Ccna2 Final Exam V1

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Ccna2 Final Exam V1 - Quiz

Questions and Answers
  • 1. 

    1. Which of the following are required when adding a network to the OSPF routing process configuration?

    • A.

      Network address

    • B.

      Loopback address

    • C.

      Autonomous system number

    • D.

      Subnet mask

    • E.

      Wildcard mask

    • F.

      Area ID

    Correct Answer(s)
    A. Network address
    E. Wildcard mask
    F. Area ID
    Explanation
    When adding a network to the OSPF routing process configuration, the network address, wildcard mask, and area ID are required. The network address is the IP address of the network that is being added. The wildcard mask is used to specify which IP addresses within the network should be included in the OSPF routing process. The area ID is used to identify the OSPF area to which the network belongs. The loopback address, autonomous system number, and subnet mask are not required for adding a network to the OSPF routing process configuration.

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  • 2. 

    2. Which of the following are primary functions of a router? (Choose two.)

    • A.

      Packet switching

    • B.

      Microsegmentation

    • C.

      Domain name resolution

    • D.

      Path selection

    • E.

      Flow control

    Correct Answer(s)
    A. Packet switching
    D. Path selection
    Explanation
    A router is a networking device that connects multiple networks together and forwards data packets between them. One of the primary functions of a router is packet switching, where it receives data packets from one network and forwards them to the appropriate network based on the destination IP address. This allows for efficient and reliable communication between different networks. Another primary function of a router is path selection, where it determines the best path for data packets to travel through the network based on factors such as network congestion, latency, and cost. This ensures that data packets reach their destination in the most efficient and timely manner possible.

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  • 3. 

    3. Refer 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.)

    • A.

      The missing information for Blank 1 is the command show ip route.

    • B.

      The missing information for Blank 1 is the command debug ip route.

    • C.

      The missing information for Blank 2 is the number 100.

    • D.

      The missing information for Blank 2 is the number 120.

    • E.

      The missing information for Blank 3 is the letter R.

    • F.

      The missing information for Blank 3 is the letter C.

    Correct Answer(s)
    A. The missing information for Blank 1 is the command show ip route.
    D. The missing information for Blank 2 is the number 120.
    F. The missing information for Blank 3 is the letter C.
    Explanation
    The exhibit is referring to the output of various router commands. Based on the exhibit, the missing information for Blank 1 is the command "show ip route." This command is used to display the routing table of the router. The missing information for Blank 2 is the number 120, which is the administrative distance of the route. Administrative distance is a measure of the trustworthiness of a routing protocol. The missing information for Blank 3 is the letter C, which represents a directly connected network in the routing table. Therefore, the three true statements are: The missing information for Blank 1 is the command "show ip route," The missing information for Blank 2 is the number 120, and The missing information for Blank 3 is the letter C.

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  • 4. 

    4. Refer to the exhibit. Packets destined to which two networks will require the router to perform a recursive lookup? (Choose two.)

    • A.

      10.0.0.0/8

    • B.

      64.100.0.0/16

    • C.

      128.107.0.0/16

    • D.

      172.16.40.0/24

    • E.

      192.168.1.0/24

    • F.

      192.168.2.0/24

    Correct Answer(s)
    A. 10.0.0.0/8
    F. 192.168.2.0/24
    Explanation
    The router will need to perform a recursive lookup for packets destined to the networks 10.0.0.0/8 and 192.168.2.0/24. This means that the router will need to consult its routing table to determine the next hop for these networks. The other networks listed in the exhibit can be directly reached without the need for a recursive lookup.

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  • 5. 

    5. When would the network administrator use the ip bandwidth-percent eigrp as-number percent command?

    • A.

      When there is a low bandwidth connection

    • B.

      When the connection is on a shared medium

    • C.

      When the connection is serial instead of Ethernet

    • D.

      When the link is always busy

    Correct Answer
    A. When there is a low bandwidth connection
    Explanation
    The network administrator would use the "ip bandwidth-percent eigrp as-number percent" command when there is a low bandwidth connection. This command allows the administrator to specify the percentage of bandwidth that EIGRP can use on the specified interface. By setting a lower percentage, the administrator can ensure that EIGRP does not consume all the available bandwidth, which is important in low bandwidth connections where preserving bandwidth is crucial.

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  • 6. 

    6. Refer to the exhibit. Cost for each path are shown. If all routers are configured to use OSPF, what would be the path of a packet sent from Router C to Router D if Router A was down?

    • A.

      C-B-E-D

    • B.

      C-B-A-D

    • C.

      C-F-E-D

    • D.

      C-F-B-A-D

    • E.

