CCNA 2 Final 2012 Exam Answers – V3

1. Refer to the routing table shown in the exhibit. What is the meaning of the highlighted value 192?

It is the value assigned by the Dijkstra algorithm that designates the number of hops in the network.
It is the value used by the DUAL algorithm to determine the bandwidth for the link.
It is the metric, which is cost.
It is the administrative distance.

2. What is the purpose of the TTL field within an IP packet header?

clears an unreachable route from the routing table after the invalid timer expires
prevents regular update messages from inappropriately reinstating a route that may have gone bad
removes an unreachable route from the routing table after the flush timer expires
limits the period of time or number of hops a packet can traverse through the network before it should be discarded
used to mark the route as unreachable in a routing update that is sent to other routers

3. When would the network administrator use the ip bandwidth-percent eigrpas-number percent command?

when there is a low bandwidth connection
when the connection is on a shared medium
when the connection is serial instead of Ethernet
when the link is always busy

4. What is the function of the OSPF LSU packet?

used to confirm receipt of certain types of OSPF packets
used to establish and maintain adjacency with other OSPF routers
used to request more information about any entry in the BDR
used to announce new OSPF information and to reply to certain types of requests

5. 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

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

IGRP
RIPv1
RIPv2
EIGRP

7. 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 EIGRPthe path learned via RIP
the path with the highest metric value
both paths with load balancing

8. 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.

9. Which two locations can be the source of the Cisco IOS that is used by a router during the bootup process? (Choose two.)

flash memory
RAM
NVRAM
TFTP server
configuration register

10. 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 1
R2(config-router)# network 192.168.2.0 0.0.0.255 area 0
R2(config-router)# network 10.1.1.0 0.0.0.3 area 0R2(config)# router ospf 1
R2(config-router)# network 192.168.2.0 0.0.0.255 area 0
R2(config)# router ospf 2
R2(config-router)# network 10.1.1.0 0.0.0.3 area 0
R2(config)# router ospf 1
R2(config-router)# network 192.168.2.0 0.0.0.255 area 0
R2(config-router)# network 10.1.1.0 0.0.0.3 area 1
R2(config)# router ospf 1
R2(config-router)# network 192.168.2.0 0.0.0.255 area 0
R2(config-router)# network 10.0.0.0 0.0.0.3 area 1

11. 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.
What action should be taken to solve this problem?

Enable the serial interfaces of both routers.
Configure EIGRP to send periodic updates.
Configure the same hello interval between the routers.
Configure both routers with the same EIGRP process ID.

12. 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.

13. 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.

14. 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.

15. 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.

16. In a lab test environment, a router has learned about network 172.16.1.0 through four different dynamic routing processes. Which route will be used to reach this network?

D 172.16.1.0/24 [90/2195456] via 192.168.200.1, 00:00:09, Serial0/0/0O 172.16.1.0/24 [110/1012] via 192.168.200.1, 00:00:22, Serial0/0/0
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

17. Which two technologies can be used in distance vector routing protocols to prevent routing loops? (Choose two.)

authentication
link-state advertisements
hold-down timers
Spanning Tree Protocol
split horizon

18. 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

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

3
4
5
7

20. Which statement correctly describes a feature of RIP?

RIP is a link-state routing protocol.
RIP uses only one metric—hop count— for path selection.
Advertised routes with hop counts greater than 10 are unreachable.
Messages are broadcast every 10 seconds.

21. Refer to the exhibit. Which combination of IP address and subnet mask can be used on the serial interface of Router2 in order to put the interface in the same network as the serial interface of Router1?

IP 172.16.0.18, subnet mask 255.255.255.0
IP 172.16.32.15, subnet mask 255.255.255.240
IP 172.16.0.18, subnet mask 255.255.255.252
IP 172.16.32.18, subnet mask 255.255.255.252

22. The command ip route 192.168.2.0 255.255.255.0 172.16.2.2 was entered into the router. After network changes were made, the new next hop for the 192.168.2.0/24 network is 172.16.5.1. What should an administrator do so that the router will use the new next hop to reach the 192.168.2.0 network?

Enter the command clear ip route *.
Lower the administrative distance for the new path to ensure that it is used first.
Negate the original command and enter a new static route with the new next hop.
Nothing. The router will learn of the new next hop and automatically update the route table.

23. 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?

hub
router
access point
Ethernet switch

24. A network administrator must use the subnet 172.16.128.0/18 to create 6 additional subnets each containing up to 2000 hosts for local LANs. Which subnet mask should the administrator use to create the new subnets?

255.255.224.0
255.255.240.0
255.255.248.0
255.255.252.0

25. When connecting two devices, which situation would normally require the use of a crossover cable?

connecting a host to a switch
connecting a switch to a router
connecting a switch to a switch
connecting a host to a router console port

26. Which router mode is accessed by entering the enable command?

user EXEC
privileged EXECglobal configuration
interface configuration

27. 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?

The login command was not entered on the console line.
The enable password should be an enable secret password.
No username and password combination has been configured.
Console connections cannot be configured to require users to provide passwords.

28. 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?

with static routes
with a routed protocol
with a routing protocol
with directly connected routes

29. Refer to the exhibit. The network is configured for RIPv2 routing. What path will a packet from router A take to reach the LAN that is attached to router F if the 56 kb/s link between router A and router E fails?

A, B, C, FA, B, C, E, F
A, D, G, H, F
A, D, G, E, F
A, D, G, E, H, F

30. Refer to the exhibit. Routers R1 and R2 are directly connected through a FastEthernet link but cannot form a neighbor adjacency. What could resolve the problem?

