CCNA 3 Final Exam V6.0 Answers

1. A small company network has six interconnected Layer 2 switches. Currently all switches are using the default bridge priority value. Which value can be used to configure the bridge priority of one of the switches to ensure that it becomes the root bridge in this design?

61440

34816

28672

1

32768

 

2. Match each OSPF router type description with its name. (Not all options are used.)

- Internal routers:

Routers that have all their interfaces in the same area and have identical LSDBs.

- Area border routers:

All the routers of this type maintain separate LSDBs for each area to which they connect.

- Autonomous System Boundary Routers:

Routers that have at least one interface attached to an external internetwork (another autonomous system), such as a non-OSPF network.

 

3. A network administrator configured an EtherChannel link with three interfaces between two switches. What is the result if one of the three interfaces is down?

One interface becomes an active link for data traffic and the other becomes a backup link.

The EtherChannel fails.

The remaining two interfaces become separate links between the two switches.

The remaining two interfaces continue to load balance traffic.

 

4. A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement describes a feature that is associated with HSRP?

It allows load balancing between a group of redundant routers.

HSRP is nonproprietary.

It uses ICMP messages in order to assign the default gateway to hosts.

HSRP uses active and standby routers.

 

5. Refer to the exhibit. What method can be used to enable an OSPF router to advertise a default route to neighboring OSPF routers?

Use the default-information originate command on ISP.

Use a static route pointing to the ISP and redistribute it.

Use the default-information originate command on R0-A.

Use a static route pointing to the ISP and redistribute it.

Use the redistribute static command on R0-A.

 

6. What eliminates switching loops?

VTP

Time to Live

Spanning Tree Protocol

poison reverse

hold-down timers

 

7. Refer to the exhibit. In this scenario, Area 40 cannot be connected directly to Area 0. Which OSPF network type must be configured in Area 1 to connect these areas?

virtual link

nonbroadcast multiaccess

point-to-point

point-to-multipoint

 

8. What routing protocol can be configured to load balance across paths with unequal metrics through the use of the variance command?

RIPng

OSPFv3

EIGRP

OSPF

 

9. What type of packets are sent when there is a change in the EIGRP topology?

Reply

hello

acknowledge

triggered bounded update

 

10. What information is contained in OSPF type 3 LSAs?

networks learned from other routing protocols

the router ID of an ASBR and the route to reach it

networks reachable in other areas

the router ID of the DR to all routers in the area

 

11. Refer to the exhibit. Which switch will be elected the root bridge and which switch will place a port in blocking mode? (Choose two.)

SW1 will become the root bridge.

SW4 will become the root bridge.

SW3 will become the root bridge.

SW2 will get a port blocked.

SW2 will become the root bridge.

SW4 will get a port blocked.

 

12. Which statement describes the load balancing behavior of EIGRP?

EIGRP for IPv4 supports unequal cost load balancing, but EIGRP for IPv6 does not.

Both EIGRP for IPv4 and EIGRP for IPv6 support unequal cost load balancing.

Neither EIGRP for IPv4 nor EIGRP for IPv6 support unequal cost load balancing.

EIGRP for IPv6 supports unequal cost load balancing, but EIGRP for IPv4 does not.

 

13. What indicates to a link-state router that a neighbor is unreachable?

if the router no longer receives routing updates

if the router receives an LSP with previously learned information

if the router no longer receives hello packets

if the router receives an update with a hop count of 16

 

14. As the network administrator you have been asked to implement EtherChannel on the corporate network. What does this configuration consist of?

grouping multiple physical ports to increase bandwidth between two switches

providing redundant links that dynamically block or forward traffic

grouping two devices to share a virtual IP address

providing redundant devices to allow traffic to flow in the event of device failure

 

15. An EIGRP router loses the route to a network. Its topology table contains two feasible successors to the same network. What action will the router take?

The best alternative backup route is immediately inserted into the routing table.

The DUAL algorithm is recomputed to find an alternate route.

The router uses the default route.

The router will query neighbors for an alternate route.

