CCNA 2 Final Exam

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  • 1/74 Questions

    Which routing protocol maintains a topology table separate from the routing table?

    • IGRP
    • RIPv1
    • RIPv2
    • EIGRP
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CCNA Quizzes & Trivia
About This Quiz

This CCNA 2 final exam assesses skills in configuring EIGRP on routers, understanding dynamic routing processes, and troubleshooting network connectivity issues. It is designed for individuals seeking to validate their technical expertise in network administration.

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  • 2. 

    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.

    Correct Answer
    A. A metric is a value used by a particular routing protocol to compare paths to remote networks.
    Explanation
    Routing protocols use metrics to determine the best path to forward network traffic. A metric is a value assigned to each path, which is used to compare the different paths to remote networks. This allows the router to select the most optimal path based on factors such as bandwidth, delay, reliability, or cost. Each routing protocol may use its own specific metric calculation algorithm, allowing for flexibility and customization. Therefore, the statement "A metric is a value used by a particular routing protocol to compare paths to remote networks" is true.

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  • 3. 

    Refer to the exhibit. A network administrator is accessing router R1 from the console port. Once the administrator is connected to the router, which password should the administrator enter at the R1> prompt to access the privileged EXEC mode?

    • Cisco001

    • Cisco123

    • Cisco789

    • Cisco901

    Correct Answer
    A. Cisco789
    Explanation
    The correct password that the administrator should enter at the R1> prompt to access the privileged EXEC mode is Cisco789.

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  • 4. 

    Refer to the exhibit. Two routers are unable to establish an adjacency. What is the possible cause for this?

    • The two routers are connected on a multiaccess network.

    • The hello and dead intervals are different on the two routers.

    • They have different OSPF router IDs.

    • They have different process IDs.

    Correct Answer
    A. The hello and dead intervals are different on the two routers.
    Explanation
    The possible cause for the two routers being unable to establish an adjacency is that the hello and dead intervals are different on the two routers. In OSPF, routers use hello packets to discover and establish adjacencies with neighboring routers. The hello interval determines how often hello packets are sent, while the dead interval determines how long a router waits to declare a neighbor as unreachable. If the hello and dead intervals are different on the two routers, they will not be able to synchronize and establish an adjacency.

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  • 5. 

    A router has learned two equal cost paths to a remote network via the EIGRP and RIP protocols. Both protocols are using their default configurations. Which path to the remote network will be installed in the routing table?

    • The path learned via EIGRP

    • The path learned via RIP

    • The path with the highest metric value

    • Both paths with load balancing

    Correct Answer
    A. The path learned via EIGRP
    Explanation
    When a router learns multiple paths to a remote network with equal cost, it will choose the path learned via the routing protocol with the lowest administrative distance. In this case, EIGRP has a lower administrative distance than RIP, so the path learned via EIGRP will be installed in the routing table.

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  • 6. 

    How does route poisoning prevent routing loops?

    • New routing updates are ignored until the network has converged.

    • Failed routes are advertised with a metric of infinity.

    • A route is marked as unavailable when its Time to Live is exceeded.

    • The unreachable route is cleared from the routing table after the invalid timer expires.

    Correct Answer
    A. Failed routes are advertised with a metric of infinity.
    Explanation
    Failed routes are advertised with a metric of infinity. This prevents routing loops by informing other routers that the route is no longer available and should not be used for forwarding packets. By assigning a metric of infinity to the failed route, it becomes an unattractive option for routing, ensuring that packets do not get trapped in a loop and preventing unnecessary traffic congestion.

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  • 7. 

    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.

    Correct Answer
    A. The configuration file is missing from NVRAM.
    Explanation
    The reason for the router booting and entering setup mode is that the configuration file is missing from NVRAM. Setup mode allows the user to manually configure the router from scratch, including setting up basic parameters such as hostname, IP address, and passwords. In this case, the router cannot find the configuration file in the non-volatile RAM (NVRAM), which stores the startup configuration. Without the configuration file, the router cannot load the necessary settings and defaults to setup mode for the user to manually configure it.

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  • 8. 

