思科第二学期final
思科第二学期期末试题及答案
Close WindowAssessment System 1. Assessment Selection 2. Assessment Settings 3. Take Assessment 1Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2? 192.168.1.0/24 192.168.0.0/24 192.168.0.0/22 192.168.1.0/22 2If a router is booting with its default configuration register setting and its NVRAM lacks boot system commands, from try to load the IOS image first? ROM RAM NVRAM f lash flash TFTP server 3Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. result of adding this command? This route is automatically propagated throughout the network. The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0. A static route is established. A static route is established. The traffic for all Class C networks is forwarded to 172.16.1.2. 4Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.) authentication link-state advertisements h old-down timers hold-down timers Spanning Tree Protocol split horizon 5Refer to the exhibit. What information can be determined from the displayed output? E IGRP packets are waiting to be sent to the neighbors. EIGRP packets are waiting to be sent to the neighbors. The adjacencies between the routers are yet to be established. The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2. Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interf6Which statement is true about the metrics used by routing protocols? A metric is a value used by a particular routing protocol to compare paths to remote networks. A metric is a value used by a particular routing protocol to compare paths to remote networks. A common metric is used by all routing protocols. The metric with the highest value is installed in the routing table. The router may use only one parameter at a time to calculate the metric. 7Which feature of RIPv2 enables it to function as a classless routing protocol? Subnet masks are included in routing updates. Routing updates are triggered by topology changes. Next-hop addresses are included in routing updates. N ext-hop addresses are included in routing updates. Multicast addresses are used to send routing updates. 8Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured? the IP address of the Fa0/0 interface at R1 t he IP address of the Fa0/0 interface at R1 the IP address of the S0/0/1 interface at R2 the IP address of the S0/0/0 interface at R1 the subnet mask of the S0/0/1 interface at R2 9Which prompt is used to allow a user to change the IP address of an interface on a router? Router> R outer> Router# Router(config)# Router(config-if)# 10Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routeestablish a neighbor adjacency. What should the network administrator do to troubleshoot this problem? Check if the interfaces of the routers are enabled. Check the hello and dead intervals between the routers. C heck the hello and dead intervals between the routers. Check the process ID of both routers. Check if CDP is enabled on all the routers. 11Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Route interface in the same network as the serial interface of Router1? IP 172.16.0.18, subnet mask 255.255.255.0 IP 172.16.32.15, subnet mask 255.255.255.240 I P 172.16.32.15, subnet mask 255.255.255.240 IP 172.16.0.18, subnet mask 255.255.255.252 IP 172.16.32.18, subnet mask 255.255.255.252 12Refer to the exhibit. A network engineer has run the show version command on R3. Upon rebooting, R3 does not load configuration settings. What could be the cause of this problem? There is insufficient NVRAM. There is insufficient flash memory. The configuration register is not configured with the default setting. The system image file is not located in NVRAM. 13Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will b routing table? 14Refer to the exhibit. Host A is having problems accessing server A. All routers have the same EIGRP configuration a What should be done so that host A can access server A? Add the command n ono auto-summary on all routers. Change the network statements to include a wildcard mask. Adjust the EIGRP hello timers to account for the network delay. Add the command e igrpeigrp log-neighbor-changes on all routers. 15Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is the routers in this topology will respond to this event? Router4 will learn about the failed route 30 seconds later in the next periodic update. Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expire Router5 immediately flushes the unreachable route from its routing table. Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0. 16A network administrator is in charge of two separate networks that share a single building. What device will be require networks and add a common connection to the Internet that can be shared? hub router access point Ethernet switch E thernet switch 17Refer to the exhibit. A network administrator has configured OSPF using the following command: network 192.168.1.32 0.0.0.31 area 0Which router interface will participate in OSPF? FastEthernet0/0 FastEthernet0/1 Serial0/0/0 Serial0/0/1 18Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the netcommands is required to configure a single area OSPF for the networks that are connected to R2? R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 119Which two statements are true for link-state routing protocols? (Choose two.) Routers that run a link-state protocol can establish a complete topology of the network. Routers in a multipoint network that run a link-state protocol can exchange routing tables. Routers use only hop count for routing decisions. The shortest path first algorithm is used. Split horizon is used to avoid routing loops. 20Which candidate route has the longest match for a packet with a destination address of 10.30.16.48? 10.30.0.0/16 10.30.15.0/23 10.30.16.0/24 10.30.16.32/27 10.30.16.32/30 21Which statement is true about the RIPv1 protocol? It is a link-state routing protocol. It excludes subnet information from the routing updates. It uses the DUAL algorithm to insert backup routes into the topology table. It uses classless routing as the default method on the router. 22Which of the following are primary functions of a router? (Choose two.) packet switching microsegmentation domain name resolution path selection flow control 23Refer to the exhibit. Partial results of the show running-config and s how show ip route commands are displayed. Router B rec with a destination address of 10.16.1.97. What will router B do? drop the packet forward the packet via the route to 10.16.1.0 f orward the packet via the route to 10.16.1.64 forward the packet via the route to 10.16.1.64 use the default route 24 What are two ways that a router can learn of the paths to destination networks? (Choose two.) updates from other routers DHCP information broadcasts m anual configuration of routes manual configuration of routes ARP requests from connected routers inspection of the destination IP address in data packets updates from the SMTP management information base 25Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this? The IP address of host A is incorrect. The default gateway of host A is incorrect. The Fa0/1 interfaces of the two routers are configured for different subnets. T he Fa0/1 interfaces of the two routers are configured for different subnets. The subnet mask for the Fa0/0 interface of R1 is incorrect. 