The cost on R1 should be set higher.
The priority on R1 should be set higher.
The OSPF process ID numbers must match.
A backup designated router needs to be added to the network.
The hello and dead timers must be configured with the same values on both routers.

31. Which feature of RIPv2 enables it to function as a classless routing protocol?

Subnet masks are included in routing updates.Routing updates are triggered by topology changes.
Next-hop addresses are included in routing updates.
Multicast addresses are used to send routing updates.

32. Refer to the exhibit. Which solution provides the most efficient use of router resources for forwarding traffic between BR and HQ?

RIP
RIPv2
EIGRP
static routes

33. Refer to the exhibit. A network administrator configures a static route on router R1 to reach the 192.168.1.0/24 network. Which IP address should be used as the next-hop address in the ip route command?

192.168.1.1
192.168.2.1
192.135.250.1
192.135.250.2

34. Refer to the exhibit. Which two interface variables will determine the metric that is used on EIGRP routes? (Choose two.)

load
delayreliability
hop count
bandwidth

35. Which protocol is used by EIGRP to deliver and receive update packets?

FTP
RTP
TCP
TFTP
UDP

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

224.0.0.5
224.0.0.6
224.0.0.9
224.0.0.10

37. What is the key responsibility of the switching function within a router?

to choose the best path based on the lowest path cost
to encapsulate packets in the correct data link frame type
to look up the correct exit interface for the destination IP address
to look up the correct exit interface for the destination MAC address
to resolve the destination IP address into a destination MAC address

38. Refer to the exhibit. If the attached device is configured correctly, what action can be taken to change the state of FastEthernet0/0 to Up Up?

Attach a crossover cable to the interface.
Change the encapsulation on the interface to HDLC.
Issue the no shutdown command for the interface.
Set the clock rate for the interface to 56000.

39. Which two commands can be used to modify the default OSPF metric calculation of a link? (Choose two.)

R1(config-if)# bandwidth
R1(config-if)# ip ospf costR1(config-if)# ip ospf priority
R1(config-if)# ip ospf hello-interval
R1(config-router)# default-information originate

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

Automatic summarization is disabled.
The EIGRP routing protocol is being used.There is one feasible successor in the routing table.
The serial interface S0/0/0 is administratively down.
The router created the route to 172.16.1.0/24 via the S0/0/0 interface.

41. Refer to the exhibit. Two connected routers are unable to establish adjacency. Based on the show ip ospf interface output, what could be the problem?

The dead timers do not match.The routers have not reached full state.
The two routers are in different autonomous systems.
The physical interface between the two routers is down.

42. What is a characteristic of classful routing?

support for VLSM
the use of 48-bit addresses
routing updates do not include a subnet mask
addresses that are typically entered in hexadecimal format

43. Refer to the exhibit. A network administrator is investigating why data packets with destination addresses of 172.16.10.10 and 192.168.10.100 are being dropped instead of being forwarded via the static route as expected. After confirming that the ip classless command has been applied on all routers in the network, what other action should the administrator take to ensure that data packets to these addresses are forwarded via the static route?

Check that all routers are configured with the same autonomous system number.
Issue the no auto-summary command within the EIGRP configuration of all routers.
Issue the no passive-interface command within the EIGRP configuration of all routers.
Configure the static route to point to the next hop address instead of the outbound interface.

44. A router in an EIGRP enterprise network has a default route configured via the interface that connects to the ISP. Which command would the network administrator apply on this router so that other routers in the EIGRP AS 100 network will use this default route?

redistribute static
redistribute eigrp 100
redistribute connected
default-information originate

45. A network administrator configures a new router and saves the configuration. The router is taken to the installation site and installed. On startup, what component will the router search first by default for the saved configuration?

CompactFlash
CPU
boot ROM
flash
NVRAM
UART

46. Refer to the exhibit. A network engineer removes a new router from the shipping container and powers on the router to ensure it passes POST. Which port would the engineer use to perform the initial configuration?

AUX
console
FE0/0
FE0/1

47. Refer to the exhibit. A ping between host A and host B is successful, but pings from host A to operational hosts on the Internet fail. 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 host A.

48. You have been asked to explain converged networks to a trainee. How would you accurately describe a converged network?

A network is converged when all routers have formed an adjacency.
A network is converged immediately after a topology change has occurred.
A network is converged when all routers flush the unreachable networks from their routing tables.
A network is converged after all routers share the same information, calculate best paths, and update their routing tables.

49. A network administrator is troubleshooting a RIPv2 network that is not converging as expected. Which command can the administrator use on each router to view the RIPv2 updates as they are received?

debug ip rip
show ip route
debug ip routing
show ip protocols
show ip interface brief

50. A network administrator is setting up a new router with a device name of Admin, an encrypted password of cangetin, and the IP address 192.168.1.22/29 assigned to the first FastEthernet interface. Which command sequence correctly configures this router?

Router(config)# hostname Admin
Admin(config)# enable secret cangetin
Admin(config)# interface fa0/1
Admin(config-if)#ip address 192.168.1.22 255.255.255.248
Router(config)# hostname Admin
Admin(config)# enable password cangetin
Admin(config)# interface fa0/1
Admin(config-if)# ip address 192.168.1.22 255.255.255.248
Router(config)# hostname Admin
Admin(config)# enable secret cangetin
Admin(config)# interface fa0/0
Admin(config-if)# ip address 192.168.1.22 255.255.255.248
Router(config)# hostname Admin
Admin(config)# enable password cangetin
Admin(config)# interface fa0/0
Admin(config-if)# ip address 192.168.1.22 255.255.255.248