    Refer to the exhibit. The 10.4.0.0 network fails. What mechanism prevents R2 from receiving false update information regarding the 10.4.0.0 network?

    • Split horizon

    • Hold-down timers

    • Route poisoning

    • Triggered updates

    Correct Answer
    A. Split horizon
    Explanation
    Split horizon is a mechanism that prevents a router from advertising a route back onto the interface from which it was learned. In this scenario, R2 is prevented from receiving false update information about the 10.4.0.0 network because split horizon ensures that R2 does not receive updates about this network from R1, which is connected to the same interface. This mechanism helps to avoid routing loops and ensures more efficient routing in the network.

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  • 9. 

    Refer 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 command. However, upon running the show ip route command, the network administrator sees that the router has installed a different route to the 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.

    Correct Answer
    A. Compared to RIP, EIGRP has a lower administrative distance.
    Explanation
    The reason for the missing RIP route could be that EIGRP has a lower administrative distance compared to RIP. Administrative distance is a measure of the trustworthiness of a routing protocol, where a lower value indicates a higher priority. In this case, the router has chosen to install the route learned via EIGRP because it considers EIGRP to be more reliable and trustworthy than RIP. Therefore, it prioritizes the EIGRP route over the RIP route in its routing table.

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  • 10. 

    A network is configured with the IP, IPX, and AppleTalk protocols. Which routing protocol is recommended for this network?

    • RIPv1

    • RIPv2

    • EIGRP

    • OSPF

    Correct Answer
    A. EIGRP
    Explanation
    EIGRP (Enhanced Interior Gateway Routing Protocol) is recommended for a network configured with IP, IPX, and AppleTalk protocols. EIGRP is a Cisco proprietary routing protocol that supports multiple network layer protocols, including IP, IPX, and AppleTalk. It provides fast convergence, scalability, and efficient use of bandwidth. RIPv1 and RIPv2 are distance vector routing protocols that do not support multiple network layer protocols. OSPF (Open Shortest Path First) is a link-state routing protocol designed for IP networks only. Therefore, EIGRP is the best choice for this network configuration.

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  • 11. 

    Refer to the exhibit. All routers are running RIPv1. The two networks 10.1.1.0/29 and 10.1.1.16/29 are unable to access each other. What can be the cause of this problem?

    • Because RIPv1 is a classless protocol, it does not support this access.

    • RIPv1 does not support discontiguous networks.

    • RIPv1 does not support load balancing.

    • RIPv1 does not support automatic summarization.

    Correct Answer
    A. RIPv1 does not support discontiguous networks.
    Explanation
    RIPv1 does not support discontiguous networks. This means that if there are multiple networks that are not directly connected, RIPv1 will not be able to route traffic between them. In this scenario, the two networks 10.1.1.0/29 and 10.1.1.16/29 are not directly connected, so RIPv1 will not be able to establish a route between them. This is the likely cause of the problem where the two networks are unable to access each other.

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  • 12. 

    Refer to the exhibit. Both routers are using the RIP protocol. Devices on the 192.168.1.1 network can ping the S0/0/0 interface on R2 but cannot ping devices on the 192.168.2.1 network. What is a possible cause of this problem?

    • The routers are configured with different versions of RIP.

    • R2 is not forwarding the routing updates.

    • The R1 configuration should include the no auto-summary command.

    • The maximum path number has been exceeded.

    Correct Answer
    A. The routers are configured with different versions of RIP.
    Explanation
    The possible cause of the problem is that the routers are configured with different versions of RIP. The RIP protocol uses version numbers to ensure compatibility between routers. If the routers are configured with different versions, they may not be able to communicate properly and exchange routing information. This can result in devices on the 192.168.1.1 network being able to ping the S0/0/0 interface on R2, but not being able to ping devices on the 192.168.2.1 network.

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  • 13. 

    What two routing protocols use a hierarchal network topology? (Choose two.)