26A network administrator is analyzing routing update behavior on a network that has both EIGRP and OSPF configured protocols appear in the output of show ip protocols. However, only EIGRP internal routes appear in the routing tables. correctly explains the scenario? The OSPF protocol has a higher cost than EIGRP. T he OSPF protocol has a higher cost than EIGRPThe EIGRP protocol has a lower metric than OSPF. The EIGRP protocol was configured first on the router. The EIGRP protocol has a lower administrative distance than OSPF. 27Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are d are operational and pings are not blocked on this network. Which ping will fail? from R1 to 172.16.1.1 from R1 to 192.168.3.1 from R2 to 192.168.1.1 from R2 to 192.168.3.1 28Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two de this? (Choose two.) a CSU/DSU device a modem a n Ethernet switch an Ethernet switch a hub a bridge 29 In which situation would a default static route be recommended? when connecting an edge router to the Internet w hen variable length subnet masking is in effect when variable length subnet masking is in effect when there is more than one valid route for a destination network when a destination network has a larger mask than any routes in the routing table 30 Two routers need to be configured within a single OSPF area. Which two components need to be configured on boththis? (Choose two.) t he same process ID the same process ID the same area ID network addresses and wildcard masks the same router ID the same loop back address 231Refer to the exhibit. What is the meaning of the highlighted value 120? It is the metric that is calculated by the routing protocol. It is the value that is used by the DUAL algorithm to determine the bandwidth for the link. It is the administrative distance of the routing protocol. It is the hold-down time, measured in seconds, before the next update. 32Refer to the exhibit. A router learns a route to the 192.168.6.0 network, as shown in the output of the show ip rip database However, upon running the show ip route command, the network administrator sees that the router has installed a diff command, the network administrator sees that the router has installed a diffe 192.168.6.0 network learned via EIGRP. What could be the reason for the missing RIP route? Compared to RIP, EIGRP has a lower administrative distance. Compared to EIGRP , RIP has a higher metric value for the route. Compared to RIP , the EIGRP route has fewer hops. Compared to RIP , EIGRP has a faster update timer. 33 Which mechanism helps to avoid routing loops by advertising a metric of infinity? route poisoning split horizon hold-down timer triggered updates 34 A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 20LANs. Which subnet mask should the administrator use to create the new subnets? 255.255.224.0 255.255.240.0 255.255.248.0 255.255.252.0 35 A technician configures the Fa0/0 interface on a router with ip address 192.168.3.5 255.255.255.252. What additional com. What additional com issued by the technician to activate the interface to forward traffic? Router(config-if)# exitRouter(config-if)# no shutdownRouter(config-if)# clock rateRouter# copy running-config startup-config36 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a altered to accommodate a topology change? Keep the existing static route and configure a new static route with the correct next hop IP address. Negate the existing static route and configure a new static route with the correct next hop IP address. D o nothing. The existing static route will automatically update the next hop entry with the new IP address. Do nothing. The existing static route will automatically update the next hop entry with the new IP address. Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP a37Refer to the exhibit. What needs to be done to allow these two routers to connect successfully? Add a clock rate to S0/0/0 on R1. Add an interface description to S0/0/1 on R2. C hange the serial interface on R2 to S0/0/0 so that it matches R1. Change the serial interface on R2 to S0/0/0 so that it matches R1. Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1. 38Refer to the exhibit. The network administrator has run the following command on R1. R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2What is the result of running this command? Traffic for network 192.168.2.0 is forwarded to 172.16.1.2. This route is automatically propagated throughout the entire network. Traffic for all networks is forwarded to 172.16.1.2. The command invokes a dynamic routing protocol for 192.168.2.0. 39 Why is fast convergence desirable in networks that use dynamic routing protocols? Hosts are unable to access their gateway until the network is converged. Routers will not allow packets to be forwarded until the network is converged. Routers may make incorrect forwarding decisions until the network has converged. Routers will not allow configuration changes to be made until the network has converged. 40Refer to the exhibit. When all of the commands that are shown in the exhibit are entered at the correct router promp the router? name cisco router hostname 41Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (C10.0.0.0/8 64.100.0.0/16 128.107.0.0/16 172.16.40.0/24 192.168.1.0/24 192.168.2.0/24 42Refer to the exhibit. A router interface is configured with the command ip address 172.16.3.31 255.255.192.0. Which set o. Which set o values would allow a computer that is connected to the router interface to communicate with remote networks? A: 172.16.3.254 A: 172.16.3.254 B: 255.255.192.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.192.0 C: 172.16.3.255 A: 172.16.3.254 B: 255.255.255.0 C: 172.16.3.31 A: 172.16.3.31 B: 255.255.255.0 C: 172.16.3.1 43Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through three.) The router modifies the TTL field, decrementing it by one. The router changes the source IP to the IP of the exit interface. The router maintains the same source and destination IP. The router changes the source physical address to the physical address of the exit interface. The router changes the destination IP to the IP of the exit interface. The router sends the packet out all other interfaces, besides the one it entered the router on. 44Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.) The route to network 172.16.0.0 has an AD of 156160. Network 192.168.0.16 can best be reached using FastEthernet0/0. The AD of EIGRP routes has been manually changed to a value other than the default value. Router1 is running both the EIGRP and OSPF routing process. Network 172.17.0.0 can only be reached using a default route. No default route has been configured. N o default route has been configured. 45Refer to the exhibit. Which route will be installed in the routing table on R1 to forward traffic from PC1 to the web s the static route the route learned via OSPF the route learned via EIGRP both routes learned via OSPF and EIGRP 46Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this r a password? The login command was not entered on the console line. The enable password should be an enable secret password. No username and password combination has been configured. Console connections cannot be configured to require users to provide passwords. 47Refer to the exhibit. Which path will traffic from the 172.16.1.0/24 network take to get to the 10.0.0.0/24 network? ADC ABC It will load balance the traffic between ADC and ABC It will send the traffic via ABC, and will use ADC as a backup path only when ABC fails. 48A router learns about network 192.168.10.128/27 from multiple sources. Which option represents the best route and w routing table? S 192.168.10.128/27 [1/0] via 192.168.10.226 R 192.168.10.128/27 [120/2] via 192.168.10.226, 00:00:14, Serial0/0/0 O 192.168.10.128/27 [110/1563] via 192.168.10.226, 00:00:09, Serial0/0/0 D 192.168.10.128/27 [90/21026560] via 192.168.10.226, 00:00:16, Serial0/0/0 49Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly cothe routing table. What is the likely cause? The adjacent interfaces are passive. The distance of 120 exceeds 15 hops. R2 will not accept version 1 updates from R1. Routes are being summarized by R1 but not by R2. 50It is saved in the topology table for use if the primary route fails. It may be backed up by a feasible successor route. It is used by EIGRP to forward traffic to the destination. It is flagged as active in the routing table. After the discovery process has occurred, the successor route is stored in the neighbor table. 51Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem? An incorrect IP address is configured between the two routers. No static route is configured on Router2. A routing loop has occurred. No routing protocol is configured on either of the two routers. 52Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that inte FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1? A clock rate should be added to the interface configuration. The subnet mask should be added to the interface configuration. An interface description needs to be added to the interface configuration. The no shutdown command needs to be added to the interface configuration. 。