      C-F-E-A-D

    Correct Answer
    C. C-F-E-D
    Explanation
    If Router A is down, the packet sent from Router C to Router D would follow the path C-F-E-D. This is because Router C would first send the packet to Router F, then Router F would send it to Router E, and finally Router E would forward it to Router D.

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  • 7. 

    7. What OSPF packet type is used to elect the designated router (DR) and backup designated router (BDR) on multiaccess networks?

    • A.

      Hello

    • B.

      LSU

    • C.

      LSR

    • D.

      DBD

    • E.

      LSAck

    Correct Answer
    A. Hello
    Explanation
    The correct answer for this question is "hello". In OSPF, the "hello" packet type is used to elect the designated router (DR) and backup designated router (BDR) on multiaccess networks. The DR and BDR are responsible for maintaining neighbor relationships and exchanging routing information with other routers on the network. The "hello" packets are sent periodically to discover and maintain neighbor relationships, and during this process, the DR and BDR are elected based on priority and router ID.

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  • 8. 

    8. Refer to the exhibit. The hosts on the R1 LAN are unable to access the Internet. What is incorrectly configured?

    • A.

      The IP address of the Fa0/0 interface at R1

    • B.

      The IP address of the S0/0/1 interface at R2

    • C.

      The IP address of the S0/0/0 interface at R1

    • D.

      The subnet mask of the S0/0/1 interface at R2

    Correct Answer
    C. The IP address of the S0/0/0 interface at R1
    Explanation
    The correct answer is the IP address of the S0/0/0 interface at R1. This is likely the incorrect configuration because the hosts on the R1 LAN are unable to access the Internet. Since the hosts are connected to the LAN interface of R1, it is crucial that the IP address on this interface is properly configured to allow communication between the LAN and the Internet.

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  • 9. 

    9. Refer to the exhibit. Which summarization should R1 use to advertise its networks to R2?

    • A.

      192.168.1.0/24

    • B.

      192.168.0.0/24

    • C.

      192.168.0.0/22

    • D.

      192.168.1.0/22

    Correct Answer
    C. 192.168.0.0/22
    Explanation
    R1 should use the summarization 192.168.0.0/22 to advertise its networks to R2. This summarization includes both the networks 192.168.1.0/24 and 192.168.0.0/24, as well as additional addresses in the range of 192.168.0.0/22. By using this summarization, R1 can efficiently advertise its networks to R2 without unnecessarily advertising individual subnets.

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  • 10. 

    10. Refer to the exhibit. What are two of the routes added to the routing table of R1? (Choose two.)

    • A.

      R 172.16.1.0/24 [120/1] via 192.168.3.0, 00:00:24, Serial0/0/0

    • B.

      R 192.168.1.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/1

    • C.

      R 192.168.9.0/24 [120/1] via 172.16.1.2, 00:00:24, Serial0/0/0

    • D.

      R 192.168.100.0/24 [120/1] via 172.16.1.1, 00:00:24, Serial0/0/0

    • E.

      R 192.168.2.0/24 [120/1] via 172.16.1.2, 00:00:24, Serial0/0/0

    Correct Answer(s)
    B. R 192.168.1.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/1
    D. R 192.168.100.0/24 [120/1] via 172.16.1.1, 00:00:24, Serial0/0/0
    Explanation
    The routes added to the routing table of R1 are:
    1. R 192.168.1.0/24 [120/1] via 172.16.2.1, 00:00:24, Serial0/0/1
    2. R 192.168.100.0/24 [120/1] via 172.16.1.1, 00:00:24, Serial0/0/0

    These routes indicate that R1 has learned about two networks: 192.168.1.0/24 and 192.168.100.0/24. The next hop for the first network is 172.16.2.1, and the next hop for the second network is 172.16.1.1. These routes were learned via the Serial0/0/1 and Serial0/0/0 interfaces respectively. The administrative distance for both routes is 120, and the metric is 1.

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  • 11. 

    11. A router boots and enters setup mode. What is the reason for this?

    • A.

      The IOS image is corrupt.

    • B.

      Cisco IOS is missing from flash memory.

    • C.

      The configuration file is missing from NVRAM.

    • D.

      The POST process has detected hardware failure.

    Correct Answer
    C. 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. NVRAM (Non-Volatile Random Access Memory) is where the router stores its startup configuration. If this file is missing, the router will boot into setup mode, allowing the user to manually configure the router's settings. This could happen if the configuration file was accidentally deleted or if there was an issue with saving the configuration to NVRAM.

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  • 12. 

    12. 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?

    • A.

      Compared to RIP, EIGRP has a lower administrative distance.

    • B.

      Compared to EIGRP, RIP has a higher metric value for the route.

