CCNA考试题库-纠错题.pdf

V 30题库错误题集锦传播无罪，共享有理！此PDF纯粹出于雷锋精神制作，个人水平有限，错误在所难免，欢迎指正，大家共同交流学习。按照V30的顺序排版Question 258:Refer to the exhibit.Which switch provides the spanning-tree designated port role for thenetwork segment that services the printers?A.Switch 1B.SWitch2C.Switch3D.Switch4答 案 CQuestion 264:Refer to the exhibit.For what two reasons has the router loaded its IOS image from thelocation that is shown?(C hoose two)Ruterl skew veivioaCisco InunKvodr Operating SdftwreIOS(ta)7200 Softv&rt(C7WO-J-B,txjxnM ttal Vernon H.3(19970915:U47S2)(hAaptonutro-baftliM 249)Copyngc(c)19*7%7 讨 cueo SyiMBi.XAC.Coeiltd Vd OI-Oct-17 0(:39 by1“好 “Rb”:0 x8001900.4Mb“M:OigBMOOO108:SyiMB Bocr Vtriicn 1X.X *2 .XVTDIB SOFTVUIBOOTFUSW 7200(C7200-B00YT).Vtraoa liaConfiguration reamer is 012102A.Routerl has specific boot system commands that instruct it to load IOS from TFTP server.B.Routeri is acting as a TFTP server for other routers.C.Routerl cannot locate a valid IOS image in flash memory.D.Routerl defaulted to ROMMON mode and loaded the IOS image from a TFTP server.E.C isco routers will first attempt to load a image from TFTP for management purposes.答案为ACQuestion 266:Refer to the exhibit.Given the output from the show ip eigrp topology command,which routeris the feasible successor?routecHkov ip eigzp topology II.1.1.5 255.255.255.255IP-EIGRP topology entry for 10.0.0.S/32 Sute is Passive,Queryozigw flag Is l9 I Successor(s),T O is 41152000Produced by MarianiA10.1.0.1(SenalO),fro 10.1.0.1,Send flag is 0 x0Coiposite aetnc is(46152000/41640000),Route is InternalVector Betcic:Kmnm ba&dvidth is 64 n)itTotal deky is 45000 uccosecondsRehiiHty 255/2”-Lod 19 1/2S5 一，Kinuu M T U 19 1500Hop count is 2L lB10.0.0.2(SenalO.l),froi 10.0.0.2,Send flag 13 0 x0Coaposite leuic is(S3973248/1Z8256),Rous is InternalVector leuxc:Mwuwi bd&dvidth is 48 KbitToul deley is 25000Reliability is 2557255Hinum ITV is 1500Hop CMC u lc.10.1.0.3(SerialO),from 10.1.0.3/Send flag is 0 x0Composite m etric is(46866176/46354176),Route is InternalVector m etric:MiniBUB bandwidth is 56 KbitTotal delay is 45000 microsecondsR eliab ility 13 255/255Load is 1/255Hmmutt M TU is 1S00Hop count is 210.1.1.1(S etialO.l),on 10.1.1.1,Send flagis 0 x0Couposice m etric 13(46763776/46251776),Route is ExternalVector m etric:捌G 分。1q V也工少 oMiniBum bandwidth is 56 KbitToud delay is41000 microsecondsR eliab ility is255/255Load is 1/255HiniBUM M TU is1500Hop count is 2Produced by Marianifeasible successor条件：ADFD（A D即综合度量/后的数字）确 定 选BQuestion 272:Which statement is correct regarding the operation of DHC P?A.A DHC P client uses a ping to detect address conficts.B.A DHC P server uses a gratuitous ARP to detect DHC P clients.C.A DHC P client uses a gratuitous ARP to detect a DHC P server.D.If an address conflict is detected,the address is removed from the pool and anadministrator must resolve the conflict.E.If an address conflict is detected,the address is removed from the pool for an amount oftime configurable by the administrator.F.If an address conflict is detected,the address is removed from the pool and will not bereused until the server is rebooted.答 案 为E（1000分PASS棉花糖提供）Question 279:Refer to the exhibit.An organization connects two locations,supporting two VLANs,throughtwo switches as shown.Inter-VLANs communication is not required.The network is workingproperly and there is full connectivity.The organization needs to add additional VLANs,so ithas been decided to implement VTP.Both switches are configured as VTP servers in thesame VTP domain.VLANs added to Switch 1 are not learned by Switch2.Based on thisinformation and the partial configurations in the exhibit,what is the problem?A.Switch2 should be configured as a VTP client.B.VTP is C isco proprietary and requires a different trunking encapsulation.C.A router is required to route VTP advertisements between the switches.D.STP has blocked one of the links between the switches,limiting connectivity.Produced by MarianiE.The links between the switches are access links.