 

16. What is the term that is used for the area of a network that is affected when a device or network service experiences problems?

broadcast domain

user domain

failure domain

collision domain

 

17. What is the term used to describe a network topology where the subnets from a major classful network address space are separated from each other by addresses from a different major classful network address?

multihomed network

discontiguous network

converged network

data network

 

18. Which two parameters does EIGRP use by default to calculate the best path? (Choose two.)

bandwidth

reliability

delay

MTU

transmit and receive load

 

19. Refer to the exhibit. The configuration shows the commands entered by a network administrator for inter-VLAN routing. However, host PCA cannot communicate with PCB. Which part of the inter-VLAN configuration causes the problem?

port mode on the two switch FastEthernet ports

trunking

VLAN configuration

router port configuration

 

20. Which command will configure an IPv6 default static route?

router(config)# ipv6 route ::/0 s0/0/0

router(config)# ipv6 unicast-routing

router(config)# ipv6 ::/64 s0/0/0

router(config-rtr)# redistribute static

 

21. Which three pieces of information does a link-state routing protocol use initially as link-state information for locally connected links? (Choose three.)

the link next-hop IP address

the type of network link

the cost of that link

the link router interface IP address and subnet mask

the link bandwidth

 

22. A network designer is considering whether to implement a switch block on the company network. What is the primary advantage of deploying a switch block?

This is network application software that prevents the failure of a single network device.

The failure of a switch block will not impact all end users.

This is a security feature that is available on all new Catalyst switches.

A single core router provides all the routing between VLANs.

 

23. When EtherChannel is configured, which mode will force an interface into a port channel without exchanging aggregation protocol packets?

active

desirable

on

auto

 

24. What are two requirements when using out-of-band configuration of a Cisco IOS network device? (Choose two.)

Telnet or SSH access to the device

a terminal emulation client

a connection to an operational network interface on the device

a direct connection to the console or AUX port

HTTP access to the device

 

25. What is the purpose of the vlan.dat file on a switch?

It holds the running configuration.

It holds the saved configuration.

It holds the operating system.

It holds the VLAN database.

 

26. What is the value used to determine which port on a non-root bridge will become a root port in a STP network?

the VTP revision number

the path cost

the highest MAC address of all the ports in the switch

the lowest MAC address of all the ports in the switch

 

27. What are two features of a link-state routing protocol? (Choose two.)

Paths are chosen based on the lowest number of hops to the designated router.

Routers send triggered updates in response to a change.

Routers create a topology of the network by using information from other routers.

Routers send periodic updates only to neighboring routers.

The database information for each router is obtained from the same source.

 

28. What are three features of EIGRP? (Choose three.)

establishes neighbor adjacencies

broadcasts updates to all EIGRP routers

uses the Shortest Path First algorithm

uses the Reliable Transport Protocol

sends full routing table updates periodically

supports equal and unequal cost load balancing

 

29. Refer to the exhibit. The network administrator configures both switches as displayed. However, host C is unable to ping host D and host E is unable to ping host F. What action should the administrator take to enable this communication?

Add the switchport nonegotiate command to the configuration of SW2.

Associate hosts A and B with VLAN 10 instead of VLAN 1.

Remove the native VLAN from the trunk.

Configure either trunk port in the dynamic desirable mode.

Include a router in the topology.

 

30. Refer to the exhibit. A network administrator has configured OFPF in the topology as shown. What is the preferred path to get from the LAN network that is connected to R1 to the LAN network that is connected to R7?

R1-R3-R2-R6-R7

R1-R4-R5-R6-R7

R1-R3-R4-R5-R6-R7

R1-R2-R6-R7

 

31. Match each description to its corresponding LSA type. (Not all options are used.)

Type 1 => generated by all routers and flooded within an area

Type 2 => generated by the DR on a multiaccess segment and flooded within an area

Type 3 => generated by ABRs and sent between areas

Type 4 => generated by ABRs and sent between areas to advertise the location of an ASBR

 

32. Which address is used by an IPv6 EIGRP router as the source for hello messages?

the all-EIGRP-routers multicast address

the 32-bit router ID

the IPv6 global unicast address that is configured on the interface

the interface IPv6 link-local address

 

33. A network administrator is planning to add a new switch to the network. What should the network administrator do to ensure the new switch exchanges VTP information with the other switches in the VTP domain?