CCNA02-final3
1Which of the following are required when adding a network to the OSPF routing process conf iguration? (Choose three.)network addressloopback addressautonomous system numbersubnet maskwildcard maskarea ID2Using default settings, what is the next step in the router boot sequence after t he IOS loads from flash?Perf orm the POST routine.Search for a backup IOS in ROM.Load the bootstrap program f rom ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.3Refer to the exhibit. What is the most efficient summarization of the routes attached to router R1?198.18.0.0/16198.18.48.0/21198.18.32.0/22198.18.48.0/23198.18.49.0/23198.18.52.0/224Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statem (Choose three.)The missing information f or Blank 1 is the command show ip route .The missing information f or Blank 1 is the command debug ip route .The missing information f or Blank 2 is the number 100.The missing information f or Blank 2 is the number 120.The missing information f or Blank 3 is the letter R.The missing information f or Blank 3 is the letter C.5Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose t wo.)10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/246When presented with multiple valid routes to a destination, what criteria does a router use to determine which routes to add to the routing table?The router selects the routes with the best metric. All routes that hav e the same best metric are added to the routing table.The router f irst selects routes with the lowest administrative distance. The resulting routes are then prioritized by metric and the routes with the best metric arouting table.The router selects the routes with the lowest administrativ e distance. All routes with the same lowest administrative distanc e are added to the routing table.The router installs all routes in the routing table but uses the route with the best metric most when load balancing.7Refer to the exhibit. All routers in the network are running RIPv2 and EIGRP with default routing protocol settings and have interfaces configured with the bandwidths t exhibit. Which protocol will be used and how will traffic between the Router1 LAN and Router5 LAN be routed through the network?RIPv2 will load balance across both paths between Router1 and Router5.EIGRP will load balance across both paths between Router1 and Router5.RIPv2 traffic will use the path Router1, Router2, Router5 because it has the least hops.EIGRP traffic will use the path Router1, Router3, Router4, Router5 because it has the best metric.8Of the listed routing protocols, which two will propogate LSPs to all neighbors? (Choose two.)IS-ISEIGRPOSPFRIPv1RIPv29Refer to the exhibit. Routers 1 and 2 are directly connected over a serial link. Pings are f ailing between the two routers. W hat change by the administrator will correctSet the encapsulation on both routers to PPP.Decrease the bandwidth on Serial 0/1/0 on router 2 to 1544.Change the cable that connects the routers to a crossover cable.Change the IP address on Serial 0/1/0 on router 2 to 192.168.0.1/30.10Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)The route to network 172.16.0.0 has an AD of 156160.Network 192.168.0.16 can best be reached using FastEthernet0/0.The AD of EIGRP routes has been manually changed to a value other than the default value.Router1 is running both the EIGRP and OSPF routing process.Network 172.17.0.0 can only be reached using a default route.No default route has been conf igured.11Which statement correctly describes a feasible successor in EIGRP?It is a primary route that is stored in the routing table.It is a backup route that is stored in the routing table.It is a primary route that is stored in the topology table.It is a backup route that is stored in the topology table.12Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem?There is no gateway of last resort at R1.The serial interf ace between the two routers is down.A default route is not configured on R1.The static route for 192.168.2.0 is incorrectly conf igured.13Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required toSwitch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interf ace as a loopback interface.Set the encapsulation for the interface.14Which two locations can be the source of the Cisco IOS that is used by a router during the bootup process? (Choose two.)flash memoryRAMNVRAMTFTP serverconfiguration register15All routers in a network are configured in a single OSPF area with the same priority value. No loopback interface has been set on any of the routers. Which secondrouters use to determine the router ID?The highest MAC address among the active interfaces of the network will be used.There will be no router ID until a loopback interf ace is configured.The highest IP address among the activ e FastEthernet interfaces that are running OSPF will be used.The highest IP address among the activ e interfaces will be used.16Refer to the exhibit. A network administrator has conf igured OSPF using the following command:network 192.168.1.32 0.0.0.31 area 0Which router interf ace will participate in OSPF?FastEthernet0/0FastEthernet0/1Serial0/0/0Serial0/0/117Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The network is f ully converged. A host on th with a host on the 192.168.2.0/24 network.Which path will be used to transmit the data?The data will be transmitted v ia R3-R2.The data will be transmitted v ia R3-R1-R2.The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2.The data will be transmitted v ia R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.18Which two situations require the use of a link-state protocol? (Choose two.)Fast convergence of the network is critical.The network is very large.The network administrator has limited knowledge to configure and troubleshoot routing protocols.The network is a flat network.The capacity of the router is low.19Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the v alue that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.20In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this nD 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/021Which statement is true about the RIPv1 protocol?It is a link-state routing protocol.It excludes subnet information from the routing updates.It uses the DUAL algorithm to insert backup routes into the topology table.It uses classless routing as the default method on the router.22Refer to the exhibit. The 10.4.0.0 network f ails. What mechanism prevents R2 f rom receiving false update information regarding the 10.4.0.0 network?split horizonhold-down timersroute poisoningtriggered