2011最新10月CCNA题库word版400~500题.doc

QUESTION 401Which of the following describes the roles of devices in a WAN? (Choose three.)A. A CSU/DSU terminates a digital local loopB. A modem terminates a digital local loopC. A CSU/DSU terminates an analog local loopD. A modem terminates an analog local loopE. A router is commonly considered a DTE deviceF. A router is commonly considered a DCE deviceQUESTION 402How should a router that is being used in a Frame Relay network be configured to avoid split horizon issuesfrom preventing routing updates?A. Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interfaceB. Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast trafficC. Configure many sub-interfaces on the same subnetD. Configure a single sub-interface to establish multiple PVC connections to multiple remote routerInterfacesQUESTION 403The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?A. The Gallant router has the wrong LMI type configuredB. Inverse ARP is providing the wrong PVC information to the Gallant routerC. The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietfcommandD. The frame-relay map statement in the Attalla router for the PVC to Steele is not correctE. The IP address on the serial interface of the Attalla router is configured incorrectlyQUESTION 404As a CCNA candidate, you must have a firm understanding of the IPv6 address structure. Refer to IPv6address, could you tell me how many bits are included in each filed?A. 24B. 4C. 3D. 16QUESTION 405Refer to the exhibit. How many broadcast domains exist in the exhibited topology?A. oneB. twoC. threeD. fourE. fiveF. sixQUESTION 406Refer to the exhibit.The network administrator has created a new VLAN on Switch1 and added host C and host D. Theadministrator has properly configured switch interfaces FastEthernet0/13 through FastEthernet0/24 to bemembers of the new VLAN. However, after the network administrator completed the configuration, host Acould communicate with host B, but host A could not communicate with host C or host D. Whichcommands are required to resolve this problem?A. Router(config)# interface fastethernet 0/1.3Router(config-if)# encapsulation dot1q 3Router(config-if)# ip address B. Router(config)# router ripRouter(config-router)# network Router(config-router)# network Router(config-router)# network C. Switch1# vlan databaseSwitch1(vlan)# vtp v2-modeSwitch1(vlan)# vtp domain ciscoSwitch1(vlan)# vtp serverD. Switch1(config)# interface fastethernet 0/1Switch1(config-if)# switchport mode trunkSwitch1(config-if)# switchport trunk encapsulation islQUESTION 407On a network of one department, there are four PCs connected to a switch, as shown in the followingfigure:After the Switch1 restarts. Host A ( the host on the left ) sends the first frame to Host C (the host on theright). What the first thing should the switch do?A. Switch1 will add 2 to the switching table.B. Switch1 will add to the switching table.C. Switch1 will add 000A.8A47.E612 to the switching table.D. None of the aboveQUESTION 408Refer to the exhibit. The network administrator is in a campus building distant from Building B. WANRouteris hosting a newly installed WAN link on interface S0/0. The new link is not functioning and theadministrator needs to determine if the correct cable has been attached to the S0/0 interface. How can theadministrator accurately verify the correct cable type on S0/0 in the most efficient manner?nA. Telnet to WANRouter and execute the command show interfaces S0/0B. Telnet to WANRouter and execute the command show processes S0/0C. Telnet to WANRouter and execute the command show running-configurationD. Telnet to WANRouter and execute the command show controller S0/0E. Physically examine the cable between WANRouter S0/0 and the DCE.F. Establish a console session on WANRouter and execute the command show interfaces S0/0QUESTION 409While troubleshooting a connectivity issue from a PC you obtain the following information:Local PC IP address: 5/24Default Gateway: Remote Sever: 50/24You then conduct the following tests from the local PC:Ping SuccessfulPing 5 SuccessfulPing UnsuccessfulPing 50 UnsuccessfulWhat is the underlying cause of this problem?A. A remote physical layer problem exists.B. The host NIC is not functioning.C. TCP/IP has not been correctly installed on the host.D. A local physical layer problem exists.QUESTION 410A network administrator is troubleshooting the OSPF configuration of routers R1 and R2. The routerscannot establish an adjacency relationship on their common Ethernet link. The graphic shows the output ofthe show ip ospf interface e0 command for routers R1 and R2. Based on the information in the graphic,what is the cause of this problem?A. The OSPF area is not configured properly.B. The priority on R1 should be set higher.C. The cost on R1 should be set higher.D. The hello and dead timers are not configured properly.E. A backup designated router needs to be added to the network.F. The OSPF process ID numbers must match.QUESTION 411This graphic shows the results of an attempt to open a Telnet connection to router ACCESS1 from routerRemote27. Which of the following command sequences will correct this problem?A. ACCESS1(config)# line console 0ACCESS1(config-line)# password ciscoB. Remote27(config)# line console 