    • IS-IS

    • EIGRP

    • OSPF

    • RIPv1

    • RIPv2

    Correct Answer(s)
    A. IS-IS
    A. OSPF
    Explanation
    IS-IS and OSPF are two routing protocols that use a hierarchical network topology. These protocols divide the network into multiple levels or areas, allowing for efficient routing and scalability. In a hierarchical topology, routers are organized into different levels or areas, with each level having its own set of routers and a designated hierarchy. This hierarchical structure helps in reducing the complexity of routing tables and improving the overall efficiency of the network. Both IS-IS and OSPF are widely used in large enterprise networks and internet service provider networks due to their ability to handle complex network topologies effectively.

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  • 14. 

    A network administrator needs to assign the very last usable IP address in the 172.24.64.0/18 network range to the router interface that serves this LAN. Which IP address should the administrator configure on the interface?

    • 172.16.128.154/18

    • 172.16.255.254/18

    • 172.24.64.254/18

    • 172.24.127.254/18

    Correct Answer
    A. 172.24.127.254/18
    Explanation
    The given network range is 172.24.64.0/18, which means that the subnet mask is 18 bits long. This allows for a total of 2^18 - 2 = 16382 usable IP addresses. The last usable IP address in this range would be the highest IP address within the subnet. In this case, the highest IP address would be 172.24.127.254/18, as it falls within the subnet and is the last usable IP address.

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  • 15. 

    Refer 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

    Correct Answer
    A. 192.168.0.0/22
    Explanation
    R1 should use the summarization 192.168.0.0/22 to advertise its networks to R2. This is because the /22 prefix length includes both the 192.168.0.0/24 and 192.168.1.0/24 networks. By using this summarization, R1 can advertise a single route to R2 that covers both of its networks, reducing the number of routes in R2's routing table.

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  • 16. 

    Which two router component and operation pair are correctly described? (Choose two.)

    • DRAM – loads the bootstrap

    • RAM – stores the operating system

    • Flash – executes diagnostics at bootup

    • NVRAM – stores the configuration file

    • ROM – stores the backup configuration file

    • POST – runs diagnostics on hardware modules

    Correct Answer(s)
    A. NVRAM – stores the configuration file
    A. POST – runs diagnostics on hardware modules
    Explanation
    NVRAM stores the configuration file in a router, allowing the router to retain its configuration even after a power cycle. POST (Power-On Self Test) is a process that runs diagnostics on the hardware modules during the boot-up process to ensure they are functioning properly.

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  • 17. 

    Which router component is used to store the routing table?

    • Flash

    • NVRAM

    • ROM

    • SDRAM

    Correct Answer
    A. SDRAM
    Explanation
    SDRAM stands for Synchronous Dynamic Random Access Memory, and it is a type of computer memory that is used to store data temporarily. In the case of a router, SDRAM is used to store the routing table, which contains information about the various routes that the router can use to forward network traffic. The routing table is a crucial component of a router's operation, as it determines the most efficient path for data packets to travel through a network. Therefore, SDRAM plays a vital role in the functioning of a router by storing this important data.

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  • 18. 

    What command would the network administrator apply to a router that is running OSPF to advertise the entire range of addresses included in 172.16.0.0/19 in area 0?

    • R1(config-router)# network 172.16.0.0 0.0.0.255 area 0

    • R1(config-router)# network 172.16.0.0 0.0.3.255 area 0

    • R1(config-router)# network 172.16.0.0 0.0.15.255 area 0

    • R1(config-router)# network 172.16.0.0 0.0.31.255 area 0

    Correct Answer
    A. R1(config-router)# network 172.16.0.0 0.0.31.255 area 0
    Explanation
    The correct answer is "R1(config-router)# network 172.16.0.0 0.0.31.255 area 0". This command is used to advertise the entire range of addresses included in the subnet 172.16.0.0/19 in OSPF area 0. The wildcard mask 0.0.31.255 is used to specify the range of addresses to be advertised, which includes all addresses from 172.16.0.0 to 172.16.31.255.

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  • 19. 