    • C.

      Compared to RIP, the EIGRP route has fewer hops.

    • D.

      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 as a more reliable and preferred routing protocol due to its lower administrative distance.

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  • 13. 

    13. 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?

    • A.

      The highest MAC address among the active interfaces of the network will be used.

    • B.

      There will be no router ID until a loopback interface is configured.

    • C.

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

    • D.

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

    Correct Answer
    D. The highest IP address among the active interfaces will be used.
    Explanation
    In a network where all routers are configured in a single OSPF area with the same priority value and no loopback interfaces are set, the routers will determine the router ID based on the highest IP address among the active interfaces. 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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  • 14. 

    14. Refer to the exhibit. Routers R1 and R2 are directly connected via their serial interfaces and are both running the EIGRP routing protocol. R1 and R2 can ping the directly connected serial interface of their neighbor, but they cannot form an EIGRP neighbor adjacency.

    • A.

      Enable the serial interfaces of both routers.

    • B.

      Configure EIGRP to send periodic updates.

    • C.

      Configure the same hello interval between the routers.

    • D.

      Configure both routers with the same EIGRP process ID.

    Correct Answer(s)
    A. Enable the serial interfaces of both routers.
    D. Configure both routers with the same EIGRP process ID.
    Explanation
    The correct answer is to enable the serial interfaces of both routers and configure both routers with the same EIGRP process ID. Enabling the serial interfaces ensures that the physical connection between the routers is active and functioning properly. Configuring both routers with the same EIGRP process ID allows them to recognize each other as part of the same EIGRP network and form a neighbor adjacency. The other options, such as sending periodic updates and configuring the same hello interval, are not directly related to the issue of forming a neighbor adjacency.

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  • 15. 

    15. Refer to the exhibit. The interfaces of all routers are configured for OSPF area 0. R3 can ping R1, but the two routers are unable to establish a neighbor adjacency. What should the network administrator do to troubleshoot this problem?

    • A.

      Check if the interfaces of the routers are enabled.

    • B.

      Check the hello and dead intervals between the routers.

    • C.

      Check the process ID of both routers.

    • D.

      Check if CDP is enabled on all the routers.

    Correct Answer
    B. Check the hello and dead intervals between the routers.
    Explanation
    To troubleshoot the problem of R3 and R1 being unable to establish a neighbor adjacency, the network administrator should check the hello and dead intervals between the routers. The hello interval is the time interval between OSPF hello packets, and the dead interval is the time interval after which a router declares a neighbor as unreachable. If the hello and dead intervals are not properly configured or do not match on both routers, they will not be able to establish a neighbor adjacency. Therefore, checking and adjusting the hello and dead intervals can help resolve the issue.

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  • 16. 

    16. 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?

    • A.

      Configure the router ID on both routers.

    • B.

      Configure the R2 router interfaces for area 0.

    • C.

      Configure a loopback interface on both routers.

    • D.

      Configure the proper subnet masks on the router interfaces.

    Correct Answer
    B. Configure the R2 router interfaces for area 0.
    Explanation
    The problem can be resolved by configuring the R2 router interfaces for area 0. This is because area 0 is the backbone area in OSPF, and all routers within the OSPF domain must be connected to area 0 in order to establish proper communication. By configuring the R2 router interfaces for area 0, the hosts connected to R2 will be able to communicate with the hosts connected to R1.

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  • 17. 

    17. Refer to the exhibit. The command ip route 0.0.0.0 0.0.0.0 S0/0/0 is run on router R2. What are the two results of this command? (Choose two.)

    • A.

      A static route will be updated in the routing table.

    • B.

      The traffic from the Internet will be directed to R2.

    • C.

      The traffic from the source network 172.16.0.0/22 will be blocked.

    • D.

      The route will be specified as the default route for all networks not defined in the routing table.

    • E.

      All the broadcasts will be forwarded via the S0/0/0 interface of R2.

    Correct Answer(s)
    A. A static route will be updated in the routing table.
    D. The route will be specified as the default route for all networks not defined in the routing table.
    Explanation
    The command "ip route 0.0.0.0 0.0.0.0 S0/0/0" on router R2 will have two results. First, a static route will be added to the routing table. This means that any traffic that matches the destination IP address of 0.0.0.0 (which represents all possible IP addresses) will be directed to the S0/0/0 interface. Secondly, this route will be specified as the default route for all networks that are not defined in the routing table. This means that if there is no specific route for a particular network, the default route will be used and the traffic will be sent to the S0/0/0 interface.

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  • 18. 

