CCNA 2 Chapter 6 V40 AnswersWord格式文档下载.docx
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CCNA 2 Chapter 6 V40 AnswersWord格式文档下载.docx
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3.
Inthenetworkshowninthegraphic,threebitswereborrowedfromthehostportionofaClassCaddress.Howmanyvalidhostaddresseswillbeunusedonthethreepoint-to-pointlinkscombinedifVLSMisnotused?
3
4
12
36
84
180
4.Whichofthefollowingarecontainedintheroutingupdatesofclasslessroutingprotocols?
32-bitaddress
nexthoprouterinterface
subnetmask
unicasthostaddress
Layer2address
5.
Refertotheexhibit.Thenetworkadministratorwantstocreateasubnetforthepoint-to-pointconnectionbetweenthetworouters.Whichsubnetworkmaskwouldprovideenoughaddressesforthepoint-to-pointlinkwiththeleastnumberofwastedaddresses?
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
6.WhatdoesVLSMallowanetworkadministratortodo?
utilizeonesubnetmaskthroughoutanautonomoussystem
utilizemultiplesubnetmasksinthesameIPaddressspace
utilizeIGRPastheroutingprotocolinanentireautonomoussystem
utilizemultipleroutingprotocolswithinanautonomoussystem
7.WhichthreeinteriorroutingprotocolssupportVLSM?
(Choosethree.)
OSPF
RIPv1
RIPv2
EIGRP
BGP
STP
8.WhichofthefollowingproblemsdoesVLSMhelptoalleviate?
theshortageofIPaddresses
thedifficultyofassigningstaticIPaddressestohostsinlargeenterprises
thecomplexityofimplementingadvancedroutingprotocolssuchasOSPFandEIGRP
theshortageofnetworkadministratorsqualifiedintheuseofRIPv1andIGRP
9.
Refertotheexhibit.AnetworktechnicianentersthestaticrouteinR1neededtoreachnetwork10.1.1.0/24.ApingfromtheS0/0/0interfaceonR1tohostBfails.Thetechnicianbeginstestingthenetworkandhasthefollowingresults:
1.pingsfromR1totheS0/0/0interfaceonR2….successful
2.pingsfromR1totheFa0/0interfaceonR2….successful
3.pingsfromhostBtohostsonthe10.1.1.0/24network….successful
4.pingsfromhostBtotheFa0/0interfaceonR2….successful
5.pingsfromR2tohostB….successful.
WhatisthelikelycauseofthefailureofthepingfromR1tohostB?
ThedefaultgatewayonhostBisnotcorrectlyset.
TherearenoroutesbacktonetworksconnectedtoR1fromR2.
ThereisaLayer2problembetweenR2andhostB.
HostBhasadefectiveEthernetcard.
10.AnetworkadministratoristaskedwithdividingupaclassCnetworkamongtheQA,Sales,andAdministrationdepartments.TheQAdepartmentismadeupof10people,theSalesismadeupof28people,andtheAdministrationhas6.WhichtwosubnetsmasksadequatelyaddresstheQAandSalesdepartments?
255.255.255.252forQA
•255.255.255.224forSales
•255.255.255.240forQA
255.255.255.248forQA
255.255.255.0forSales
11.
Refertotheexhibit.AnetworkengineerissummarizingthetwogroupsofroutesonrouterR1shownintheexhibit.Whichsummarizationwillworkforallthesubnets?
192.168.0.0/23
192.168.0.0/22
192.168.0.0/21
192.168.0.0/20
AClassCaddresshasbeenassignedforuseinthenetworkshowninthegraphic.UsingVLSM,whichbitmaskshouldbeusedtoprovideforthenumberofhostaddressesrequiredonRouterA,whilewastingthefewestaddresses?
/31
/30
/29
/28
/27
/26
13.
Refertotheexhibit.Inthenetworkthatisshown,therouterinterfacesareassignedthefirstaddressineachsubnet.WhichIPaddresswouldbeusableforahostononeoftheLANsinthisnetwork?
192.168.1.5/30
192.168.2.17/28
192.168.2.63/27
192.168.2.130/25
14.
Refertotheexhibit.WhatsubnetmaskwillbeappliedifRouterAsendsaRIPv1updateforthenetwork172.16.1.0toRouterB?
none
8
16
24
15.
Refertotheexhibit.Thenumberofrequiredhostaddressesforeachsubnetinanetworkislistedintheexhibit.Thisnumberincludesthehostaddressrequirementsforallrouterportsandhostsonthatsubnet.Afteralldeviceandrouterportaddressassignmentsaredetermined,whatwillbethetotalnumberofunusedhostaddressesavailable?
6
14
29
34
40
62
16.
AnadditionalsubnetisrequiredforanewEthernetlinkbetweenRouter1andRouter2asshowninthediagram.Whichofthefollowingsubnetaddressescanbeconfiguredinthisnetworktoprovideamaximumof14useableaddressesforthislinkwhilewastingthefewestaddresses?
192.1.1.16/26
192.1.1.96/28
192.1.1.160/28
192.1.1.196/27
192.1.1.224/28
192.1.1.240/28
17.Whatisasupernet?
thenetworkforadefaultroute
asummarizationofclassfuladdresses
anetworkthatcontainsbothprivateandpublicaddresses
asetofdiscontiguousnetworksthatarecontrolledbyanISP
18.
Refertotheexhibit.Anetworkadministratorneedstocreatetwosubnetworksfrom10.0.0.0/8forarouterrunningRIPv2.TheAdminsubnetrequires120hostsandtheSalessubnetrequires58hosts.Thenetworkadministratorassigned10.0.1.128/25totheAdminsubnet.TheSalessubnetisgiven10.0.1.192/26.Whatwillbetheresultofthisaddressingscheme?
BecauseRIPv2doesnotsupportVLSM,thesubnetmaskswillnotbeallowed.
Thesubnetswillnothaveenoughhostaddressesforthegivennetworkrequirements.
Thesubnetsoverlapandwillberejectedbytherouter.
Therouterwillsupporttheaddressingscheme.
19.Arouterhasasummaryroutetonetwork192.168.32.0/20installedinitsroutingtable.Whatrangeofnetworksaresummarizedbythisroute?
192.168.0.0–192.168.32.0/24
192.168.0.0–192.168.47.0/24
192.168.32.0–192.168.47.0/24
192.168.32.0–192.168.48.0/24
192.168.32.0–192.168.63.0/24
20.
Refertotheexhibit.ThenetworkadministratorwantstominimizethenumberofentriesinRouter1’sroutingtable.Whatshouldtheadministratorimplementonthenetwork?
VLSM
CIDR
privateIPaddresses
classfulrouting
21.
Refertotheexhibit.WhatsubnetmaskwillbeappliedbyrouterBwhenitreceivesaRIPv1updateforthenetwork172.16.1.0?
22.
Refertotheexhibit.AnetworktechnicianentersthestaticrouteinR1neededtoreachnetwork10.1.1.0/24.ApingfromR1toHostBfails.Thetechnicianbeginstestingthenetworkandhasthefollowingresults:
3.pingsfromHostBtohostsonthe10.1.1.0/24network….successful
4.pingsfromHostBtotheFa0/0interfaceonR2….successful
5.pingsfromR2toHostB….successful
23.WhatisthelikelycauseofthefailureofthepingfromR1toHostB?
ThedefaultgatewayonHostBisnotcorrectlyset.
ThereisaLayer2problembetweenR2andHostB.
R2doesnothaveroutesbacktonetworksconnectedtoR1.
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- CCNA Chapter V40 Answers