updates23Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.24Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undef ined. R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.16 What is the reason for the ping f ailure?The serial interf ace between two routers is down.R2 is not forwarding the routing updates.The 192.168.4.0 network is not included in the RIP configuration of R2.RIPv1 needs to be configured.25Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Adv ertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.26Refer to the exhibit. When the show cdp neighbors command is issued f rom router C, which devices will be displayed in the output?B, DA, B, DD, SWH-2SWH-1, A, BSWH-1, SWH-2A, B, D, SWH-1, SWH-227Refer to the exhibit. Although R2 is conf igured correctly, host A is unable to access the Internet. What are two static routes that can be c onfigured on R1, either of which w (Choose two.)ip route 0.0.0.0 0.0.0.0 Fa0/0ip route 0.0.0.0 0.0.0.0 Fa0/1ip route 0.0.0.0 0.0.0.0 10.1.1.1ip route 0.0.0.0 0.0.0.0 10.1.1.2ip route 209.165.202.0 255.255.255.0 10.1.1.128Which component is typically used to connect the WIC interface of a router to a CSU/DSU?V.35 cableRJ-45 adaptercrossover cablestraight-through cable29Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interf ace of Router2 in order to put the interf ace in the same networ interface of Router1?IP 172.16.0.18, subnet mask 255.255.255.0IP 172.16.32.15, subnet mask 255.255.255.240IP 172.16.0.18, subnet mask 255.255.255.252IP 172.16.32.18, subnet mask 255.255.255.25230Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D31Refer to the exhibit. OSPF is used f or the routing protocol and all interf aces are configured with the correct IP addresses and subnet masks. During testing, it is foun unable to form an adjacency with R2. What is the cause of this problem?Both routers have been configured with incorrect router IDs.Both routers have been configured in different OSPF areas.Both routers have been configured with an incorrect network type.Both routers have been configured with different hello and dead intervals.32You hav e been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have f ormed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.33 A network administrator is in charge of two separate networks that share a single building. What dev ice will be required to connect the two networks and add a comthe Internet that can be shared?hubrouteraccess pointEthernet switch34Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet35Refer to the exhibit. What needs to be done to allow these two routers to connect successf ully?Add a clock rate to S0/0/0 on R1.Add an interface description to S0/0/1 on R2.Change the serial interface on R2 to S0/0/0 so that it matches R1.Change the IP address of S0/0/1 on R2 so that it is in the same subnet as R1.36Refer to the exhibit. Based on the partial output in the exhibit, why can users establish a console connection to this router without entering a password?The login command was not entered on the console line.The enable password should be an enable secret password.No username and password combination has been configured.Console connections cannot be conf igured to require users to provide passwords.37Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.1192.168.1.138Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of pref ixes could be used to create an addressing solution with a minimum waste of IP addresses?39What is a function of a router?It extends the Layer 2 broadcast domain.It eliminates collisions among PCs on the same local network.It provides connectivity among PCs on the same physical segment.It forwards packets to different IP networks based on Layer 3 inf ormation.40Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes41Refer to the exhibit. A network administrator configures a static route on router R1 to reach the 192.168.1.0/24 network. Which IP address should be used as the next ip route command?192.168.1.1192.168.2.1192.135.250.1192.135.250.242Refer to the exhibit. The network is conf igured with RIPv2. However, network administrators notice that communication cannot be successfully completed f rom one L network administrator issues the show ip route command on the HQ router. Based on the output, what should be done to correct the problem?Disable the load balancing feature of RIPv2.Issue the no auto-summary command for RIPv2.Replace RIPv2 with EIGRP which supports VLSM.Make sure that the network statements include the correct subnet mask.43Which protocol is used by EIGRP to deliver and receive update packets?FTPRTPTCPTFTPUDP44Refer to the exhibit. What OSPF network statements are required for the router B to adv ertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 045Which two v alues are used by default to calculate a metric in EIGRP? (Choose two.) loaddelayreliabilityhop countbandwidth46Refer to the exhibit. Which statement is true concerning the routing configuration?Using dy namic routing instead of static routing would hav e required f ewer configuration steps.The 10.1.1.0/24 and 10.1.2.0/24 routes have adjacent boundaries and should be summarized.Packets routed to the R2 Fast Ethernet interface require two routing table lookups.The static route will not work correctly.47Refer to the exhibit. On the basis of the show running-config output, which option correctly ref lects the routes that will be listed in the R2 routing table?48Refer to the exhibit. Which command should be issued to configure the address of the router interface that is attached to this computer?Router(config-if)# ip address 192.168.2.1 255.255.255.0Router(config-if)# ip address 192.168.2.2 255.255.255.0Router(config-if)# ip address 192.168.0.1 255.255.255.0Router(config-if)# ip address 192.168.0.2 255.255.255.049Refer to the exhibit. Which route will be removed from the routing table if manual EIGRP summarization is disabled on the Serial0/0/0 interface of Router3?0.0.0.0/0172.16.0.0/16172.16.1.0/24172.16.3.0/3050Refer to the exhibit. All interfaces are addressed and f unctioning correctly. The network administrator runs the tracert command on host A. Which two f acts could be output of this command? (Choose two.)The gateway for Host A is missing or improperly conf igured.The gateway for Host B is missing or improperly conf igured.The entry for 192.168.1.0/24 is missing f rom the routing table of R1.The entry for 192.168.1.0/24 is missing f rom the routing table of R2.The entry for 192.168.2.0/24 is missing f rom the routing table of R1.The entry for 192.168.2.0/24 is missing f rom the routing table of R2.。
CCNA2-FINAL-(A+B+C套)英文版