    18. Refer to the exhibit. All routers are properly configured with default configurations and are running the OSPF routing protocol. The network is fully converged. A host on the 192.168.3.0/24 network is communicating with a host on the 192.168.2.0/24 network.Which path will be used to transmit the data?

    • A.

      The data will be transmitted via R3-R2.

    • B.

      The data will be transmitted via R3-R1-R2.

    • C.

      The traffic will be load-balanced between two paths — one via R3-R2, and the other via R3-R1-R2.

    • D.

      The data will be transmitted via R3-R2, and the other path via R3-R1-R2 will be retained as the backup path.

    Correct Answer
    B. The data will be transmitted via R3-R1-R2.
    Explanation
    The data will be transmitted via R3-R1-R2 because in OSPF, the path with the lowest cost is chosen as the best path. In this case, the cost between R3-R1-R2 is lower than the cost between R3-R2. Therefore, the data will be transmitted via R3-R1-R2.

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  • 19. 

    19. Refer to the exhibit. What is the meaning of the highlighted value 120?

    • A.

      It is the metric that is calculated by the routing protocol.

    • B.

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

    • C.

      It is the administrative distance of the routing protocol.

    • D.

      It is the hold-down time, measured in seconds, before the next update.

    Correct Answer
    C. It is the administrative distance of the routing protocol.
    Explanation
    The highlighted value 120 represents the administrative distance of the routing protocol. Administrative distance is a value assigned to different routing protocols to determine their trustworthiness or preference. When multiple routing protocols are used, the one with the lowest administrative distance is chosen as the preferred route. In this case, the routing protocol with an administrative distance of 120 would be preferred over others with higher administrative distances.

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  • 20. 

    20. In a complex lab test environment, a router has discovered four paths to 192.168.1.0/24 via the use of the RIP routing process. Which route will be installed in the routing table after the discovery of all four paths?

    • A.

      R 192.168.1.0/24 [120/3] via 192.168.110.1, 00:00:17, Serial0/1/0

    • B.

      R 192.168.1.0/24 [120/2] via 192.168.200.1, 00:00:17, Serial0/0/0

    • C.

      R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1

    • D.

      R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial0/1/1

    Correct Answer
    C. R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1
    Explanation
    The route with the lowest administrative distance will be installed in the routing table. In this case, all four routes have the same administrative distance of 120. Therefore, the route with the lowest metric value will be installed. The metric value represents the cost or distance to reach the destination network. Among the given routes, the route with the lowest metric value is [120/1]. This means that it has a metric of 1, indicating the shortest path to reach the 192.168.1.0/24 network. Therefore, the route "R 192.168.1.0/24 [120/1] via 192.168.100.1, 00:00:17, Serial0/0/1" will be installed in the routing table.

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  • 21. 

    21. Refer to the exhibit. PC1 is unable to access the Internet. What is the cause of the problem?

    • A.

      An incorrect IP address is configured between the two routers.

    • B.

      No static route is configured on Router2.

    • C.

      A routing loop has occurred.

    • D.

      No routing protocol is configured on either of the two routers.

    Correct Answer
    C. A routing loop has occurred.
    Explanation
    A routing loop occurs when there are multiple paths to reach a destination and the routers keep forwarding the packets in a loop without reaching the destination. This can cause network congestion and prevent PC1 from accessing the Internet.

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  • 22. 

    22. How does route poisoning prevent routing loops?

    • A.

      New routing updates are ignored until the network has converged.

    • B.

      Failed routes are advertised with a metric of infinity.

    • C.

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

    • D.

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

    Correct Answer
    B. Failed routes are advertised with a metric of infinity.
    Explanation
    Failed routes are advertised with a metric of infinity. This prevents routing loops by indicating that the route is unreachable and should not be used for forwarding packets. When a route fails, it is assigned a metric value of infinity, which is typically represented as a very high number. This ensures that routers will not select the failed route as the best path for forwarding traffic, preventing loops from occurring.

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  • 23. 

    23. Which statement is true about the metrics used by routing protocols?

    • A.

      A metric is a value used by a particular routing protocol to compare paths to remote networks.

    • B.

      A common metric is used by all routing protocols.

    • C.

      The metric with the highest value is installed in the routing table.

    • D.

      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
    A metric is a value used by a particular routing protocol to compare paths to remote networks. This means that routing protocols use metrics to determine the best path to send data to a remote network. Different routing protocols may use different metrics, such as hop count, bandwidth, delay, or reliability, to make this determination. The metric with the lowest value is typically chosen as the best path and installed in the routing table.

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  • 24. 

    24. Which statement correctly describes a feature of RIP?

    • A.

      RIP is a link-state routing protocol.

    • B.

      RIP uses only one metric—hop count— for path selection.

