CCNA 2 (B)

1. Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational?

Switch the cable with a known working cable.

Issue the no shutdown command on the interface.

Configure the interface as a loopback interface.

Set the encapsulation for the interface.

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

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

Submit

3. 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?

Check if the interfaces of the routers are enabled.

Check the hello and dead intervals between the routers.

Check the process ID of both routers.

Check if CDP is enabled on all the routers.

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

R1 is originating the route 172.30.200.32/28.

Automatic summarization is disabled.

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

A classful routing protocol is being used.

5. 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.

Submit

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

Router1

Router2

Router3

Router4

7. Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command?

This route is automatically propagated throughout the network.

The traffic for network 172.16.1.0 is forwarded to network 192.168.2.0.

A static route is established.

The traffic for all Class C networks is forwarded to 172.16.1.2.

8. What are two functions of a router? (Choose two.)

It connects multiple IP networks.

It controls the flow of data via the use of Layer 2 addresses.

It determines the best path to send packets.

It manages the VLAN database.

It increases the size of the broadcast domain.

Submit

9. Refer to the exhibit. A network administrator has configured OSPF using the following command: network 192.168.1.32 0.0.0.31 area 0 Which router interface will participate in OSPF?

FastEthernet 0/0

FastEthernet 0/1

Serial 0/0/0

Serial 0/0/1

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

Traffic for network 192.168.2.0 is forwarded to 172.16.1.2.

This route is automatically propagated throughout the entire network.

Traffic for all networks is forwarded to 172.16.1.2.

The command invokes a dynamic routing protocol for 192.168.2.0.

11. 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?

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

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

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

R 192.168.1.0/24 [120/4] via 192.168.101.1, 00:00:17, Serial 0/1/1

12. Refer to the exhibit. How many routes are child routes?

1

3

4

6

13. Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)

The same process ID

The same area ID

Network addresses and wildcard masks

The same router ID

The same loop back address

Submit

14. Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)

A CSU/DSU device

A modem

An Ethernet switch

A hub

A bridge

Submit

15. Refer to the exhibit. Host A is unable to access the Internet, and troubleshooting has revealed that this is due to an addressing problem. What is incorrectly configured in this network?

The IP address of the Fa 0/0 interface of R1

The subnet mask of the S 0/0/0 interface of R1

The IP address of the S 0/0/0 interface of R1

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

16. Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?

RIPv1

RIPv2

OSPF

EIGRP

17. Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.)

The router modifies the TTL field, decrementing it by one.

The router changes the source IP to the IP of the exit interface.

The router maintains the same source and destination IP.

The router changes the source physical address to the physical address of the exit interface.

The router changes the destination IP to the IP of the exit interface.

Submit

18. 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

19. 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.

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

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

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

It is the administrative distance of the routing protocol.

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

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

10.0.0.0/8

64.100.0.0/16

128.107.0.0/16

192.168.1.0/24

192.168.2.0/24

Submit

22. Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?

R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 0

R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config)# router ospf 2R2(config-router)# network 10.1.1.0 0.0.0.3 area 0

R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.1.1.0 0.0.0.3 area 1

R2(config)# router ospf 1R2(config-router)# network 192.168.2.0 0.0.0.255 area 0R2(config-router)# network 10.0.0.0 0.0.0.3 area 1

23. Which mechanism helps to avoid routing loops by advertising a metric of infinity?

Route poisoning

Split horizon

Hold-down timer

Triggered updates

24. Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes?

The Cisco123 password only

The Cisco789 password only

The Cisco001 password only

The Cisco001 password and the Cisco789 passwords

The Cisco001 password and the Cisco123 passwords

25. Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?

It will forward the packet via the Serial0/0/1 interface.

It will forward the packet via the FastEthernet0/0 interface.

It will forward the packet via the Serial0/0/0 interface.

It will drop the packet.

26. Refer to the exhibit. All routers are configured to run RIPv1 and are fully converged. Which routing updates will be received by R3?

Updates for 192.168.1.0/24 and 192.168.2.0/24

Updates for 172.16.2.0/24 and 172.16.3.0/24

Updates for 172.16.1.0/24, 172.16.2.0/24 and 172.16.3.0/24

Updates for 172.16.0.0/16

27. 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 ripA(config-router)# passive-interface S0/0

B(config)# router ripB(config-router)# network 192.168.25.48B(config-router)# network 192.168.25.64

A(config)# router ripA(config-router)# no network 192.168.25.32

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

A(config)# no router rip

28. 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 static route will be updated in the routing table.