答 案 EQuestion 290:Refer to the exhibit.The two exhibit devices are the only C isco devices on the network.The serialnetwork between the two devices has a mask of 255.255.255.252.Given the output that is shown,whatthree statements are true of these devices?(C hoose three.)Manchester LondonManchesterf sh cdp entry*Device ID:LondonEncry address(e s):IP addcess:10.i.l.2Platfon:cisco 2610,Capabilities:RouterIncetCace:S eria l10/0/Pott ID(outyolnQ port):SeclalO/1H o ld tiia e :12 5 sec.ipo;,上 ,2 sec Ae-40 seo Forward.300 一 Hello Tine DelayAging TimeInterfacePr io.NbrFal/1Fal/2Fa5/1Desg F.VD 4 128 1De?g FWD 4 1 2 6.4Desg FD128.257P2P一 起 近 P2pA All ports will be in a state of discarding,learning,or forwarding.B.Thirty VLANs have been configured on this switch.C.The bridge priority is lower than the default value for spanning tree.D.All interfaces that are shown are on shared media.E All designated ports are in a forwarding state.F.This switch must be the root bridge for all VLANs on this switch.答 案 ACEA user is unable to connect to the Internet.Based on the layered approach to troubleshootingand beginning with the lowest layer.Follow the guide and drag the contents to relevantmodules_ VerifypRL _ 一Verify NIC toperatiorr I-/*Verify IP configurationVerify Ethernet cable conneciion 1-.-E 1 i qSourceVerifyURLV。configuraUonI.-Verify NIC ope rat 100=r尸二一 工 巴，3，verify Ethernet cable connoctionf-:？?二二-一 匚伫，j m e t顺序反过来即为正确这题要求是从底层开始排错的Produced by Mariani此题个人认为正确选择为p p p 优 点 quality缺 点 limited flexibilityC S 优点 cost 缺点 low speedPS 优点 efficient 缺点 more complexDra the option on the left that best describes the unique advanue and disadvantage of each WAN link type tothe correct box on the right.Point to Point DidvantagePoint to Point Advantagequalitylimited flexibilityCircuit Switched AdvantageCircuit Switched Disadvantageefficientmore complexProduced by Mariani同上Question 7:A TC P/IP transfer is diagrammed in the exhibit.A window size of three has been negotiated for this transfer.Which message will be returnedfrom the receiver to the sender as part of this TC P/IPtransfer?A.send ACK 1-3B.send ACK 3C.send AC K 4D.send ACK 4-6E.send ACK 6F.send ACK 7答 案cQuestion 8:Refer to the exhibit.What is the meaning of the term dynamic as displayed in the output of theshow frame-relay map command shown?R1#show frame-relay mapSerialO/O(up),ip 172.16 3 1 dlci 100(0 x64.0 x1840),dynamicbroadcast.,status defined,activeA:The Serial0/0 interface is passing traffic.B:The DLC I 100 was dynamically allocated by the router.C:The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHC P server.D:The DLC1100 will be dynamically changed as required to adapt to changes in the FrameRelay cloud.E:The mapping between DLC I 100 and the end station IP address 172.16.3.1 was learnedthrough Inverse ARP.Produced by Mariani答 案 EQuestion 34:Which statement is correct about the internetwork shown in the diagram?FaO/1H M AVLAN1HostDServer 2Fa0/0.1-10.1.1.254/24 VLAN 1卜 0 A o 2-10 2 2 254 3 VLAN 2_ 飞 踞 咚4划。3-10.3J 2 M 3 VLAN3Ssrv-r1-_ASwitch 2 is the rootbridge.B.Spaning Tree is not runing.C.Host D and Server 1 are in the same network.D.No collisions can occur in traffic between Host B and Host C.E.lf Fa0/0 is down on Routeri,Host A cannot access Serveri.F.If Fa0/1 is down on Switch3,Host C cannot access Server2.答 案 EProduced by Mariani帧中继这题可能好多人看不懂，其实主要还是用show frame-relay map这条命令查看的。查看默认封装用show run就可以了。