    • C.

      Advertised routes with hop counts greater than 10 are unreachable.

    • D.

      Messages are broadcast every 10 seconds.

    Correct Answer
    B. RIP uses only one metric—hop count— for path selection.
    Explanation
    RIP, or Routing Information Protocol, is a distance-vector routing protocol that uses the hop count as its sole metric for path selection. This means that when choosing a route, RIP only considers the number of routers or hops that need to be traversed to reach the destination. Other factors such as bandwidth or delay are not taken into account. Therefore, the statement "RIP uses only one metric—hop count— for path selection" accurately describes a feature of RIP.

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  • 25. 

    25. Refer to the exhibit. OSPF is used for the routing protocol and all interfaces are configured with the correct IP addresses and subnet masks. During testing, it is found that router R1 is unable to form an adjacency with R2. What is the cause of this problem?

    • A.

      Both routers have been configured with incorrect router IDs.

    • B.

      Both routers have been configured in different OSPF areas.

    • C.

      Both routers have been configured with an incorrect network type.

    • D.

      Both routers have been configured with different hello and dead intervals.

    Correct Answer
    D. Both routers have been configured with different hello and dead intervals.
    Explanation
    The cause of the problem is that both routers have been configured with different hello and dead intervals. OSPF uses hello packets to establish and maintain neighbor relationships between routers. The hello interval is the time between sending hello packets, and the dead interval is the time after which a neighbor is considered unreachable if no hello packets are received. If the hello and dead intervals are not the same on both routers, they will not be able to form an adjacency.

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  • 26. 

    26. 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?

    • A.

      Hub

    • B.

      Router

    • C.

      Access point

    • D.

      Ethernet switch

    Correct Answer
    B. Router
    Explanation
    A router is required to connect the two separate networks and add a common connection to the Internet that can be shared. A router is a networking device that forwards data packets between different networks. It determines the best path for data to travel and can connect multiple networks together. In this scenario, the router will connect the two separate networks in the building and allow them to access the Internet through a common connection.

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  • 27. 

    27. Which network and mask combination requires the use of a classless addressing solution?

    • A.

      10.32.0.0/11

    • B.

      172.16.0.0/12

    • C.

      192.168.0.0/24

    • D.

      192.168.128.32/27

    Correct Answer
    B. 172.16.0.0/12
    Explanation
    The network and mask combination 172.16.0.0/12 requires the use of a classless addressing solution because the /12 subnet mask allows for a larger number of host addresses within the network compared to a traditional classful network. This indicates that the network is being subnetted, which is a characteristic of classless addressing.

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  • 28. 

    28. A company is using static routes that are configured with an administrative distance of “1” on all routers in the network. The network administrator decides to introduce a dynamic routing protocol to reduce the manual configurations for the static routes. Which option identifies the correct procedure for the dynamic routing to take place in the network?

    • A.

      The static routes and the dynamic routes will have the traffic alternate between them.

    • B.

      The static routes will be automatically removed once the dynamic routing is configured.

    • C.

      The static routes will be automatically updated with the next hop IP address once the dynamic routing is configured.

    • D.

      The static routes must be manually removed from all routers in order for the dynamic routes to be installed in the routing table.

    Correct Answer
    D. The static routes must be manually removed from all routers in order for the dynamic routes to be installed in the routing table.
    Explanation
    When a dynamic routing protocol is introduced in a network with existing static routes, the static routes must be manually removed from all routers. This is because static routes have a lower administrative distance (AD) value compared to dynamic routes. The AD determines the trustworthiness of a route, with lower values being more trusted. So, if both static and dynamic routes exist for the same destination, the static route will be preferred and the dynamic route will not be installed in the routing table. Therefore, to allow the dynamic routes to be installed and used, the static routes must be removed manually.

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  • 29. 

    29. Refer 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?

    • A.

      The login command was not entered on the console line.

    • B.

      The enable password should be an enable secret password.

    • C.

      No username and password combination has been configured.

    • D.

      Console connections cannot be configured to require users to provide passwords.

    Correct Answer
    A. The login command was not entered on the console line.
    Explanation
    Users can establish a console connection to this router without entering a password because the login command was not entered on the console line. This means that the router is not configured to prompt for a password when establishing a console connection.

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  • 30. 

    30. Refer to the exhibit. When a static IP address is being configured on the host, what address should be used for the default gateway?

    • A.

      10.1.1.1

    • B.

      10.1.1.2

    • C.

      172.16.1.1

    • D.

      192.168.1.1

    Correct Answer
    D. 192.168.1.1
    Explanation
    The default gateway is the IP address of the router that connects the host to other networks. In this case, the correct answer is 192.168.1.1 because it is the only IP address in the given options that falls within the same network as the host's IP address.