     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, Serial0/0/0

    • O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0

    • R 172.16.1.0/24 [120/1] via 192.168.200.1, 00:00:17, Serial0/0/0

    • I 172.16.1.0/24 [100/1192] via 192.168.200.1, 00:00:09, Serial0/0/0

    Correct Answer
    A. D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0
    Explanation
    The route that will be used to reach network 172.16.1.0 is the one with the lowest administrative distance. In this case, the route with the lowest administrative distance is "D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0". The "D" indicates that this route was learned through EIGRP, and the administrative distance of EIGRP is lower than the other routing processes (such as OSPF, RIP, or BGP) that may have advertised the same network. Therefore, this route will be chosen to reach network 172.16.1.0.

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  • 20. 

    Refer to the exhibit. Both routers are using the RIPv2 routing protocol and static routes are undefined. R1 can ping 192.168.2.1 and 10.1.1.2, but is unable to ping 192.168.4.1.What is the reason for the ping failure?

    • The serial interface 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.

    Correct Answer
    A. The 192.168.4.0 network is not included in the RIP configuration of R2.
    Explanation
    The reason for the ping failure is that the 192.168.4.0 network is not included in the RIP configuration of R2. This means that R2 is not advertising the route to 192.168.4.1 to R1, causing the ping to fail.

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  • 21. 

    What is the function of the OSPF LSR packet?

    • It is used to confirm the receipt of LSUs.

    • It is used to establish and maintain adjacency with other OSPF routers.

    • It is used by the receiving routers to request more information about any entry in the DBD.

    • It is used to check the database synchronization between routers.

    Correct Answer
    A. It is used by the receiving routers to request more information about any entry in the DBD.
    Explanation
    The OSPF LSR (Link State Request) packet is used by receiving routers to request more information about any entry in the DBD (Database Description). This packet is sent when a receiving router wants more detailed information about a specific entry in the database. It helps in the synchronization and exchange of link state information between OSPF routers.

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  • 22. 

    Refer 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.

    Correct Answer(s)
    A. Configure the routers in the same area.
    A. Match the hello and dead timers on both routers.
  • 23. 

    Refer to the exhibit. An administrator is adding a new subnet of 50 hosts to R3. Which subnet address should be used for the new subnet that provides enough addresses while wasting a minimum of addresses?

    • 192.168.1.0/24

    • 192.168.1.48 /28

    • 192.168.1.32/27

    • 192.168.1.64/26

    Correct Answer
    A. 192.168.1.64/26
    Explanation
    The subnet 192.168.1.64/26 should be used for the new subnet. This subnet provides enough addresses for 62 hosts (64 addresses in total) while wasting a minimum of addresses. The other subnets have fewer available addresses or waste more addresses.

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  • 24. 

    When a router boots, what is the default order to locate the Cisco IOS if there is no boot system command?

    • ROM, TFTP server, flash

    • Flash, TFTP server, ROM

    • Flash, NVRAM, TFTP server

    • NVRAM, TFTP server, flash

    Correct Answer
    A. Flash, TFTP server, ROM
    Explanation
    When a router boots, it first checks the flash memory to locate the Cisco IOS image. If it is not found in the flash memory, the router then tries to locate the IOS image from a TFTP server. If the IOS image is still not found, the router finally looks for it in the ROM. Therefore, the correct order to locate the Cisco IOS if there is no boot system command is flash, TFTP server, ROM.

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  • 25. 

    Refer to the exhibit. All routers are properly configured to use the EIGRP routing protocol with default settings, and the network is fully converged. Which statement correctly describes the path that the traffic will use from the 10.1.1.0/24 network to the 10.1.2.0/24 network?

    • It will use the A-D path only.

    • It will use the path A-D, and the paths A-C-D and A-B-D will be retained as the backup paths.

    • It will use all the paths equally in a round-robin fashion.

    • The traffic will be load-balanced between A-B-D and A-C-D.

    Correct Answer
    A. The traffic will be load-balanced between A-B-D and A-C-D.
    Explanation
    The given exhibit shows a network with multiple routers configured with EIGRP routing protocol. Since the network is fully converged, the traffic from the 10.1.1.0/24 network to the 10.1.2.0/24 network will be load-balanced between the paths A-B-D and A-C-D. This means that the traffic will be evenly distributed between these two paths, allowing for efficient utilization of network resources and improved performance.

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  • 26. 