Configure all ports on the new switch to access mode.

Associate all ports of the new switch to a VLAN that is not VLAN 1.

Configure the VLANs on the new switch.

Configure the correct VTP domain name and password on the new switch.

 

34. Refer to the exhibit. Which route or routes will be advertised to the router ISP if autosummarization is enabled?

10.0.0.0/8

10.1.0.0/16

10.1.1.0/24

10.1.2.0/24

10.1.3.0/24

10.1.4.0/28

10.1.0.0/28

 

35. In an OSPFv2 configuration, what is the effect of entering the command network 192.168.1.1 0.0.0.0 area 0?

It changes the router ID of the router to 192.168.1.1.

It tells the router which interface to turn on for the OSPF routing process.

It allows all 192.168.1.0 networks to be advertised.

It enables OSPF on all interfaces on the router.

 

36. Refer to the exhibit. R1 and R2 are OSPFv3 neighbors. Which address would R1 use as the next hop for packets that are destined for the Internet?

FE80::21E:BEFF:FEF4:5538

FF02::5

2001:DB8:C5C0:1::2

2001:DB8:ACAD:1::2

 

37. Which configuration changes will increment the configuration revision number on the VTP server?

configuring or deleting a VLAN or creating a VLAN name

configuring or changing the VTP domain name

configuring or changing the VTP password

configuring or changing the VTP version number

configuring trunk links on the VTP server

 

38. A router is participating in an OSPFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OSPF router?

OSPF will remove that neighbor from the router link-state database.

SPF will run and determine which neighbor router is "down".

A new dead interval timer of 4 times the hello interval will start.

OSPF will run a new DR/BDR election.

 

39. When will a router that is running EIGRP put a destination network in the active state?

When there is outgoing traffic toward the destination network

when there is an EIGRP message from the successor of the destination network

when the EIGRP domain is converged

when the connection to the successor of the destination network fails and there is no feasible successor available

 

40. Match the order of precedence to the process logic that an OSPFv3 network router goes through in choosing a router ID. (Not all options are used.)

The router displays a console message to configure the router ID manually. => priority 4

The router uses the highest configured IPv4 address of an active interface. => priority 3

The router uses the highest configured IPv4 address of a loopback interface. => prority 2

The router uses the explicitly configured router ID if any. => priority 1

 

41. What is the function of STP in a scalable network?

It decreases the size of the failure domain to contain the impact of failures.

It protects the edge of the enterprise network from malicious activity.

It disables redundant paths to eliminate Layer 2 loops.

It combines multiple switch trunk links to act as one logical link for increased bandwidth.

 

42. Refer to the exhibit. A network administrator has configured OSPFv2 on the two Cisco routers as shown. The routers are unable to form a neighbor adjacency. What should be done to fix the problem?

Implement the command network 192.168.2.4 0.0.0.3 area 0 on router R2.

Implement the command network 192.168.3.0 0.0.0.255 area 0 on router R2.

Implement the command no passive-interface Serial0/1.

Change the router-id of router R2 to 2.2.2.2.

 

43. Refer to the exhibit. For the given topology, what are three results of the OSPF DR and BDR elections ?(Choose three.)

R5 is BDR for segment B.

R1 is BDR for segment A.

R3 is DR for segment A.

R2 is DR for segment A.

R4 is DR for segment B.

R3 is DR for segment B.

 

44. What are three characteristics of VTP? (Choose three.)

In the default VTP mode, VLANs can be created and modified on a switch.

VTP-enabled switches exchange three types of advertisements: summary routes, subnet advertisements, and advertisement requests from transparent bridges.

VTP updates are exchanged across trunk links only.

The switch configuration must be saved and the switch reloaded to reset a configuration revision number.

Switches in different VTP domains can exchange updates if revision numbers are the same.

Switches in VTP server mode store VLANs in the vlan.dat database.