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  • 31. 

    31. Refer 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?

    Correct Answer
    D.
  • 32. 

    32.  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.

      A, B, C, F

    • B.

      A, B, C, E, F

    • C.

      A, D, G, E, F

    • D.

      A, D, G, H, F

    Correct Answer
    D. A, D, G, H, F
    Explanation
    If the T1 link between router A and router E fails, the packet from router A will take the path A, D, G, H, F to reach the LAN attached to router F. This is because router A will first send the packet to router D, which is directly connected to router A. From router D, the packet will be sent to router G, which is the next hop in the OSPF routing table. From router G, the packet will be sent to router H, which is the next hop in the OSPF routing table. Finally, the packet will reach router F, which is the destination router for the LAN attached to router F.

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  • 33. 

    33. Which candidate route has the longest match for a packet with a destination address of 10.30.16.48?

    • A.

      10.30.0.0/16

    • B.

      10.30.15.0/23

    • C.

      10.30.16.0/24

    • D.

      10.30.16.32/27

    • E.

      10.30.16.32/30

    Correct Answer
    D. 10.30.16.32/27
    Explanation
    The candidate route with the longest match for a packet with a destination address of 10.30.16.48 is 10.30.16.32/27. This is because the subnet mask of /27 allows for a larger range of IP addresses to match compared to the other candidate routes. The other routes have subnet masks that are smaller, meaning they have a narrower range of IP addresses that can match the destination address.

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  • 34. 

    34. Refer to the exhibit. The network is configured with RIPv2. However, network administrators notice that communication cannot be successfully completed from one LAN to another. A network administrator issues the show ip route command on the HQ router. Based on the output, what should be done to correct the problem?

    • A.

      Disable the load balancing feature of RIPv2.

    • B.

      Issue the no auto-summary command for RIPv2.

    • C.

      Replace RIPv2 with EIGRP which supports VLSM.

    • D.

      Make sure that the network statements include the correct subnet mask.

    Correct Answer
    B. Issue the no auto-summary command for RIPv2.
    Explanation
    Based on the output of the "show ip route" command, the network statements in RIPv2 are being summarized automatically. This means that the router is summarizing the subnets within the network, which can cause communication issues between LANs. By issuing the "no auto-summary" command for RIPv2, the automatic summarization feature will be disabled, allowing for more specific routing information to be exchanged between the routers. This will help in resolving the communication problem between the LANs.

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  • 35. 

    35. Which multicast address does EIGRP use to send hello and updates packets?

    • A.

      224.0.0.5

    • B.

      224.0.0.6

    • C.

      224.0.0.9

    • D.

      224.0.0.10

    Correct Answer
    D. 224.0.0.10
    Explanation
    EIGRP uses the multicast address 224.0.0.10 to send hello and update packets. Multicast addresses are used to send packets to a group of devices instead of sending them individually. In the case of EIGRP, this multicast address is used to send routing information to all routers that are part of the EIGRP network. By using multicast, EIGRP can efficiently distribute routing updates to all routers in the network.

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  • 36. 

    36. Refer to the exhibit. Why is the state of the serial0/0/0 interface administratively down?

    • A.

      An IP address has not been configured on the interface.

    • B.

      The WIC was installed into the incorrect slot on the router.

    • C.

      The default encapsulation on the interface has been modified.

    • D.

      The no shutdown command has not been executed on the interface.

    Correct Answer
    D. The no shutdown command has not been executed on the interface.
    Explanation
    The state of the serial0/0/0 interface is administratively down because the "no shutdown" command has not been executed on the interface. This command is used to enable the interface and bring it up. Without executing this command, the interface remains administratively down and cannot transmit or receive data.

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  • 37. 

    37. Refer to the exhibit. How was the OSPF default gateway entry for R2 determined?

    • A.

      Default routes are automatically injected by OSPF into all advertisements

    • B.

      A static default gateway route is defined in the configuration of R2.

    • C.

      The default-information originate command is applied on R1.

    • D.

      The ISP defines the gateway of last resort and automatically passes it to R1 and R2.

    • E.

      The ip default-gateway command is applied on R2.

    Correct Answer
    C. The default-information originate command is applied on R1.
    Explanation
    The OSPF default gateway entry for R2 was determined by the default-information originate command applied on R1.

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  • 38. 

    38. Refer to the exhibit. RIPv1 has been properly configured on all routers in the network. However, users on LAN2 have intermittent connectivity with the users on LAN1 and LAN3. What is the cause of the problem?

    • A.