    Refer to the exhibit. The hosts that are connected to R2 are unable to ping the hosts that are connected to R1. How can this problem be resolved?

    • Configure the router ID on both routers.

    • Configure the R2 router interfaces for area 0.

    • Configure a loopback interface on both routers.

    • Configure the proper subnet masks on the router interfaces.

    Correct Answer
    A. Configure the R2 router interfaces for area 0.
    Explanation
    To resolve the issue of hosts connected to R2 being unable to ping the hosts connected to R1, the problem can be resolved by configuring the R2 router interfaces for area 0. This suggests that the routers are using OSPF (Open Shortest Path First) as the routing protocol, and by configuring the R2 router interfaces for area 0, they will be able to establish communication and exchange routing information with the routers in area 0 (which includes R1). This will enable the hosts connected to R2 to successfully ping the hosts connected to R1.

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  • 27. 

    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.

    Correct Answer
    A. It sends queries to adjacent neighbors until a new successor route is found.
    Explanation
    When there is no feasible successor route to a destination network and the successor route fails, EIGRP will send queries to adjacent neighbors until a new successor route is found. This is because EIGRP uses the Diffusing Update Algorithm (DUAL) to find loop-free paths, and when a route fails, it initiates a query process to find an alternative route. The queries are sent to adjacent neighbors, and if a neighbor has a feasible successor route, it will reply with the route information. This process continues until a new successor route is discovered.

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  • 28. 

    Refer to the exhibit. What information can be determined from the highlighted output?

    • Automatic summarization is disabled.

    • The 172.30.200.16/28 network is one hop away from R1.

    • A classful routing protocol is being used.

    • R1 is originating the route 172.30.200.32/28.

    Correct Answer
    A. Automatic summarization is disabled.
    Explanation
    The highlighted output indicates that automatic summarization is disabled. This means that the router is not automatically summarizing routes at network boundaries. Instead, it is advertising the specific routes.

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  • 29. 

    Refer 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 between PC1 and 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.

    Correct Answer
    A. The packets will travel via R2-R1.
    Explanation
    The packets will travel via R2-R1 because the exhibit states that R1 and R3 use different routing protocols with default administrative distance values. This means that R1 will have a lower administrative distance than R3, making it the preferred path for routing the packets.

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  • 30. 

    Which two components are used to determine the router ID in the configuration of the OSPF routing process? (Choose two.)

    • The IP address of the first FastEthernet interface

    • The highest IP address of any logical interface

    • The highest IP address of any physical interface

    • The default gateway IP address

    • The priority value of 1 on any physical interface

    Correct Answer(s)
    A. The highest IP address of any logical interface
    A. The highest IP address of any physical interface
    Explanation
    The router ID in the configuration of the OSPF routing process is determined by the highest IP address of any logical interface and the highest IP address of any physical interface. The router ID is a unique identifier assigned to each router in an OSPF network and is used to identify the router within the OSPF domain. By selecting the highest IP address of any logical interface and the highest IP address of any physical interface, it ensures that the router ID is unique and consistent across the network.

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  • 31. 

    Refer to the exhibit. All router interfaces are configured with an IP address and are operational. If no routing protocols or static routes are configured, what information will be included in the show ip route command output for router A?

    • All of the 192.168.x.0 networks will be in the routing table.

    • Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table.

    • The routing table will be empty because routes and dynamic routes have not been configured.

    • A default route is automatically installed in the routing table to allow connectivity between the networks.

    Correct Answer
    A. Routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table.
    Explanation
    If no routing protocols or static routes are configured, the only routes that will be included in the show ip route command output for router A are the directly connected networks. In this case, the router interfaces are configured with IP addresses in the 192.168.x.0 range, so the routes to networks 192.168.1.0/24, 192.168.2.0/24, and 192.168.3.0/24 will be in the routing table. Other networks outside of this range will not be included in the routing table.

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  • 32. 

    Refer to the exhibit. A network administrator has enabled RIP on routers B and C in the network diagram. Which of the following commands will prevent RIP updates from being sent to Router A?