The traffic from the Internet will be directed to R2.

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

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

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

Submit

29. Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1?

172.16.0.0/24

172.16.4.0/22

172.16.4.0/23

172.16.4.0/24

30. Which two situations require the use of a link-state protocol? (Choose two.)

Fast convergence of the network is critical.

The network is very large.

The network administrator has limited knowledge to configure and troubleshoot routing protocols.The network is a flat network.

The capacity of the router is low.

Submit

31. 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, RAM

Flash, NVRAM, TFTP server

ROM, flash, TFTP server

32. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)

The administrative distance of EIGRP has been set to 50.

All routes are stable.

The show ip eigrp topology command has been run on R1.

The serial interface between the two routers is down.

Each route has one feasible successor.

Submit

33. A router that uses the RIP routing protocol has an entry for a network in the routing table. It then receives an update with another entry for the same destination network but with a lower hop count. What action will the router take for this new update?

It will append the update information to the routing table.

It will invalidate the entry for that network in the routing table.

It will replace the existing routing table entry with the new information.

It will ignore the new update.

34. Which two statements are correct about the split horizon with poison reverse method of routing loop prevention? (Choose two.)

It is enabled by default on all Cisco IOS implementations.

It assigns a value that represents an infinite metric to the poisoned route.

It sends back the poisoned route update to the same interface from where it was received.

It instructs routers to hold all changes that might affect routes, for a specified period of time.

It limits the number of hops a packet can traverse through the network before it is discarded.

Submit

35. 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?

The data will be transmitted via R3-R2.

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

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

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

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

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

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

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

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

37. Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem?

There is no gateway of last resort at R1.

The serial interface between the two routers is down.

A default route is not configured on R1.

The static route for 192.168.2.0 is incorrectly configured.

38. Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three routers are displayed. What can be verified from the output?

R1 and R3 are connected to each other via the S0/0/0 interface.

The IP address of the S0/0/0 interface of R1 is 10.1.1.2.

The IP address of the S0/0/1 interface of R2 is 10.3.3.2.

R2 is connected to the S0/0/1 interface of R3.

39. Refer to the exhibit. The networks that are connected to R1 have been summarized for R2 as 192.168.136.0/21. Which packet destination address will R2 forward to R1?

192.168.135.1

192.168.142.1

192.168.144.1

192.168.128.1

40. Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)

The command was run on the router.

ABCD is a non-CISCO device.

Layer 3 connectivity between two devices exists.

ABCD supports routing capability.

ABCD is connected to the Fa0/0 interface of the neighboring device.

Submit

41. Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?

Router A will send the data via the A-D-E path that is listed in the routing table.

Router A will load-balance the traffic between A-B-E and A-C-E.

Router A will determine that all paths have equal metric cost.

Router A will send the data through A-D-E and keep A-B-E and A-C-E as the backup paths.

42. Refer to the exhibit. R1 is running RIP with default parameters. R1 has learned four different paths with the same metrics to network 192.168.6.0. Which path or paths will R1 use to forward a packet that is destined to 192.168.6.10?

The first path that the router learned.

Only the first two of the four paths that the router learned.

The last path that the router learned.

All four paths.

43. Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)

Network 192.168.0.16 can best be reached using FastEthernet0/0.

The AD of EIGRP routes has been manually changed to a value other than the default value.

Router1 is running both the EIGRP and OSPF routing process.

Network 172.17.0.0 can only be reached using a default route.

No default route has been configured.

Submit

44. Refer to the exhibit. Which statement is true about the routing process for this network?

A packet leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260.

The packet leaves interface Fa0/0 of R1 with the source MAC address as 000C.3010.9260.

The no shutdown command needs to run on the Fa0/0 interface of R1.

The Fa0/0 interface of R2 could be configured with the IP address 172.16.4.1/24.

45. Refer to the exhibit. The output of the show ip route command for three routers on a network is displayed. All routers are operational, pings are not blocked on this network, and no default routes are installed. Which two pings will fail? (Choose two.)

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

From R3 to 192.168.1.1

Submit

46. Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with default settings, all routes are advertised on all routers, and the network is fully converged. Which path will the data take to travel between 172.16.1.0/24 and 192.168.100.0/24?

It will travel via A, B, and C.

It will travel via A, F, E, D, and C.

It will travel via A, G, H, and C.

The traffic will be load-balanced on all paths.