CCNA第二学期《Final Examinnation》英文A卷1 What are two functions of a router? (Choose two.)It forwards data packets toward their destination.It forwards the packet to the destination if the TTL value is 0.It changes the destination IP address of data packets before forwarding them to an exit interface.It determines the best path based on the destination MAC address.It acts as an intersection between multiple IP networks.2 Which router component contains a scaled-down version of the IOS that can be used to reload a complete version of the IOS in the event that the IOS becomes damaged or corrupted?ROMFlashSDRAMNVRAM3 Using default settings, what is the next step in the router boot sequence after the IOS loads from flash? Perform the POST routine.Search for a backup IOS in ROM.Load the bootstrap program from ROM.Load the running-config file from RAM.Locate and load the startup-config file from NVRAM.4Refer to the exhibit. How many routes are ultimate routes?34575ADCABCIt will load balance the traffic between ADC and ABCIt will send the traffic via ABC, and will use ADC as a backup path only when ABC fails.6Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.Refer to the exhibit. The network is configured for OSPF routing with default settings. The bandwidths have been configured correctly for each link. If the T1 link between router A and router E fails, what path will a packet from router A take to reach the LAN attached to router F when the network has converged?A, B, C, FA, B, C, E, FA, D, G, E, FA, D, G, H, F8 In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this network?D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/09 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.10with static routeswith a routed protocolwith a routing protocolwith directly connected routes11Refer to the exhibit. What is the meaning of the highlighted value 120?It is the metric that is calculated by the routing protocol.It is the value that is used by the DUAL algorithm to determine the bandwidth for the link.It is the administrative distance of the routing protocol.It is the hold-down time, measured in seconds, before the next update.12 Which statement is true about the metrics used by routing protocols?A metric is a value used by a particular routing protocol to compare paths to remote networks.A common metric is used by all routing protocols.The metric with the highest value is installed in the routing table.The router may use only one parameter at a time to calculate the metric.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route? RIPv1RIPv2OSPFEIGRP14 Which three routing metrics are correctly defined? (Choose three.)delay - the link speedreliability - the error rate on a linkload - the amount of traffic on a linkcost - the value to indicate preference for a routehop count - the path selected with the highest bandwidthbandwidth - the amount of time it takes a packet to travel a link15 Which two statements about routing protocols are accurate? (Choose two.)OSPF supports VLSM.RIPv1 supports VLSM.RIPv2 does not have a hop count limit.EIGRP supports discontiguous network designs.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicea modeman Ethernet switcha huba bridge17 When connecting two devices, which situation would normally require the use of a crossover cable? connecting a host to a switchconnecting a switch to a routerconnecting a switch to a switchconnecting a host to a router console port18Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational?Switch the cable with a known working cable.Issue the no shutdown command on the interface.Configure the interface as a loopback interface.Set the encapsulation for the interface.19 Which port should a terminal emulator be connected to in order to access a router without network connectivity?T1serialconsoleFastEthernet20 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration21Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?10.1.1.110.1.1.2172.16.1.122Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)The command was run on the router.ABCD is a non- CISCO device.Layer 3 connectivity between two devices exists.ABCD supports routing capability.ABCD is connected to the Fa0/0 interface of the neighboring device.23Refer to the exhibit. Which statement is true about the Ethernet interfaces shown in the network?A frame leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260.A packet will not be forwarded between R1 and R2 until the no shutdown command is issued on the Fa0/0 interface of R1.24Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?RIPRIPv2EIGRPstatic routes25Refer to the exhibit. Pings are failing between HostA and HostB. The network administrator discovers that Router1 does not have a route to the 172.16.0.0 network. Assuming Router2 is configured correctly, which two static routes could be configured on Router1 to enable Host A to reach network 172.16.0.0? (Choose two.)ip route 172.16.0.0 255.255.0.0 S0/0ip route 172.16.0.0 255.255.0.0 S0/1ip route 172.16.0.0 255.255.0.0 192.168.0.1ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/0ip route 192.168.0.1 172.16.0.0 255.255.0.0 S0/126Refer to the exhibit. How was the OSPF default gateway entry for R2 determined?Default routes are automatically injected by OSPF into all advertisements.A static default gateway route is defined in the configuration of R2.The default-information originate command is applied on R1.The ISP defines the gateway of last resort and automatically passes it to R1 and R2.The ip default-gateway command is applied on R2.27Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D28192.168.2.1192.135.250.129 Because of a topology change, the next hop IP address in the current static route must be reconfigured. How can a static route entry be altered to accommodate a topology change?Keep the existing static route and configure a new static route with the correct next hop IP address.Negate the existing static route and configure a new static route with the correct next hop IP address.Do nothing. The existing static route will automatically update the next hop entry with the new IP address. Keep the existing static route, reload the router, and configure a new static route with the correct next hop IP address.30Refer to the exhibit. The entire 192.168.1.0 network has been allocated to address hosts in the diagram. Utilizing VLSM with contiguous address blocks, which set of addresses and prefixes could be used to create an addressing solution with a minimum waste of IP addresses?答案：D31Refer to the exhibit. Which host has a combination of IP address and subnet mask on the same network as Fa0/0 of Router1?host Ahost Bhost Chost D32Refer to the exhibit. If the EIGRP routing protocol is used throughout the network, which IP address and mask prefix should be sent by router R1 to the Edge router as a result of manual summarization of LANs A, B, C, and D?33Refer to the exhibit. Routers RTRA and RTRB are running OSPF. What entry does RTRA add in the routing table when Serial 0/0/0 receives an update about the network that is attached to RTRB?O 172.16.7.0/30 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.16/28 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.7.0/24 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/0O 172.16.0.0/16 [110/51] via 10.10.10.2, 00:00:25, Serial0/0/034Refer to the exhibit. If RIPv1 is used as the routing protocol throughout the network, what RIPv1 route will router R1 advertise to router R3?10.1.0.010.1.1.010.1.2.035 Which statement correctly describes a feature of RIP?RIP is a link-state routing protocol.RIP uses only one metric—hop count— for path selection.Advertised routes with hop counts greater than 10 are unreachable.Messages are broadcast every 10 seconds.36Refer to the exhibit. The network is using the RIPv2 routing protocol. If network 10.0.0.0 goes down, what mechanism will prevent Router1 from advertising false routing information back to Router2?triggered updatespoison reverseholddown timerssplit horizonroute poisoningsplit horizonhold-down timertriggered updates38Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.)The missing information for Blank 1 is the command show ip route.The missing information for Blank 1 is the command debug ip route.The missing information for Blank 2 is the number 100.The missing information for Blank 2 is the number 120.The missing information for Blank 3 is the letter R.The missing information for Blank 3 is the letter C.39Refer to the exhibit. R1 and R2 are adjacent routers both running RIP. All interfaces on both routers are correctly configured and operational. Both routers are configured to include all connected interfaces in routing updates. R2 is not showing any routes from R1 in the routing table. What is the likely cause?The adjacent interfaces are passive.The distance of 120 exceeds 15 