    • A(config)# router rip A(config-router)# passive-interface S0/0

    • B(config)# router rip B(config-router)# network 192.168.25.48 B(config-router)# network 192.168.25.64

    • A(config)# router rip A(config-router)# no network 192.168.25.32

    • B(config)# router rip B(config-router)# passive-interface S0/0

    • A(config)# no router rip

    Correct Answer
    A. B(config)# router rip B(config-router)# passive-interface S0/0
    Explanation
    The command "B(config)# router rip B(config-router)# passive-interface S0/0" will prevent RIP updates from being sent to Router A by configuring the interface S0/0 as passive. A passive interface does not send or receive routing updates. Therefore, by configuring S0/0 as passive, RIP updates will not be sent from Router B to Router A.

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  • 33. 

    Refer to the exhibit. Which router is advertising subnet 172.16.1.32/28?

    • Router1

    • Router2

    • Router3

    • Router4

    Correct Answer
    A. Router4
    Explanation
    The correct answer is Router4 because it is the only router that is advertising the subnet 172.16.1.32/28. The other routers are not mentioned in the exhibit, so we cannot determine if they are advertising this subnet or not.

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  • 34. 

    All 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 secondary value will the routers 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 interface is configured.

    • The highest IP address among the active FastEthernet interfaces that are running OSPF will be used.

    • The highest IP address among the active interfaces will be used.

    Correct Answer
    A. The highest IP address among the active interfaces will be used.
    Explanation
    The router ID is a unique identifier used by routers in OSPF to identify themselves. In this scenario, since no loopback interface has been set on any of the routers, the routers will use the highest IP address among the active interfaces to determine the router ID. This means that the router with the highest IP address among its active interfaces will be chosen as the router ID.

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  • 35. 

     Refer to the exhibit. A ping between the serial interfaces of R1 and R2 is successful, but a ping between their FastEthernet interfaces fails. What is the reason for this problem?

    • The FastEthernet interface of R1 is disabled.

    • One of the default routes is configured incorrectly.

    • A routing protocol is not configured on both routers.

    • The default gateway has not been configured on both routers.

    Correct Answer
    A. One of the default routes is configured incorrectly.
    Explanation
    The reason for the problem is that one of the default routes is configured incorrectly. This means that the routing table on either R1 or R2 has a default route pointing to an incorrect next hop or destination. As a result, when the ping is sent from the FastEthernet interface, the router does not know where to send the traffic and the ping fails. However, when the ping is sent between the serial interfaces, the correct routes are used and the ping is successful.

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  • 36. 

    Refer to the exhibit. The network administrator is planning IP addressing of a new network. What part of this addressing scheme must be changed to allow communication between host A and the server?

    • The IP address of the server

    • The default gateway of host A

    • The IP address of host A

    • The default gateway of the server

    Correct Answer
    A. The IP address of the server
    Explanation
    To allow communication between host A and the server, the IP address of the server must be changed. The IP address is the unique identifier of a device on a network, and in order for host A to communicate with the server, they must be on the same network and have compatible IP addresses. By changing the IP address of the server, it can be placed on the same network as host A, enabling communication between them.

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  • 37. 

    What are two tasks that must be completed before two routers can use OSPF to form a neighbor adjacency? (Choose two.)

    • The routers must elect a designated router.

    • The routers must agree on the network type.

    • The routers must use the same dead interval.

    • The routers must exchange link state requests.

    • The routers must exchange database description packets.

    Correct Answer(s)
    A. The routers must agree on the network type.
    A. The routers must use the same dead interval.
    Explanation
    Before two routers can use OSPF to form a neighbor adjacency, they must agree on the network type. This is important because OSPF supports different network types such as point-to-point, broadcast, and non-broadcast multi-access, and the routers need to have the same understanding of the network type in order to establish a neighbor relationship. Additionally, the routers must use the same dead interval, which is the amount of time that a router waits before declaring a neighboring router as dead. Having the same dead interval ensures that both routers have the same timing for detecting and responding to router failures.

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  • 38. 

    Refer to the exhibit. Given the topology shown in the exhibit, what three commands are needed to configure EIGRP on the Paris router? (Choose three.)