47. Refer to the exhibit. All routes are advertised and fully operational on all routers. Which statement is true about the path that the data will take from router A to router B?

If RIPv1 is used with default configurations, the data will be load-balanced on all paths.

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

EIGRP packets are waiting to be sent to the neighbors.

The adjacencies between the routers are yet to be established.

The IP address 192.168.10.10 is configured at serial interface S0/0/1 of router R2.

Router R2 is receiving hello packets from a neighbor with the IP address 192.168.10.10 via the R2 S0/0/1 interface.

49. Which two statements are true about classless routing protocols? (Choose two.)

They can be used for discontiguous subnets.

They can forward supernet routes in routing updates.

They cannot implement classful routes in routing tables.

They use only a hop count metric.

They do not include the subnet mask in routing updates.

Submit

50. Refer to the exhibit. The network administrator has run the show ip protocol command on R1. What can be determined from the exhibited output?

The router is using RIPv2.

The router is not forwarding routing updates.

The router is receiving updates for both versions of RIP.

The FastEthernet0/0 interface is down.

51. Refer to the exhibit. All routers are configured for OSPF area 0. The network administrator requires that R2 always be the DR and maintain adjacency.Which two configurations can achieve this? (Choose two.)

Change the OSPF area of R2 to a higher value.

Change the router ID for R2 by assigning the IP address 172.16.30.5/24 to the Fa0/0 interface.

Change the priority values of the Fa0/0 interfaces of R1 and R3 to 0.

Configure a loopback interface on R2, with an IP address higher than any IPaddress on the other routers.

Configure R1 and R3 with an IP address whose value is higher than that of R2.

Submit

52. A network administrator needs to configure a single router to load-balance the traffic over unequal cost paths. Which routing protocol should the administrator use?

EIGRP

OSPF

RIPv1

RIPv2

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

An incorrect IP address is configured between the two routers.

No static route is configured on Router2.

A routing loop has occurred.

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

54. A router has EIGRP configured as the only routing protocol. In what two ways does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails? (Choose two.)

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 sends queries to adjacent neighbors until the lost route is unknown to the neighbors.

It automatically forwards traffic to a fallback default route until a successor route is found.

Submit

55. Refer to the exhibit. A network administrator successfully pings R1 from R3. Next, the administrator runs the show cdp neighbors command on R3. The output of this command is displayed.What are two reasons for the absence of R1 in the output? (Choose two.)

There is a Layer 2 connectivity problem between R1 and R3.

The Fa0/0 interface of R1 is configured with an incorrect IP address.

The no cdp run command has been run at R1.

The no cdp enable command has been run at Fa0/1 interface of R3.R1 is powered off.

Submit

56. Which two statements are true for OSPF Hello packets? (Choose two.)

They negotiate correct parameters among neighboring interfaces.

They are used for dynamic neighbor discovery.

They use timers to elect the designated router with the fastest link.

They are received from all routers on the network and used to determine the complete network topology.

They are used to maintain neighbor relationships.

Submit

57. Refer to the exhibit. Although both the routers can ping the serial interface of their neighbors, they are unable to ping the Ethernet interfaces of other routers. Which two statements are true for this network? (Choose two.)

The administrative distance has been set to 50 on both routers.

R2 is learning about network 192.168.1.0.

R1 is learning about network 192.168.2.0.

The network 10.1.1.0 command has not been run on both routers.

Autosummarization is enabled on both routers.

Submit

CCNA 2 (B)

1. Refer to the exhibit. A network administrator has run the show interface command. The output of this command is displayed. What is the first step that is required to make this interface operational?

2.

What first name or nickname would you like us to use?

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

3. 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?

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

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

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

7. Refer to the exhibit. A network administrator adds this command to router R1: ip route 192.168.2.0 255.255.255.0 S0/0/0. What is the result of adding this command?

8. What are two functions of a router? (Choose two.)

9. Refer to the exhibit. A network administrator has configured OSPF using the following command: network 192.168.1.32 0.0.0.31 area 0 Which router interface will participate in OSPF?

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

11. 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?

12. Refer to the exhibit. How many routes are child routes?

13. Two routers need to be configured within a single OSPF area. Which two components need to be configured on both routers to achieve this? (Choose two.)

14. Refer to the exhibit. A device is required to complete the connection between router R1 and the WAN. Which two devices can be used for this? (Choose two.)