      Both LAN networks are separated from router R2 with a variably subnetted Class C network 209.165.200.0/30.

    • B.

      Neither router R1 nor router R3 has a static route configured that points to the variably subnetted 172.16.0.0/24 networks.

    • C.

      Both routers R1 and R3 are sending the summarized 172.16.0.0/16 network to R2 in their RIPv1 routing updates.

    • D.

      Both networks 172.16.1.0/24 and 172.16.100.0/24 are configured with a subnet mask different from the default classful mask.

    Correct Answer
    C. Both routers R1 and R3 are sending the summarized 172.16.0.0/16 network to R2 in their RIPv1 routing updates.
    Explanation
    The problem is caused by both routers R1 and R3 sending the summarized 172.16.0.0/16 network to R2 in their RIPv1 routing updates. This means that R2 is receiving conflicting information about the subnets within the 172.16.0.0/16 network. As a result, R2 may not have the correct routing information for forwarding traffic between LAN2 and the other LANs. This can lead to intermittent connectivity issues for users on LAN2.

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  • 39. 

    39. Which default EIGRP configuration must be modified to allow an EIGRP router to advertise subnets that are configured with VLSM?

    • A.

      Split horizon

    • B.

      Metric K values

    • C.

      Autosummarization

    • D.

      Hello and dead intervals

    Correct Answer
    C. Autosummarization
    Explanation
    Autosummarization must be modified to allow an EIGRP router to advertise subnets that are configured with VLSM. Autosummarization is a feature in EIGRP that automatically summarizes network addresses at major network boundaries. This can cause issues when using VLSM, as it can result in incorrect routing information being advertised. By disabling autosummarization, the EIGRP router will advertise the specific subnets configured with VLSM, ensuring accurate routing information is propagated.

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  • 40. 

    40. What is a successor for a destination network in an EIGRP network?

    • A.

      The next hop on a backup route with the largest feasible distance to the destination

    • B.

      The next hop on a backup route with the smallest feasible distance to the destination

    • C.

      The next hop on the primary route with the largest feasible distance to the destination

    • D.

      The next hop on the primary route with the smallest feasible distance to the destination

    Correct Answer
    D. The next hop on the primary route with the smallest feasible distance to the destination
    Explanation
    A successor for a destination network in an EIGRP network refers to the next hop on the primary route with the smallest feasible distance to the destination. This means that the successor is the best path to reach the destination network, as it has the lowest metric or cost compared to other routes.

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  • 41. 

    41. Refer 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?

    • A.

      0.0.0.0/0

    • B.

      172.16.0.0/16

    • C.

      172.16.1.0/24

    • D.

      172.16.3.0/30

    Correct Answer
    B. 172.16.0.0/16
    Explanation
    If manual EIGRP summarization is disabled on the Serial0/0/0 interface of Router3, the route 172.16.0.0/16 will be removed from the routing table.

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  • 42. 

    42. Which port can be used for initial router configuration?

    • A.

      AUX

    • B.

      Vty 0

    • C.

      S0/0/0

    • D.

      Console

    Correct Answer
    D. Console
    Explanation
    The console port can be used for initial router configuration. This port allows direct access to the router's command-line interface (CLI) using a console cable. By connecting a computer or terminal to the console port, users can configure the router's settings, such as IP addresses, passwords, and routing protocols, before enabling remote access through other ports.

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  • 43. 

    43. Which two link-state routing protocol challenges does OSPF resolve through the election of a DR? (Choose two.)

    • A.

      The extensive flooding of LSAs throughout the OSPF area

    • B.

      the excessive adjacencies when the number of routers increases

    • C.

      The requirement for link-state database updates to be propagated between OSPF areas

    • D.

      The heavy CPU load that is imposed because each router must compute shortest paths by using the SPF algorithm

    • E.

      The requirement for each router to build a topological database of the internetwork to determine the shortest paths between networks

    Correct Answer(s)
    A. The extensive flooding of LSAs throughout the OSPF area
    B. the excessive adjacencies when the number of routers increases
    Explanation
    OSPF resolves the challenge of extensive flooding of LSAs throughout the OSPF area by electing a Designated Router (DR). The DR is responsible for receiving LSAs from other routers and flooding them throughout the OSPF area, reducing the amount of flooding that needs to be done by each individual router. Additionally, OSPF resolves the challenge of excessive adjacencies when the number of routers increases by electing a DR. The DR acts as a hub for adjacencies, reducing the number of adjacencies that need to be formed between routers, which helps to improve scalability and reduce the complexity of the network.

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  • 44. 

    44. A routing table shows an EIGRP route to 192.168.1.0/24 with a metric of 301440. What other term also describes this EIGRP metric value?