    • Paris(config)# router eigrp 100

    • Paris(config)# router eigrp

    • Paris(config-router)# network 192.168.6.0

    • Paris(config-router)# network 192.168.7.0

    • Paris(config-router)# network 192.168.8.0

    • Paris(config-router)# network 192.168.9.0

    Correct Answer(s)
    A. Paris(config)# router eigrp 100
    A. Paris(config-router)# network 192.168.7.0
    A. Paris(config-router)# network 192.168.8.0
    Explanation
    The correct answer is Paris(config)# router eigrp 100, Paris(config-router)# network 192.168.7.0, Paris(config-router)# network 192.168.8.0.

    To configure EIGRP on the Paris router, the first command "Paris(config)# router eigrp 100" is used to enter the EIGRP configuration mode and specify the autonomous system number as 100.

    The next two commands "Paris(config-router)# network 192.168.7.0" and "Paris(config-router)# network 192.168.8.0" are used to specify the network addresses that should participate in EIGRP routing. These commands enable EIGRP on the interfaces associated with the specified network addresses.

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  • 39. 

    Refer to the exhibit. The network has three connected routers: R1, R2, and R3. The routes of all three routers are displayed. All routers 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

    Correct Answer
    A. From R1 to 192.168.3.1
    Explanation
    The ping from R1 to 192.168.3.1 will fail because there is no route to reach that destination in R1's routing table.

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  • 40. 

    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.

    Correct Answer(s)
    A. It forwards data packets toward their destination.
    A. It acts as an intersection between multiple IP networks.
    Explanation
    A router has two main functions. Firstly, it forwards data packets towards their destination by examining the destination IP address and using routing tables to determine the best path for the packets to take. Secondly, it acts as an intersection between multiple IP networks by connecting different networks and allowing them to communicate with each other.

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  • 41. 

    Refer to the exhibit. How many routes are ultimate routes?

    • 3

    • 4

    • 5

    • 7

    Correct Answer
    A. 5
    Explanation
    The exhibit is not provided, so it is difficult to determine the exact context of the question. However, based on the given options, the correct answer is 5. This suggests that there are five ultimate routes in the given scenario.

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  • 42. 

    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.

    Correct Answer(s)
    A. It uses the Bellman-Ford algorithm to determine the best path.
    A. It periodically sends complete routing tables to all connected devices.
    Explanation
    RIP (Routing Information Protocol) is a distance-vector routing protocol that uses the Bellman-Ford algorithm to determine the best path. This algorithm calculates the cost of each route based on the number of hops. RIP also periodically sends complete routing tables to all connected devices, ensuring that all routers have the same information about the network topology. This allows for network convergence and ensures that all routers have consistent routing information.

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  • 43. 

    Refer 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.

    Correct Answer
    A. The Fa0/1 interfaces of the two routers are configured for different subnets.
    Explanation
    The reason host A is unable to access the Internet is because the Fa0/1 interfaces of the two routers are configured for different subnets. This means that there is a mismatch in the network addresses between the routers, causing a connectivity issue for host A.

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  • 44. 

    Refer to the exhibit. A network administrator wants to reduce the size of the routing table of R1. Which partial routing table entry in R1 represents the route summary for R2, without including any additional subnets?

    • 10.0.0.0/16 is subnetted, 1 subnets D 10.5.0.0[90/205891] via 192.168.1.2, S0/0/0

    • 10.0.0.0/24 is subnetted, 4 subnets D 10.5.0.0[90/205198] via 192.168.1.2, S0/0/0

    • 10.0.0.0/22 is subnetted, 1 subnets D 10.5.0.0[90/205901] via 192.168.1.2, S0/0/0

    • 10.0.0.0/8 is subnetted, 4 subnets D 10.5.0.0[90/205001] via 192.168.1.2, S0/0/0

    Correct Answer
    A. 10.0.0.0/22 is subnetted, 1 subnets D 10.5.0.0[90/205901] via 192.168.1.2, S0/0/0
    Explanation
    The correct answer is 10.0.0.0/22 is subnetted, 1 subnets. This entry represents the route summary for R2 because it is the only entry that has a subnet mask of /22, which includes all the subnets of R2 without including any additional subnets. The other entries have different subnet masks and include additional subnets, so they do not represent the route summary for R2.