40.Refer to the exhibit.A system administrator installed a new switch using a script to configure it.IPconnectivity was tested using pings to SwitchB.Later attempts to access NewSwitch using Telnet fromSwitch A failed.Which statement is true?Produced by MarianiSwitchA#show spanning-tree vlan 20VLAN0020Spanning tree enabled protocol rstpRoot IDPriority24596Address0017.596d.2a00Cost38Port11(FastEthernetO/ll)Hello Time2 sec Hax Age 20 secForward Delay15 secBridge IDPriority28692(priority 28672sys-ld-ext 20)Address0017.596d.1580Hello Time2 sec Hax Age 20 secForward Delay15 secAging Time 300InterfaceRole Sts Cost Prio.Nbr TypeFaO/11 Root FMD 19 128.11 P2pFa0/12 Altn BLK 19 128.12 P2pA Executing password recovery is required.B.The virtual terminal lines are misconfigured.C.Use Telnet to connect to RouterA and then to NewSwitch to correct the error.D.Power cycle of NewSwitch will return it to a default configuration.答 案B42.Which three of these statements regarding 802.1Q trunking are correct?(C hoose three.)A.802.1Q native VLAN frames are untagged by default.B.802.1Q trunking ports can also be secure ports.C.802.1Q trunks can use 10 Mb/s Ethernet interfaces.D.802.1Q trunks require full-duplex,point-to-point connectivity.E 802.1Q trunks should have native VLANs that are the same at both ends.答 案ADEProduced by Mariani45.Which of the following correctly describe steps in the OSI data encapsulation process?(C hoose two.)A.The transport layer divides a data stream into segments and may add reliability and flow controlinformation.B.The data link layer adds physical source and destination addresses and an FC S to the segment.C.Packets are created when the network layer encapsulates a frame with source and destination hostaddresses and protocol-related control information.D.Packets are created when the network layer adds Layer 3 addresses and control information to asegment.E The presentation layer translates bits into voltages for transmission across the physical link.答 案 A C121.Which command reveals the last method used to powercycle a router?A.show reloadB.show bootC.show running-configD.show version答 案 D126.When troubleshooting a Frame Relay connection,what is the first step when performing a loopbacktest?A.Set the encapsulation of the interface to HDLC.B.Place the C SU/DSU in local-loop mode.C.Enable local-loop mode on the DC E Frame Relay router.D.Verify that the encapsulation is set to Frame Relay.答 案 DProduced by Mariani135.What two things will a router do when running a distance vector routing protocol?(C hoose two.)A Send periodic updates regardless of topology changes.B.Send entire routing table to all routers in the routing domain.C.Use the shortest-path algorithm to the determine best path.D.Update the routing table based on updates from their neighbors.E Maintain the topology of the entire nehvork in its database.这 题A B和A D有争议 个人觉得选择A D距离矢量路由发送路由表到相邻路由器224.Refer to the exhibit.Assume that all of the router interfaces are operational and configured correctly.How will router R2 be affected by the configuration of R1 that is shown in the exhibit?ISPa 200.0.0.2/30172.16.16.0/20172.16.100.1/30b/S O Q172.16.0.0/20R1 Routing Commands:Ip route 0.0,0.0 0.0.0.0 serlalO/Ooutputomitted72.16,100.128/27J72.16.100.64/26router ospfl network 172.16.100.0 0 0 0 3 area 0 network 172.16,100 64 0 0.0.63 area 0network 172 16.100128 0 0.0 31 area 0default-information originate172.16.32.0/22OSPF AreaOA Router R2 will not form a neighbor relationship with R1.B.Router R2 will obtain a full routing table,including a default route,from R1.C.R2 will obtain OSPF updates from R1.but will not obtain a default route from R1.D.R2 will not have a route for the directly connected serial network,but all other directly connectednetworks will be present,as well as the two Ethernet networks connected to R1.答 案BProduced by MarianiDrag the Cisco default administrative cistarce to the appropriate routing protocol or route.(Not all options are used.)这题错的比较无厘头9 0和1调换位置