hops.R2 will not accept version 1 updates from R1.Routes are being summarized by R1 but not by R2.40Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with defaultIt will travel via A, B, and C.It will travel via A, F, E, D, and C.It will travel via A, G, H, and C.41 Which multicast address does EIGRP use to send hello and updates packets?224.0.0.5224.0.0.6224.0.0.942 A router has EIGRP configured as the only routing protocol. In what way might EIGRP respond if there is no feasible successor route to a destination network and the successor route fails?It broadcasts hello packets to all routers in the network to re-establish neighbor adjacencies.It sends queries to adjacent neighbors until a new successor route is found.It immediately sends its entire routing table to its neighbors.It will set the metric for the failed route to infinity.43Refer to the exhibit. EIGRP 1 has been configured on R1. What is the effect of configuring the ip bandwidth-percent eigrp command?The EIGRP bandwidth routing metric will be reduced by 30%.EIGRP 1 protocol traffic will be restricted to 30% of the link bandwidth.Packets that are routed based on EIGRP routing table entries will be limited to 30% of the link bandwidth. EIGRP traffic will be permitted to burst for short periods to 30% above the configured link bandwidth.44Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)All routes are stable.Each route has one feasible successor.The administrative distance of EIGRP has been set to 50.The show ip eigrp topology command has been run on R1.45Refer to the exhibit. A network designer is testing a prototype of WAN connections. All of the routers in the exhibit are configured for OSPF routing. The design requires that the path between routers A and D through ISP-A is the primary and the path through ISP-B servers as a backup. The designer notices that router A has two equal-cost paths to the LAN on router D. How can the designer correct this problem?Issue a clock rate 2000000 interface command on S0/0/1 of router ISP-B.Change the default OSPF reference bandwidth on router A.Configure two static routes with administrative distances of 10.Use the bandwidth command to change the default bandwidth on the link to router B.46Refer to the exhibit. R1 and R2 are unable to establish an adjacency. What two configuration changes will correct the problem? (Choose two.)Set a lower priority on R2.Configure the routers in the same area.Set a lower cost on R2 compared to R1.Add a backup designated router to the network.Match the hello and dead timers on both routers.47Refer to the exhibit. If the router loopback interfaces, FastEthernet interfaces, and OSPF priorities are configured as shown, which router would win an OSPF DR election?ABCD48 Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)the same process IDthe same area IDnetwork addresses and wildcard masksthe same router IDthe same loop back address49Refer to the exhibit. What OSPF network statements are required for the router B to advertise the three networks that are attached?router ospf 1network 10.0.0.0 0.0.0.255 area 0router ospf 1network 10.1.1.0 0.3.255.255 area 0network 10.10.1.0 0.255.255.255 area 0network 10.20.1.0 0.255.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.255.255 area 0network 10.20.1.0 0.0.255.255 area 0router ospf 1network 10.1.1.0 0.0.0.3 area 0network 10.10.1.0 0.0.0.255 area 0network 10.20.1.0 0.0.0.255 area 050Refer to the exhibit. A network administrator is trying to determine why router JAX has no OSPF routes in its routing table. All routers are configured for OSPF area 0. From the JAX router, the administrator is able to ping its connected interfaces and the Fa0/1 interface of the ORL router but no other router interfaces. What is a logical step that the network administrator should take to troubleshoot the problem?Reboot the routers.Change the OSPF process ID on all of the routers to 0.Check to see if the cable is loose between ORL and JAX.Check to see if CDP packets are passing between the routers.Use show and debug commands to determine if hellos are propagating.CCNA第二学期《Final Examinnation》英文B卷1 A network administrator is in charge of two separate networks that share a single building. What device will be required to connect the two networks and add a common connection to the Internet that can be shared?hubrouteraccess pointEthernet switch2 Which two router component and operation pair are correctly described? (Choose two.)DRAM - loads the bootstrapRAM - stores the operating systemFlash - executes diagnostics at bootupNVRAM - stores the configuration fileROM - stores the backup configuration filePOST - runs diagnostics on hardware modules3 A router boots and enters setup mode. What is the reason for this?The IOS image is corrupt.Cisco IOS is missing from flash memory.The configuration file is missing from NVRAM.The POST process has detected hardware failure.4Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)5 Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?6Refer to the exhibit. Routers R1 and R3 use different routing protocols with default administrative distance values. All devices are properly configured and the destination network is advertised by both protocols.Which path will be used to transmit the data packets from PC1 to PC2?The packets will travel via R2-R1.The packets will travel via R2-R3.The traffic will be load-balanced between two paths — via R2-R1 and via R2-R3.The packets will travel via R2-R3, and the other path via R2-R1 will be retained as the backup path.R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/18Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?It will forward the packet via the FastEthernet0/0 interface.It will forward the packet via the Serial0/0/0 interface.It will forward the packet via the Serial0/0/1 interface.It will drop the packet.9 A network administrator uses the RIP routing protocol to implement routing within an autonomous system. What are two characteristics of this protocol? (Choose two.)It uses the Bellman-Ford algorithm to determine the best path.It displays an actual map of the network topology.It offers rapid convergence in large networks.It periodically sends complete routing tables to all connected devices.It is beneficial in complex and hierarchically designed networks.10 Which two statements are true for link-state routing protocols? (Choose two.)Routers that run a link-state protocol can establish a complete topology of the network.Routers in a multipoint network that run a link-state protocol can exchange routing tables.Routers use only hop count for routing decisions.The shortest path first algorithm is used.Split horizon is used to avoid routing loops.11 Which two statements are true about classless routing protocols? (Choose two.)They can be used for discontiguous subnets.They can forward supernet routes in routing updates.They cannot implement classful routes in routing tables.They use only a hop count metric.They do not include the subnet mask in routing updates.12 Which statement is true regarding routing metrics?All routing protocols use the same metrics.EIGRP uses bandwidth as its only metric.Routers compare metrics to determine the best route.The larger metric generally represents the better path.13 Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?RIPv2OSPFEIGRP14 You have been asked to explain converged networks to a trainee. How would you accurately describe a converged network?A network is converged when all routers have formed an adjacency.A network is converged immediately after a topology change has occurred.A network is converged when all routers flush the unreachable networks from their routing tables.A network is converged after all routers share the