0Remote27(config-line)# loginRemote27(config-line)# password ciscoC. ACCESS1(config)# line vty 0 4ACCESS1(config-line)# loginACCESS1(config-line)# password ciscoD. Remote27(config)# line vty 0 4Remote27(config-line)# loginRemote27(config-line)# password ciscoE. ACCESS1(config)# enable password ciscoF. Remote27(config)# enable password ciscoQUESTION 412When upgrading the IOS image, the network administrator receives the exhibited error message. Whatcould be the cause of this error?A. The new IOS image is too large for the router flash memory.B. The TFTP server is unreachable from the router.C. The new IOS image is not correct for this router platform.D. The IOS image on the TFTP server is corrupt.E. There is not enough disk space on the TFTP server for the IOS image.QUESTION 413CCNA考试报名1700元 180艾迪飞论坛 Which statement is true?A. An IPv6 address is 64 b long and is represented as hexadecimal characters.B. An IPv6 address is 32 b long and is represented as decimal digits.C. An IPv6 address is 128 b long and is represented as decimal digits.D. An IPv6 address is 128 b long and is represented as hexadecimal characters.QUESTION 414Which command sets and automatically encrypts the privileged enable mode password?A. enbale password c1scoB. secret enable c1scoC. password enable c1scoD. enable secret c1scoQUESTION 415In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switchedLAN?A. after broken links are re-establishedB. in an improperly implemented redundant topologyC. when upper-layer protocols require high reliabilityD. during high traffic periodsE. when a dual ring topology is in useQUESTION 416Refer to the exhibit.Which is the most efficient summarization that R1 can use to advertise its networks toR2?A. /22B. /21C. /22D. /2528/25/24/24/24E. /24/24/24/24QUESTION 417Refer to the exhibit.Based on the exhibited routing table,how will packets from a host within the92/26 LAN be forwarded to ?A. The router will forward packets from R3 to R2 to R1B. The router will forward packets from R3 to R1C. The router will forward packets from R3 to R1 to R2D. The router will forward packets from R3 to R2 to R1 AND from R3 to R1QUESTION 418Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-insecurity mechanisms?A. Frame RelayB. HDLCC. x.25D. PPPQUESTION 419Which command can be used to verify the DLCI destination address in a Frame Relay static configuration?A. show frame-relay end-to-endB. show frame-relay mapC. show frame-relay lmiCCNA考试报名1700元 183艾迪飞论坛 D. show frame-relay pvcQUESTION 420Refer to the exhibit.The network administrator requires easy configuration options and minimal routingprotocol traffic.Which two options provide adequate routing table information for traffic that passes betweenthe two routers and satisfy the requests of the network administrator?(choose two)A. a dynamic routing procotol on InternetRouter to advertise summarized routers to CentralRouter.B. a dynamic routing procotol on CentralRouter to advertise summarized routers to InternetRouter.C. a static route on InternetRouter to direct traffic that is destined for /16 to CentralRouter.D. a dynamic routing procotol on InternetRouter to advertise all routes to CentralRouer.E. a dynamic routing procotol on CentralRouer to advertise all routes to InternetRouterF. a static,default route on CentralRouter that directs traffic to InternetRouter.QUESTION 422Refer to the exibit. Three cisco 2950 switches are set to their default priority settings.During the spanning-tree process,which switch will be elected as the root bridge?A. Switch3B. Switch4C. Switch2D. Switch1QUESTION 423Which three elements must be used when you configure a router interface for vlan trunking?(choose three)A. one IP network or subnetwork for each subinterfaceB. subinterface numbering that matches vlan tagesC. subinterface encapsulation identifiers that match vlan tagsD. a management domain for each subinterfaceE. one physical interface for each subinterfaceF. one subinterface per vlanQUESTION 424A receiving host computes the checksum on a frame and determines that the frame is damaged.Theframe is then discarded.At which OSI layer did this happen?CCNA考试报名1700元 185艾迪飞论坛 A. sessionB. networkC. physicalD. data linkE. transportQUESTION 425A router receives information about network /24 from multiple sources.What will the routerconsider the most reliable information about the path to that network?A. an OSPF update for network /16B. a static router to network /24C. a static router to network /24 with a local serial interface configured as the next hopD. a RIP update for network /24E. a directly connected interface with an address of 54/24F. a default route with a next hop address of QUESTION 426Which two statements describe the advantages to the use of RIP over the use of OSPF?(choose two)A. RIP requires less time to convergeB. RIP uses less bandwidthC. RIP is less complex to configureD. RIP demands fewer router resourcesE. RIP has a more accurate metricQUESTION 427Which statement about vlan operation on cisco catalyst switches is true?A. when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MACaddress table.B. unkown unicast frames are retransmitted only to the ports that belong to the same vlanC. ports between switches should be configured in access mode so that vlans can span across the portsD. broadcast and multicast frames are retransmitted to ports that are configured on different vlan.QUESTION 428Which commands are required to properly configure a router to properly configure a router to run OSPFand to add network /24 to OSPF area 0?