedtotheswitchappeartobehavinganyissues.Whatisthemostlikelycauseforthisproblem?

A.Therouterlacksaroutingtableentryforthenewhost

B.ThehostswitchportisassignedtotheincorrectVLAN

C.ThehostMACaddressisincorrectlyconfigured

D.ASTPinstanceforthenewhosthasnotbeeninitialized

E.TheswitchdoesnothavetheMACaddresshardcodedintheCAMtable.

正確答案:B

ThehostswitchportisassignedtotheincorrectVLAN

解析：解析：Explanation:VirtualLANsbreakupbroadcastdomainsinalayer-twoswitchedinternetwork.IfahostisinadifferentVLANthenthenetworkservicesitneedstouse,thepacketsmustgothrougharouter.Ifroutingdoesnottakeplace,thePCwillbeunabletocommunicatewithanyotherdevicesnotinthesameVLAN.AnswerBisthebestanswerforthisquestion.IncorrectAnswers:A.ThePCisunabletocommunicatewithotherLANusers.Norouterneedstoevenbeinstalledforthistowork.C,E.TheMACaddressofthePCdoesnotneedtobeenteredmanuallyintotheswitch.TheswitchwilldynamicallylearnoftheMACaddressofthePC.D.TheSTPalgorithmdoesnotneedtohaveanyendhostinformationaddedinorderforittowork.

8.[單選題]IP擴(kuò)展訪問(wèn)列表的數(shù)字標(biāo)示范圍是多少（）。

A.0-99

B.1-99

C.100-199

D.101-200

正確答案:C

100-199

解析：C

9.[單選題]路由器“路由模式”的提示符號(hào)是（）

B.(config)

C.(config-if)

D.(config-router)

正確答案:D

(config-router)

解析：D

10.[單選題]OSI七層模型中，傳輸層的數(shù)據(jù)封裝名稱為（）

A.比特

B.幀

C.包

D.段

正確答案:D

段

解析：D

11.[單選題]哪一個(gè)命令可以設(shè)置路由器特權(quán)用戶的“明文密碼”（）

A.enablepassword

B.password

C.enablesecret

D.secret

正確答案:A

enablepassword

解析：A

12.[單選題]CiscoIOS命令ipnatinsidesourcestatic10.1.1.5172.35.16.5的作用是什么()

A.為所有的外部NAT創(chuàng)建一個(gè)全局的地址池

B.為內(nèi)部的靜態(tài)地址創(chuàng)建動(dòng)態(tài)的地址池

C.它為所有內(nèi)部本地PAT創(chuàng)建創(chuàng)建了動(dòng)態(tài)源地址轉(zhuǎn)換

D.為內(nèi)部本地地址和內(nèi)部全局地址創(chuàng)建一對(duì)一的映射關(guān)系

正確答案:D

為內(nèi)部本地地址和內(nèi)部全局地址創(chuàng)建一對(duì)一的映射關(guān)系

解析：D

13.[單選題]下列對(duì)RIP的配置中，合法的命令是（）

A.routerrip100network10.12.0.0

B.routerrip100network10.0.0.0

C.routerripnetwork10.12.0.0

D.routerrip100network10.0.0.0

正確答案:C

routerripnetwork10.12.0.0

解析：C

14.[單選題]在OSPF的完全存根區(qū)域中，使用以下哪種LSAType報(bào)文或其它方式與區(qū)域間通信：（）

A.LSAType1.2

B.LSAType3

C.LSAType4

D.默認(rèn)路由：0.0.0.0

正確答案:D

默認(rèn)路由：0.0.0.0

解析：D

15.[單選題]HowmanyusableIPaddressescanyougetfromaconventionalClassCaddress?

A.128

B.192

C.254

D.256

E.510

正確答案:C

254

解析：解析：Explanation:

16.[單選題]命令ipnatpoolaaa192.1.1.2192.1.1.10netmask255.255.255.0的作用是()

A.指定可訪問(wèn)地址

B.定義地址池

C.指定路由

D.定義哪些地址可以進(jìn)行地址轉(zhuǎn)換

正確答案:B

定義地址池

解析：B

17.[多選題]Whataretwocharacteristicsof"storeandforward"switching?(Selecttwoanswerchoices)

A.Latencyfluctuatesregardlessofframe.size.

B.Theswitchreceivesthecompleteframe.beforebeginningtoforwardit.

C.Latencythroughtheswitchvarieswithframe.length.

D.Theswitchchecksthedestinationaddressuponreceiptofheaders.

正確答案:BC

Theswitchreceivesthecompleteframe.beforebeginningtoforwardit.Latencythroughtheswitchvarieswithframe.length.

解析：解析：Explanation:

18.[單選題]OSI第二層數(shù)據(jù)封裝完成后的名稱是：()

A.比特

B.包

C.幀

D.段

正確答案:C

幀

解析：C

19.[單選題]擴(kuò)展ACL和標(biāo)準(zhǔn)ACL的區(qū)別（）。

A.標(biāo)準(zhǔn)的ACL在禁止和允許方面比擴(kuò)展的ACL更高的精度

B.擴(kuò)展的ACL核查數(shù)據(jù)包的源地址(sourceaddress)和目標(biāo)地址和端口號(hào)

C.他們都可以查端口號(hào)

D.他們都可以查特殊協(xié)議和其他參數(shù)

正確答案:B

擴(kuò)展的ACL核查數(shù)據(jù)包的源地址和目標(biāo)地址和端口號(hào)

解析：B

20.[單選題]Whichoneofthefollowingcharacteristicsistrueregardingtheuseofhubsandswitches?

A.HubscanhavetheirportsbeconfiguredwithVLANs

B.Usinghubsiscostlywithregardtobandwidthavailability.

C.Switchescannotforwardbroadcasts.

D.Switchesaremoreefficientthanhubsinprocessingframes.

E.Switchesincreasethenumberofcollisiondomainsinthenetwork.

正確答案:E

Switchesincreasethenumberofcollisiondomainsinthenetwork.

解析：解析：Explanation:Switchesincreasesthenumberofcollisionsdomainsinthenetwork.SwitchesthatareconfiguredwithVLANswillreducethesizeofthecollisiondomainsbyincreasingthenumberofcollisiondomainsinanetwork,butmakingthemsmallerthanthatofonebig,flatnetwork.IncorrectAnswers:A.SwitchesarecapableofVLANconfigurations,buthubsarenot.B.Hubsaregenerallytheleastcostlymethodpossibletoconnectmultipledevicestogetherinanetwork.C.Switchesforwardbroadcastsandmulticasts,byd