    • A.

      Feasible distance

    • B.

      Reported distance

    • C.

      Feasible successor

    • D.

      Feasibility condition

    Correct Answer
    A. Feasible distance
    Explanation
    The term that also describes the EIGRP metric value of 301440 is the feasible distance. The feasible distance is the metric value of the best path to a destination network. It represents the total metric of the path from the local router to the destination network.

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  • 45. 

    45. Refer to the exhibit. The network administrator has run the following command on R1. R1(config)# ip route 192.168.2.0 255.255.255.0 172.16.1.2 What is the result of running this command?

    • A.

      Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.

    • B.

      This route is automatically propagated throughout the entire network.

    • C.

      Traffic for all networks is forwarded to 172.16.1.2.

    • D.

      The command invokes a dynamic routing protocol for 192.168.2.0.

    Correct Answer
    A. Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.
    Explanation
    The command "ip route 192.168.2.0 255.255.255.0 172.16.1.2" on R1 configures a static route. It specifies that any traffic destined for the network 192.168.2.0 with a subnet mask of 255.255.255.0 should be forwarded to the next-hop IP address 172.16.1.2. Therefore, the result of running this command is that traffic for network 192.168.2.0 will be forwarded to 172.16.1.2.

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  • 46. 

    46. Refer to the exhibit. What will happen if interface Serial0/0/1 goes down on Router1?

    • A.

      The Dijkstra algorithm will calculate the feasible successor.

    • B.

      DUAL will query neighbors for a route to network 192.168.1.0.

    • C.

      Neighbor 172.16.3.2 will be promoted to the feasible successor.

    • D.

      Traffic destined to the 192.168.1.0 network will be dropped immediately due to lack of a feasible successor.

    Correct Answer
    B. DUAL will query neighbors for a route to network 192.168.1.0.
    Explanation
    If interface Serial0/0/1 goes down on Router1, DUAL (Diffusing Update Algorithm) will query neighbors for a route to network 192.168.1.0. This is because DUAL is the algorithm used by Cisco routers to calculate the best path to a destination network, and when a link failure occurs, it will query neighboring routers to find an alternative path. In this case, it will query neighbors to find a route to the network 192.168.1.0.

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  • 47. 

    47. 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?

    • A.

      Cisco001

    • B.

      Cisco123

    • C.

      Cisco789

    • D.

      Cisco901

    Correct Answer
    C. Cisco789
    Explanation
    The administrator should enter the password "Cisco789" at the R1> prompt to access the privileged EXEC mode.

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  • 48. 

    48. Refer to the exhibit. Which option will provide the configuration that is needed for router R1 to dynamically learn routes to the 192.168.100.16/28, 192.168.100.32/28, and 192.168.100.48/28 subnetworks?

    • A.

      With static routes

    • B.

      With a routed protocol

    • C.

      With a routing protocol

    • D.

      With directly connected routes

    Correct Answer
    C. With a routing protocol
    Explanation
    The configuration needed for router R1 to dynamically learn routes to the specified subnetworks is to use a routing protocol. A routing protocol allows routers to exchange information about networks and dynamically learn routes to reach those networks. This enables routers to make informed decisions about the best path to forward packets. By using a routing protocol, R1 can receive updates from neighboring routers and learn the routes to the 192.168.100.16/28, 192.168.100.32/28, and 192.168.100.48/28 subnetworks.

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  • 49. 

    49. Refer to the exhibit. What will happen when the router reloads?

    • A.

      It will boot into ROMMON mode.

    • B.

      It will ignore the start-up configuration file.

    • C.

      It will look for the start-up configuration file on the TFTP server.

    • D.

      It will attempt to load the start-up configuration file that is stored in NVRAM.

    Correct Answer
    D. It will attempt to load the start-up configuration file that is stored in NVRAM.
    Explanation
    When the router reloads, it will attempt to load the start-up configuration file that is stored in NVRAM. This means that the router will try to load the configuration that was saved to the non-volatile RAM (NVRAM) before the reload. This allows the router to maintain its previous configuration and settings after the reboot.

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  • 50. 

    50. On a router, which actions can be performed in user mode?

    • A.

      Perform password recovery

    • B.

      Make global configuration changes

    • C.

      View status of various router functions

    • D.

      Make changes to a specified interface

    Correct Answer
    C. View status of various router functions
    Explanation
    In user mode on a router, one can only view the status of various router functions. User mode is a limited mode that allows users to access basic information about the router, such as interface status, routing table, and system information. It does not provide the ability to make any configuration changes or perform advanced actions like password recovery or making global configuration changes.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 08, 2013
    Quiz Created by
    Naturiom
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