same information, calculate best paths, and update their routing tables.15Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?Router A will send the data via the A-D-E path that is listed in the routing table.Router A will load-balance the traffic between A-B-E and A-C-E.Router A will determine that all paths have equal metric cost.Router A will send the data through A-D-E and keep A-B-E and A-C-E as the backup paths.16Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)a CSU/DSU devicean Ethernet switcha huba bridge17 Which component is typically used to connect the WIC interface of a router to a CSU/DSU?V.35 cableRJ-45 adaptercrossover cablestraight-through cable18 Which router mode is accessed by entering the enable command?user EXECprivileged EXECglobal configurationinterface configuration19Refer to the exhibit. What are the effects of the exhibited commands on the router?All passwords are encrypted.Only Telnet sessions are encrypted.Only the enable password is encrypted.Only the enable password and Telnet session are encrypted.Enable and console passwords are encrypted.20Refer to the exhibit. A technician has configured the interfaces on the Router, but upon inspection discovers that interface FastEthernet0/1 is not functioning. Which action will most likely correct the problem with FastEthernet0/1?A clock rate should be added to the interface configuration.The subnet mask should be added to the interface configuration.An interface description needs to be added to the interface configuration.The no shutdown command needs to be added to the interface configuration.21Refer to the exhibit. Which two facts can be derived from this output? (Choose two.)Three network devices are directly connected to Router2.The serial interface between Router2 and Router3 is up.Router1 and Router3 are directly connected.Six devices are up and running on the network.Layer 3 functionality between routers is configured properly.22Refer to the exhibit. Which route in the routing table of R1 will be discarded by its neighboring router? 192.168.2.0192.168.3.0192.168.9.0192.168.10.0192.168.11.023Refer to the exhibit. All interfaces are addressed and functioning correctly. The network administrator runs the tracert command on host A. Which two facts could be responsible for the output of this command? (Choose two.)The gateway for Host A is missing or improperly configured.The gateway for Host B is missing or improperly configured.24 In which situation would a default static route be recommended?when connecting an edge router to the Internetwhen variable length subnet masking is in effectwhen there is more than one valid route for a destination networkwhen a destination network has a larger mask than any routes in the routing table25 What is the advantage of configuring a static route with an exit interface instead of a next-hop address?The router will perform a recursive lookup.This route will automatically be used as the gateway of last resort.The exit interface configuration consumes less router processing time.The exit interface configuration has an administrative distance value of 1.26Refer to the exhibit. On the basis of the show running-config output, which option correctly reflects the routes that will be listed in the R2 routing table?答案：D27 A static route has been configured on a router. However, the destination network no longer exists. What should an administrator do to remove the static route from the routing table?Change the routing metric for that route.Nothing. The static route will go away on its own.Change the administrative distance for that route.Remove the route using the no ip route command.28Refer to the exhibit. Hosts on the 192.168.1.0 network cannot communicate with hosts on the 172.16.1.1 network. The network administrator has run the show ip route command on R1.What could be the cause of this problem?The FastEthernet interface on R1 is disabled.Autosummarization is enabled on R1.The serial interface S0/0/0 of R1 is administratively down.No static route or routing protocol is configured.29A new static route must be configured on R1 with the R3 serial interface as the next hop.A new default route must be configured on R1 with the R3 serial interface as the next hop.The default route on R2 should be configured with the R3 serial interface as the next hop.The default route on R2 must be replaced with a new static route and the next hop should be the R1 FastEthernet interface.31Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?32Refer to the exhibit. Host A is unable to access the Internet. What is the reason for this?The IP address of host A is incorrect.The default gateway of host A is incorrect.The Fa0/1 interfaces of the two routers are configured for different subnets.The subnet mask for the Fa0/0 interface of R1 is incorrect.33Automatic summarization is enabled on R1.The routing table of R2 contains only classful networks.R2 will reject this update.The routing protocol that is configured on both routers is RIPv1.34 Which additional piece of information is included in the updates of classless routing protocols to support the use of VLSM and discontiguous networks?metricnetwork maskneighbor router IDadministrative distance35Refer to the exhibit. The network is running the RIP routing protocol. Network 10.0.0.0 goes down. Which statement is true regarding how the routers in this topology will respond to this event?Router4 will learn about the failed route 30 seconds later in the next periodic update.Split horizon will prevent Router4 from fowarding packets to the 10.0.0.0 network until the holddown timer expires.Router5 immediately flushes the unreachable route from its routing table.Router5 will send Router4 a triggered update with a metric of 16 for network 10.0.0.0.clears an unreachable route from the routing table after the invalid timer expiresprevents regular update messages from inappropriately reinstating a route that may have gone badremoves an unreachable route from the routing table after the flush timer expireslimits the period of time or number of hops a packet can traverse through the network before it should be discardedused to mark the route as unreachable in a routing update that is sent to other routers37 Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)authenticationlink-state advertisementshold-down timersSpanning Tree Protocolsplit horizon38Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?An incorrect IP address is configured between the two routers.No static route is configured on Router2.A routing loop has occurred.No routing protocol is configured on either of the two routers.39。
思科CCNA5.0Final答案汇总
1PDU 封装的正确顺序是什么？答案说明最高分值correctness of response 2 points for Option 10 points for any other option22管理员在发出 ping 命令之后在交换机上使用 Ctrl-Shift-6 键组合。
使用这些按键有什么用途？重新启动ping 进程中断 ping 进程退出到不同的配置模式允许用户完成命令要中断一个 IOS 进程（例如 ping 或 traceroute ），用户可以输入 Ctrl-Shift-6 键组合。
Tab 用于完成命令参数或变量的其余部分。
要退出配置模式并进入特权模式，可以使用 Ctrl-Z 按键。
CTRL-R 将会重新显示当前键入的行，这样便于用户按 Enter 并重新发出 ping 命令。
答案说明最高分值correctness of response 2 points for Option 2 0 points for any other option23 建立融合网络有何用途？为所有终端设备提供高速连接确保平等对待所有类型的数据包实现数据网络基础架构设备的容错能力和高可用性降低部署和维护通信基础设施的成本随着技术的发展，各个公司现在可以将不同的网络整合到一个平台之上，称为融合网络。
在融合网络中，语音、视频和数据通过同一网络传输，从而使人们不必再创建和维护各个单独的网络。
这也降低了提供和维护通信网络基础设施相关的成本。
答案说明最高分值correctness of response 2 points for Option 40 points for any other option24请参见图示。
哪个区域最有可能是图中所示的公司网络的外联网？区域A区域B区域C区域D外联网是外部实体访问其他公司的数据的平台。
其形式可能是产品供应商所使用的库存服务器，也可能是外部实体用来访问当天客户数量的当前信息的Web 服务器。
思科网络第二学期Final考试及答案
思科网络第二学期Final考试及答案思科网络第二学期Final考试及答案1.请参见图示。
对于发往 192.168.2.0的数据包，R2会采取什么操作？它会丢弃数据包。
2.请参见图示。
R1会使用哪一总结地址来向 R2通告其网络？192.168.0.0/223.请参见图示。
尽管R2已配置正确，但主机A还是无法访问Internet。
可以在R1上配置哪两条可让主机A访问Internet的静态路由？（选择两项。