15. Refer to the exhibit. Host A is unable to access the Internet, and troubleshooting has revealed that this is due to an addressing problem. What is incorrectly configured in this network?

16. Which routing protocol by default uses bandwidth and delay to calculate the metric of a route?

17. Which three statements are true regarding the encapsulation and de-encapsulation of packets when traveling through a router? (Choose three.)

18. 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?

19. 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?

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

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

22. Refer to the exhibit. R1 is configured properly for a single area OSPF, and R2 has been recently installed in the network. Which set of commands is required to configure a single area OSPF for the networks that are connected to R2?

23. Which mechanism helps to avoid routing loops by advertising a metric of infinity?

24. Refer to the exhibit. A network administrator accesses router R1 from the console port to configure a newly connected interface. What passwords will the network administrator need to enter to make the connection and the necessary configuration changes?

25. Refer to the exhibit. The router receives a packet that is destined for 192.168.5.79. How will the router handle this packet?

26. Refer to the exhibit. All routers are configured to run RIPv1 and are fully converged. Which routing updates will be received by R3?

27. 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?

28. 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.)

29. Refer to the exhibit. What summarization should R2 use to advertise its LAN networks to R1?

30. Which two situations require the use of a link-state protocol? (Choose two.)

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

32. Refer to the exhibit. Which two statements are true based on the exhibited output? (Choose two.)

33. A router that uses the RIP routing protocol has an entry for a network in the routing table. It then receives an update with another entry for the same destination network but with a lower hop count. What action will the router take for this new update?

34. Which two statements are correct about the split horizon with poison reverse method of routing loop prevention? (Choose two.)

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

37. Refer to the exhibit. A ping from R1 to 10.1.1.2 is successful, but a ping from R1 to 192.168.2.0 fails. What is the cause of this problem?

38. Refer to the exhibit. The network has three connected routers: R1, R2 and R3. The routes of all three routers are displayed. What can be verified from the output?

39. Refer to the exhibit. The networks that are connected to R1 have been summarized for R2 as 192.168.136.0/21. Which packet destination address will R2 forward to R1?

40. Refer to the exhibit. The show cdp neighbors command was run on one of the devices as shown. Based on this information, which two facts can be determined? (Choose two.)

41. Refer to the exhibit. All the routers are properly configured to use the RIP routing protocol with default settings, and the network is fully converged. Router A is forwarding data to router E. Which statement is true about the routing path?

42. Refer to the exhibit. R1 is running RIP with default parameters. R1 has learned four different paths with the same metrics to network 192.168.6.0. Which path or paths will R1 use to forward a packet that is destined to 192.168.6.10?

43. Refer to the exhibit. Which three statements are true of the routing table for Router1? (Choose three.)

44. Refer to the exhibit. Which statement is true about the routing process for this network?

45. Refer to the exhibit. The output of the show ip route command for three routers on a network is displayed. All routers are operational, pings are not blocked on this network, and no default routes are installed. Which two pings will fail? (Choose two.)

46. Refer to the exhibit. All routers are configured to use the EIGRP routing protocol with default settings, all routes are advertised on all routers, and the network is fully converged. Which path will the data take to travel between 172.16.1.0/24 and 192.168.100.0/24?

47. Refer to the exhibit. All routes are advertised and fully operational on all routers. Which statement is true about the path that the data will take from router A to router B?

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

49. Which two statements are true about classless routing protocols? (Choose two.)

50. Refer to the exhibit. The network administrator has run the show ip protocol command on R1. What can be determined from the exhibited output?

51. Refer to the exhibit. All routers are configured for OSPF area 0. The network administrator requires that R2 always be the DR and maintain adjacency.Which two configurations can achieve this? (Choose two.)

52. A network administrator needs to configure a single router to load-balance the traffic over unequal cost paths. Which routing protocol should the administrator use?

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

54. A router has EIGRP configured as the only routing protocol. In what two ways does EIGRP respond if there is no feasible successor route to a destination network and the successor route fails? (Choose two.)

55. Refer to the exhibit. A network administrator successfully pings R1 from R3. Next, the administrator runs the show cdp neighbors command on R3. The output of this command is displayed.What are two reasons for the absence of R1 in the output? (Choose two.)

56. Which two statements are true for OSPF Hello packets? (Choose two.)

57. Refer to the exhibit. Although both the routers can ping the serial interface of their neighbors, they are unable to ping the Ethernet interfaces of other routers. Which two statements are true for this network? (Choose two.)