(choose two)A. Router(config)#router ospf 1B. Router(config)#router ospf 0C. Router(config)#router ospf area 0D. Router(config-router)#network 55 area 0E. Router(config-router)#network 55 0F. Router(config-router)#network area 0QUESTION 429The enable secret command is used to secure access to which CLI mode?A. user EXEC modeB. global configuration modeC. privileged EXEC modeD. auxiliary setup modeQUESTION 430Refer to the exhibit.Explain how the routes in the table are being affected by the status change on interfaceEthernet0.A. The router is poisoning the routes and multicasting the new path costs via interface Ethernet1.B. The router is receiving updates about unreachable networks from router that are connected to interfaceEthernet1.C. The router is poisoning the routes and broadcasting the new path costs via interface Ethernet1.D. The router is requesting updates for these networks from routers that are connected to interfaceEtherne1.QUESTION 431In which integration method is an IPV6 packet encapsulated within an IPV4 protocol?A. proxy.B. dual-stackC. tunnelingD. dot1qQUESTION 432Which two commands can be used to verify a trunk link configurationt status on a given cisco switch?(choose two)A. show interfaces interfaceB. show interfaces interface trunkC. show interfaces interface switchportD. show ip interface briefE. show interfaces vlanQUESTION 433Assuming the default switch configuration,which approach should you use to configure the extended vlanrange(1006 through 4094) on a cisco catalyst 3750 series switch?A. Configure the switch to be in VTP client mode.B. Configure the switch to be in VTP domaint mode.C. Configure the switch to be in VTP transparent mode.D. Configure the switch to be in VTPv2.QUESTION 434CCNA考试报名1700元 鸿鹄论坛： 188艾迪飞论坛 You are working in a data center environment and are assigned the address range /23.You areasked to develop an IP addressing plan to allow the maximum number of subnets with as many as 30 hostseach.Which IP address range meets these requirements?A. /27B. /26C. /29D. /28E. /25QUESTION 435Which three statements accurately describe layer 2 Ethernet switches?(choose three)A. Microsegmentation decreases the number of collisions on the network.B. if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.C. Spanning Tree Protocol allows switches to automatically share vlan information.D. In a properly functioning network with redundant switched paths,each switched aegment will contain oneroot bridge with all its ports in the forwarding state.All other switches in that broadcast domain will haveonly one root port.E. Establishing vlans increases the number of broadcast domains.F. Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3address information.QUESTION 436Refer to the exhibit.The Lakside Company has the internetwork in the exhibit.The administrator would liketo reduce the size of routing table on the Central router.Which partial routing table entry in the Central routerepresents a route summary that represents the vlans in Phoenix but no additional subnets?A. /22 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1B. /28 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1C. /22 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1D. /30 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1E. /28 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1F. /30 is subnetted,1 subnetsD 90/20514560 via ,6w0d,serial0/1QUESTION 437Refer to the exhibit.Which two devices can be used to complete the connection between the WAN router atthe customer site and the service provider?A. modemB. Frame Relay switchC. CSU/DSUD. WAN switchE. ISDN TAF. ATM switchQUESTION 438Which PPP subprotocol negotiates authentication options?A. NCPB. LCPC. ISDND. DLCIE. SLIPQUESTION 439Which two data link layers are supported by cisco ios software for IPv6?(choose two)A. PPPB. FDDIC. Frame Relay PVCD. NBMAE. Frame Relay SVCQUESTION 440Which term describes a spanning-tree network that has all switch ports in either the blocking or forwardingstate? A. redundantB. spannedC. provisionedD. convergedQUESTION 441Which two of these are characteristics of the 802.1Q protocol?(choose two)A. it is a layer 2 messaging protocol which maintains vlan configurations across network.B. it includes an 8-bit field which specifies the priority of a frame.C. it is used exclusively for tagging vlan frames and dose not address network reconvergence followingswitched network topology changes.D. it modifies the 802.3 frame header,and thus requires that the FCS be recomputed.CCNA考试报名1700元 191艾迪飞论坛 E. it is a trunking protocol capable of carring untagged frames.QUESTION 442Refer to the exhibit.Which two statements are true of the interfaces on switch1?(choose two)A. A hub is connected directly to FastEthernet0/5B. FastEthernet0/1 is configured as a trunk link.C. FastEthernet0/5 has statically assigned mac addressD. Interface FastEthernet0/2 has been disable.E. Multiple devices are connected directly to FastEthernet0/1.F. FastEthernet0/1 is connected to a host with m