 

45. What term is used to express the thickness or height of a switch?

rack unit

port density

module size

domain size

 

46. Match the description to the term. (Not all options are used.)

Place the options in the following order:

This is where the details of the neighboring routers can be found. -> adjacency database

This is the algorithm used by OSPF. -> Shortest Path First

All the routers are in the backbone area. -> Single-area OSPF

This is where you can find the topology table. -> link-state database

 

47. A network administrator enters the spanning-tree portfast bpduguard default command. What is the result of this command being issued on a Cisco switch?

Any switch port will be error-disabled if it receives a BPDU.

Any switch port that has been configured with PortFast will be error-disabled if it receives a BPDU.

Any switch port that receives a BPDU will ignore the BPDU message.

Any trunk ports will be allowed to connect to the network immediately, rather than waiting to converge.

 

48. What capability do protocol-dependent modules provide to the EIGRP routing protocol?

route different Layer 3 protocols

load balance between routing protocols

combine routes learned from different protocols into a single routing table

exchange summary routes between areas

 

49. Refer to the exhibit. A company has migrated from single area OSPF to multiarea. However, none of the users from network 192.168.1.0/24 in the new area can be reached by anyone in the Branch1 office. From the output in the exhibit, what is the problem?

The router has not established any adjacencies with other OSPF routers.

The link to the new area is down.

There are no interarea routes in the routing table for network 192.168.1.0.

The OSPF routing process is inactive.

 

50. When are EIGRP update packets sent?

when learned routes age out

only when necessary

every 5 seconds via multicast

every 30 seconds via broadcast

 

51. Refer to the exhibit. A network administrator has configured the OSPF timers to the values that are shown in the graphic. What is the result of having those manually configured timers?

R1 automatically adjusts its own timers to match the R2 timers.

The neighbor adjacency has formed.

The R1 dead timer expires between hello packets from R2.

The hello timer on R2 expires every ten seconds.

 

52. Which command will start the process to bundle two physical interfaces to create an EtherChannel group via LACP?

channel-group 2 mode auto

interface range GigabitEthernet 0/4 – 5

channel-group 1 mode desirable

interface port-channel 2

 

53. Refer to the exhibit.A network administrator is reviewing the configuration of switch S1. Which protocol has been implemented to group multiple physical ports into one logical link?

LACP

PAgP

STP

DTP

 

54. What does the SPF algorithm consider to be the best path to a network?

The path with the smallest delays.

The path with the least number of hops.

The path that includes the fastest cumulative bandwidth links.

The path that includes the fastest single bandwidth link.

 

55. What does the cost of an OSPF link indicate?

A higher cost for an OSPF link indicates a faster path to the destination.

A lower cost indicates a better path to the destination than a higher cost does.

Link cost indicates a proportion of the accumulated value of the route to the destination.

Cost equals bandwidth.

 

56. Which two addresses represent valid destination addresses for an OSPFv3 message? (Choose two.)

FF02::A

FF02::5

224.0.0.5

FE80::42

2001:db8:acad:1::1

 

57. Refer to the exhibit. Which command should be used to configure EIGRP to only advertise the network that is attached to the gigabit Ethernet 0/1 interface?

network 172.16.23.64 0.0.0.127

network 172.16.23.0 255.255.255.192

network 172.16.23.0 255.255.255.128

network 172.16.23.64 0.0.0.63

 

58. Refer to the exhibit. Switch SW-A is to be used as a temporary replacement for another switch in the VTP Student domain. What two pieces of information are indicated from the exhibited output? (Choose two.)

VTP will block frame forwarding on at least one redundant trunk port that is configured on this switch.

VLAN configuration changes made on this switch will be sent to other devices in the VTP domain.

This switch will update its VLAN configuration when VLAN changes are made on a VTP server in the same domain.

The other switches in the domain can be running either VTP version 1 or 2.

There is a risk that the switch may cause incorrect VLAN information to be sent through the domain.

 

59. Which statement describes the autonomous system number used in EIGRP configuration on a Cisco router?

It identifies the ISP that provides the connection to network of the organization.

It carries the geographical information of the organization.

It functions as a process ID in the operation of the router.

It is a globally unique autonomous system number that is assigned by IANA.

 

60. Which three STP states were replaced with the RSTP discarding state? (Choose three.)

forwarding

learning

disabled

blocking

listening