ip route 0.0.0.0 0.0.0.0 Fa0/1ip route 0.0.0.0 0.0.0.0 10.1.1.24.请参见图示。
网络管理员已按图示配置了R1，并且所有接口都运作正常。
但从R1 ping 172.16.1.1时失败。
造成此问题的原因可能是什么？默认路由配置有误。
5.请参见图示。
所有接口都已编址，并且运行正常。
网络管理员在主机A上运行了tracert命令。
得到这种输出的原因可能是什么？（选择两项。
）R2的路由表中缺少 192.168.1.0/24的条目。
R1的路由表中缺少 192.168.2.0/24的条目。
6.请参见图示。
从主机 A到主机 B的 ping成功，但从主机 A ping 在Internet上正常运行的主机却失败了。
此问题的原因是什么？未在这两台路由器上配置路由协议。
7.网络管理员使用 RIP路由协议在一个自治系统内实施路由。
下列哪两项是该协议的特征？（选择两项。
使用贝尔曼-福特算法确定最佳路径。
定期将完整的路由表发送给所有连接的设备。
8.请参见图示。
两台路由器无法建立相邻关系。
此问题的原因可能是什么？这两台路由器上的 hello间隔和 dead间隔不同9.在两台路由器能够使用 OSPF形成邻居邻接关系之前必须完成哪两项任务？（选择两项。
）路由器必须在网络类型方面达成一致。
路由器必须使用相同的 dead时间间隔。
10.下列关于链路状态路由协议的陈述，哪两项是正确的？（选择两项。
final2-3
第二学期FINAL1请参见图示。
在路由器上执行如图所示的命令会产生什么效果？所有的口令都将加密。
仅加密Telnet 会话。
仅加密使能口令。
仅加密使能口令和Telnet 会话。
将加密使能口令和控制台口令。
2向OSPF 路由过程配置中添加网络时，需要下列哪几项？（选择三项。
）网络地址环回地址自治系统编号子网掩码通配符掩码区域ID3使用默认设置时，在路由器的启动过程中，从闪存加载IOS 后的下一步是做什么？执行POST 例程。
在ROM 中搜索备份IOS。
从ROM 加载bootstrap 程序。
从RAM 加载运行配置文件。
在NVRAM 中查找并加载启动配置文件。
4请参见图示。
该网络正在运行RIP 路由协议。
网络10.0.0.0 突然断开。
下列有关此拓扑结构中路由器如何响应该事件的陈是正确的？Router4 将在30 秒之后的下一次定期更新中获知该失效路由。
在抑制计时器超时之前，水平分割将阻止Router4 向10.0.0.0 网络转发数据包。
Router5 将立即从路由表中清除这一失效路由。
Router5 将向Router4 发送触发更新，其中网络10.0.0.0 的度量为16。
5请参见图示。
图中显示了路由器R2 上show ip route命令的结果。
目的地址为10.1.4.1 的数据包会选择哪条路由？到0.0.0.0/0 的路由到10.1.0.0/22 的路由到10.1.0.0/23 的路由到10.1.0.0/24 的路由6在两台路由器能够使用OSPF 形成邻居邻接关系之前必须完成哪两项任务？（选择两项。
）路由器必须选举出指定路由器。
路由器必须在网络类型方面达成一致。
路由器必须使用相同的dead 时间间隔。
路由器必须交换链路状态请求。
路由器必须交换数据库描述数据包。
7请参见图示。
哪一项是对连接到路由器R1 的路由的最有效总结？198.18.0.0/16198.18.48.0/21198.18.32.0/22198.18.48.0/23198.18.49.0/23198.18.52.0/228请参见图示。
Final
/share/detail/12694909#content思科［Cisco］网院第二学期Final题目参加考试- DsmbISP Final Exam - CCNA Discovery: 在中小型企业或ISP 工作(版本4.1)1请参见图示。
主机A 无法ping 通R1。
应在R1 上执行哪两项配置步骤以解决此问题？（选择两项。
）C正确配置访问该路由器的线路口令。
配置接口速率。
管理性启用接口。
在路由器上配置动态路由协议。
在路由器上正确配置子网掩码。
2 一个网络横跨相距500 英尺（152 米）的两栋楼房。
在电缆路径附近装有一台电力变压器。
该网络应使用哪种类型的电缆？DSTPUTP同轴光纤3 以下哪种说法正确描述了AAA 的功能？A防止对网络进行未授权的访问。
根据目的IP 和端口号过滤流量。
使用户可以发送信息到运行在管理站上的守护进程。
加密数据以保障网络安全性。
4请参见图示。
从图中所示的输出中可得出什么结论？C此路由器上启用了PPP。
接口的带宽设置符合T1 连接要求。
serial0/0/0 接口已管理性关闭。
``````````````````````````````serial0/0/0 接口设置了默认封装。
serial0/0/0 接口设置了子网掩码255.255.255.255。
5请参见图示。
哪些电缆路径段需要使用交叉电缆？CA、D、FB、C、EB、D、EA、C、F6 为了将初始配置加载到一台新的交换机上，网络管理员将一台笔记本电脑通过控制台电缆连接到这台交换机上。
大约一分钟后，网络管理员启动了该交换机，发现交换机前部的SYST LED 从闪烁的绿色转为琥珀色。
请问这意味着什么？笔记本电脑与交换机之间的物理连接不正确。
交换机正在等待配置文件加载。
交换机的一个端口出现故障。
```````````````````` 交换机POST 失败。
D7 UDP 具有哪项特点？ C是一种可靠的传输协议。
要求源主机重新发送未得到确认的数据包。
思科第二学期答案1-4章
第一章路由和数据包转发介绍1．哪两项说法正确描述了路由器的组件（选择两项）（B、D）A．RAM 永久存储着在启动过程中使用的配置文件B．ROM 含有硬件模块所执行的诊断程序C．NVRAM 存储着在启动过程中使用的IOS 的备份副本D．重新启动时闪存中的内容不会丢失E．ROM 包含最新而且最完整的IOS 版本F．闪存包含用于标识IOS 位置的启动系统命令2．图中的哪些接口可用于租用线路WAN 连接（选择两项）（A、D）A．1B．2C．3D．4E．5F．63．如果路由器在启动时无法找到有效的配置文件，将发生什么情况（B）A．启动过程将重置B．路由器将提示用户进行响应，以进入设置模式C．启动过程将停止，直到获得有效的配置文件D．路由器将根据上次的有效配置生成默认配置文件E．路由器将监控本地流量，以确定路由协议配置要求4．以下哪一项正确描述了路由器启动时的顺序（A）A．加载bootstrap、加载IOS、应用配置B．加载bootstrap、应用配置、加载IOSC．加载IOS、加载bootstrap、应用配置、检查硬件D．检查硬件、应用配置、加载bootstrap、加载IOS5．加载配置文件时的默认顺序是怎样的（C）A．NVRAM、FLASH、ROM B．FLASH、TFTP、CONSOLE C．NVRAM、TFTP、CONSOLE D．FLASH、TFTP、ROM6．在启动过程中，路由器可以从哪些位置加载Cisco IOS（选择两项）（B、E）A．RAM B．TFTP 服务器C．NVRAM D．设置例程E．闪存F．终端7．下列哪些是路由器的功能（选择三项）（A、C、D）A．分组交换B．网段扩展C．广播域分段D．根据逻辑编址选择最佳路径E．根据物理编址选择最佳路径8．当路由器收到从一个网络发往另一个网络的数据包时，它会执行哪三个过程（选择三项）（A、D、E）A．通过解开第2 层帧报头来解封第3 层数据包B．通过IP 报头中的目的MAC 地址在路由表中查找下一跳地址C．解封第3 层数据包时将第2 层帧报头保持原样D．通过IP 报头中的目的IP 地址在路由表中查找下一跳地址E．将第3 层数据包封装成新的第2 层帧，并将该帧从送出接口转发出去F．将第3 层数据包封装成特殊的第1 层帧，并将该帧转发到送出接口9．网络管理员需要通过路由器的FastEthernet 端口直接连接两台路由器。
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思科第二学期final考试答案1 关于数据包通过路由器传输时的封装和解封的叙述，下列哪三项是正确的？（选择三项。
）路由器修改TTL 字段，将其值减1。
路由器将源IP 更改为送出接口的IP。
路由器保持相同的源IP 和目的IP。
路由器将源物理地址更改为送出接口的物理地址。
路由器将目的IP 更改为送出接口的IP。
路由器会从所有接口将数据包转发出去，包括路由器接收数据包时使用的那个接口。
评分规则： correctness of response2请参见图示。
当数据包发往哪两个网络时需要路由器执行递归查找？（选择两项。
）10.0.0.0/864.100.0.0/16128.107.0.0/16172.16.40.0/24192.168.1.0/24192.168.2.0/24评分规则： correctness of response3 对于为防止路由环路而通过毒性反转实现的水平分割方法，哪两项叙述正确？（选择两项。
）所有Cisco IOS 都会默认启用此方法。
会将一个表示无穷大度量的值分配给路由以将其毒化。
将毒化路由更新发回该更新的发送接口。
指示路由器将可能会影响路由的更改保持一段特定的时间。
限制数据包在被丢弃之前能够在网络中传输的跳数。
评分规则： correctness of response4网络管理员在所示网络图中的路由器B 和C 上启用了RIP。
什么命令可防止向路由器A 发送RIP 更新？A(config)# router ripA(config-router)# passive-interface S0/0B(config)# router ripB(config-router)# network 192.168.25.48B(config-router)# network 192.168.25.64A(config)# router ripA(config-router)# no network 192.168.25.32B(config)# router ripB(config-router)# passive-interface S0/0A(config)# no router rip评分规则： correctness of response5请参见图示。
根据如图所示的输出，下列哪两项陈述是正确的？（选择两项。
）所有路由都处于稳定状态。
每条路由都有一个可行后继。
两台路由器之间的串行接口关闭。
E IGRP 的管理距离已设置为50。
R1 上已运行了show ip eigrp topology 命令。
评分规则： correctness of response6请参见图示。
下列关于Router1 路由表的陈述，哪三项是正确的？（选择三项。
）到网络172.16.0.0 的路由的AD 为156160。
F astEthernet0/0 具有到达网络192.168.0.16 的最佳路径。
E IGRP 路由的AD 已经手动更改为默认值以外的其它值。
R outer1 正同时运行着EIGRP 和OSPF 路由过程。
仅能通过默认路由到达网络172.17.0.0。
尚未配置任何默认路由。
评分规则： correctness of response7 下列路由器组件和操作的配对中，哪两项是正确的？（选择两项。
）D RAM - 加载bootstrapR AM - 存储操作系统闪存- 启动时执行诊断N VRAM - 存储配置文件R OM - 存储备份配置文件P OST - 运行硬件模块诊断评分规则： correctness of response8 在两台路由器能够使用OSPF 形成邻居邻接关系之前必须完成哪两项任务？（选择两项。
）路由器必须选举出指定路由器。
路由器必须在网络类型方面达成一致。
路由器必须使用相同的dead 时间间隔。
路由器必须交换链路状态请求。
路由器必须交换数据库描述数据包。
评分规则： correctness of response9 下列哪两项是路由器的功能？（选择两项。
）连接多个IP 网络。
通过使用第2 层地址控制数据流。
确定发送数据包的最佳路径。
管理VLAN 数据库。
扩大广播域。
评分规则： correctness of response10请参见图示。
下列有关所示网络中快速以太网接口的陈述，哪一项是正确的？帧离开R1 的接口Fa0/0，源MAC 地址为000C.3010.9260。
10.1.1.0/24 中的主机将使用172.16.3.1/24 作为其默认网关。
除非对R1 的Fa0/0 接口发出no shutdown 命令，否则R1 和R2 之间不会转发数据包。
R2 的Fa0/0 接口可以使用IP 地址172.16.4.1/24 配置，配置后在该链路上仍然具有连通性。
评分规则： correctness of response11请参见图示。
网络管理员将此命令添加到路由器R1：ip route 192.168.2.0 255.255.255.0 S0/0/0。
添加此命令会产生什么结果？此路由会在网络中自动传播。
发往网络172.16.1.0 的流量被转发到网络192.168.2.0。
建立一条静态路由。
所有C 类网络的流量都被转发到172.16.1.2。
评分规则： correctness of response12请参见图示。
命令ip route 0.0.0.0 0.0.0.0 S0/0/0 已在路由器R2 上生效。
此命令会产生哪两项结果？（选择两项。
）会在路由表中更新静态路由。
来自Internet 的流量会转发给R2。
来自源网络172.16.0.0/22 的流量会被拦截。
该路由会被指定为到路由表中所有未定义的网络的默认路由。
所有广播都会通过R2 的S0/0/0 接口转发。
评分规则： correctness of response13请参见图示。
网络管理员从R3 上成功ping 通了R1。
接下来，管理员在R3 上运行了show cdp neighbors 命令。
图中显示了该命令的输出。
输出中缺少R1 的两个原因是什么？（选择两项。
）R1 和R3 之间有连通性问题。
R1 的Fa0/0 接口配置了不正确的IP 地址。
在R1 上运行了no cdp run 命令。
对R3 的Fa0/1 接口运行了no cdp enable 命令。
关闭了R1 的电源。
评分规则： correctness of response14请参见图示。
所有路由器都正确配置了默认值，且正在运行OSPF 路由协议。
此网络已完全收敛。
192.168.3.0/24 网络中的主机要与192.168.2.0/24 网络中的主机通信。
会使用哪条路径来传输数据？数据会通过R3-R2 传输。
数据会通过R3-R1-R2 传输。
流量会在两条路径（R3-R2 和R3-R1-R2）间进行负载均衡。
数据会通过R3-R2 传输，而另一条通过R3-R1-R2 的路径则会留作备用路径。
评分规则： correctness of response15 下列哪两种情形需要使用链路状态协议？（选择两项。
）网络对收敛速度的要求极高。
网络非常庞大。
网络管理员没有足够的知识来配置路由协议及排查其故障。
网络采用的是平面设计。
路由器的性能较低。
评分规则： correctness of response16请参见图示。
突出显示的值120 表示什么意思？路由协议计算出的度量。
D UAL 算法使用该值来确定该链路的带宽。
路由协议的管理距离。
收到下一个更新前的抑制时间，单位为秒。
评分规则： correctness of response17 在复杂的实验室测试环境中，路由器通过使用RIP 路由进程发现了四条通往192.168.1.0/24 的路径。
其中哪条路由会被添加到路由表中？R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/1评分规则： correctness of response18请参见图示。
所有路由器都已正确配置为使用RIP 路由协议（使用默认设置），并且网络已完全收敛。
路由器A 要将数据转发给路由器E。
下列哪一个有关路由路径的说法正确？路由器A 会通过路由表中列出的A-D-E 路径发送数据。
路由器A 会将流量在A-B-E 和A-C-E 之间进行负载均衡。
路由器A 会确定所有路径都具有相等的开销度量。
路由器A 会通过A-D-E 发送数据，并将A-B-E 和A-C-E 留作备用路径。
评分规则： correctness of response19 一台使用RIP 路由协议的路由器在路由表中存有到某个网络的路由条目。
后来，路由器收到另一条到同一目的网络的路由条目的更新，且与前者比，该路由跳数较少。
对于此更新，路由器会采取什么操作？路由器会将更新信息附加到路由表中。
路由器会将路由表中到该网络的路由条目标记为无效。
路由器会用新信息替换现有的路由表条目。
路由器会忽略新的更新。
评分规则： correctness of response20请参见图示。
PC1 无法访问Internet。
此问题的原因是什么？两台路由器之间配置了错误的IP 地址。
R outer2 上未配置静态路由。
出现了路由环路。
两台路由器上均未配置路由协议。
评分规则： correctness of response21请参见图示。
所有路由器都配置为运行RIPv1，并已完全收敛。
R3 会收到下列哪项所述的路由更新？192.168.1.0/24 和192.168.2.0/24 的更新172.16.2.0/24 和172.16.3.0/24 的更新172.16.1.0/24、172.16.2.0/24 和172.16.3.0/24 的更新172.16.0.0/16 的更新评分规则： correctness of response22 下列哪种机制可通过通告无穷大度量来防止路由环路？路由毒化水平分割抑制计时器触发更新评分规则： correctness of response23 哪种路由协议默认使用带宽和延迟来计算路由的度量？R IPv1R IPv2O SPFE IGRP评分规则： correctness of response24请参见图示。