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  • 45. 

    Refer to the exhibit. What is the meaning of the highlighted value 2?

    • It is the administrative distance of the routing protocol.

    • It is the number of hops between R2 and the 192.168.8.0/24 network.

    • It is the value used by the DUAL algorithm to determine the bandwidth for the link.

    • It is the convergence time measured in seconds.

    Correct Answer
    A. It is the number of hops between R2 and the 192.168.8.0/24 network.
    Explanation
    The highlighted value 2 represents the number of hops between R2 and the 192.168.8.0/24 network.

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  • 46. 

    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.

    Correct Answer(s)
    A. Routers that run a link-state protocol can establish a complete topology of the network.
    A. The shortest path first algorithm is used.
    Explanation
    Link-state routing protocols, such as OSPF and IS-IS, allow routers to establish a complete topology of the network by exchanging information about their directly connected links. This enables routers to have a detailed understanding of the network's layout and the status of each link. Additionally, these protocols use the shortest path first algorithm to determine the best path for routing packets. This algorithm calculates the shortest path based on various metrics, such as link cost, bandwidth, and delay. Therefore, the two true statements for link-state routing protocols are that routers can establish a complete network topology and the shortest path first algorithm is used.

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  • 47. 

    Which two statements are true regarding link-state routing protocols? (Choose two.)

    • They are aware of the complete network topology.

    • They offer rapid convergence times in large networks.

    • They do not include subnet masks in their routing updates.

    • They rely on decreasing hop counts to determine the best path.

    • They do not work well in networks that require special hierarchical designs.

    • They pass their entire routing tables to their directly connected neighbors only.

    Correct Answer(s)
    A. They are aware of the complete network topology.
    A. They offer rapid convergence times in large networks.
    Explanation
    Link-state routing protocols are aware of the complete network topology, meaning they have a full understanding of all the routers and links in the network. This allows them to make more informed routing decisions based on the current state of the network. Additionally, link-state routing protocols offer rapid convergence times in large networks. This means that when there is a change in the network, such as a link failure, the routing protocol can quickly update its routing tables and adapt to the new network conditions.

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  • 48. 

    Refer to the exhibit. All routers are running the same routing protocol. Based on the exhibit and its displayed commands, which statement is true?

    • Routers B, C, and D have no access to the Internet.

    • The link to the ISP will be excluded from the routing protocol process.

    • A default route must be configured on every router.

    • The wildcard mask is incorrectly configured.

    Correct Answer
    A. The link to the ISP will be excluded from the routing protocol process.
    Explanation
    Based on the exhibit and its displayed commands, the statement "The link to the ISP will be excluded from the routing protocol process" is true. This can be inferred from the "distribute-list 1 out" command on Router A's interface connecting to the ISP. This command filters the routing updates going out of that interface, effectively excluding the link to the ISP from the routing protocol process.

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  • 49. 

    Refer to the exhibit. R1 knows two routes, Path A and Path B, to the Ethernet network attached to R3. R1 learned Path A to network 10.2.0.0/16 from a static route and Path B to network 10.2.0.0/16 from EIGRP. Which route will R1 install in its routing table?

    • Both routes are installed and load balancing occurs across both paths.

    • The route via Path B is installed because the EIGRP route has the best metric to network 10.2.0.0/16.

    • The route via Path A is installed because the static route has the best metric to network 10.2.0.0/16.

    • The route via Path B is installed because the EIGRP route has the lowest administrative distance to network 10.2.0.0/16.

    • The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16.

    Correct Answer
    A. The route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16.
    Explanation
    The correct answer is that the route via Path A is installed because the static route has the lowest administrative distance to network 10.2.0.0/16. Administrative distance is a measure of the trustworthiness of a routing protocol, where a lower value indicates a higher level of trust. In this scenario, the static route has a lower administrative distance than the EIGRP route, so it is considered more reliable and will be installed in the routing table.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 23, 2011
    Quiz Created by
    Hendrikus.hpvk

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