Nokia Virtual Private Routed Networks 4A0-106 Updated Questions

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If you’re looking to take the Nokia Virtual Private Routed Networks 4A0-106 exam, using the updated questions is a smart choice. These 4A0-106 exam updated questions have been designed to reflect the most recent changes to the exam material and have been created by industry experts who know the material inside and out. By using these questions to prepare, you can be sure that you are fully equipped to succeed on the exam and take your career to the next level. Free Nokia Virtual Private Networks 4A0-106 exam updated questions are below.

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1. In a VPRN, which of the following are supported as PE-CE routing methods on the Nokia 7750 SR? (Choose four).

Static

RIP

OSPF

IS-IS

MP-BGP

BGP

2. Which of the following is a characteristic of inter-AS model C VPRN?

A data packet destined to a remote AS is encapsulated with three labels within the originating A

The ASBR redistributes VPN-IPv4 updates to its ASBR eBGP peers.

PE routers in different ASes exchange IPv4 routes directly between each other using eBG

The advertising ASBR assigns a new label to the route before sending it via an MP-eBGP update to its ASBR peer.

3. Click the exhibit.

For the inter-AS model C VPRN, which of the following statements about a data packet sent from CE1 toCE2isTRUE?

PE1 sends the data packet with three labels: the bottom label is a service label, the middle label is a BGP label, and the top label is an LDP label.

ASBR1 sends the data packet with one label: the BGP label.

ASBR1 sends the data packet with one label: the service label.

ASBR2 sends the data packet with three labels: the bottom label is a service label, the middle label is a BGP label, and the top label is an LDP label.

4. For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is a BGP/MPLS VPN Service Provider (SP), which of the following is FALSE?

The customer carrier network can be a pure IP network.

The customer carrier provides Layer 2 and Layer 3 services to its end-customers.

A single CSC VPRN is configured on the network provider to support all services offered by the customer carrier.

In the case where the customer carrier offers VPRN services, the model is referred to as hierarchical VPR

5. Click the exhibit.

For the inter-AS model C VPRN, which router is configured as shown?

PE1

RR1

ASBR1

ASBR2

6. It is required to prepare the provider core for LDP on an Nokia 7750 SR.

Based on the configuration shown below, choose the answer that best describes the given configuration.

This configuration is correct and complete

This configuration is correct except that the system interface must be added

This configuration is correct except that the interfaces facing the CE routers must be added.

MPLS configuration is not required

7. Click the exhibit.

For the Carrier Supporting Carrier (CSC) VPRN, which routes are advertised between CSC-CE1 andCSC-PE1?

VPN-IPv4 routes for all PE system addresses in AS 1000

BGP labeled IPv4 routes for all PE system addresses in AS 1000

VPN-IPv4 routes for all PE system addresses in AS 5000

BGP labeled IPv4 routes for all PE system addresses in AS 5000

8. Click the exhibit.

The policy shown is configured on an Nokia 7750 SR to implement an extranet VPRN between the main sites of two separate VPRNs. Route target "target:65100:2" is used for Customer 1 routes, and route target "target:65100:3" is used for Extranet routes.

How should this policy be applied?

The policy should be applied as an import policy on the PE connected to the main site of Customer 1.

The policy should be applied as an import policy on all the PEs connected to the sites of Customer 1.

The policy should be applied as an export policy on the PE connected to the main site of Customer 1.

The policy should be applied as an export policy on all the PEs connected to the sites of Customer 1.

9. Given the following VPRN topology: The VPRN service 10 is correctly configured and operational with OSPF as the PE to CE routing protocol at both customer sites. The OSPF database on CE-A contains Type 1 LSAs.

These routes will appear as what LSA type on CE-B?

These routes will not appear on CE-B

Type 1 LSAs

Type 3 LSAs

Type 5 LSAs

Type 7 LSAs

10. Which of the following statements are true regarding P devices in an MPLS VPRN? (Choose two.)

Participate in service provider core routing

P devices are not required to be MPLS enabled. MPLS is only required on the PE devices

Run a common routing protocol with the CE router

Must support MP-BGP

Do not have any connections to the CE

Must be aware of the VPRNs

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11. Which of the following is NOT a viable option when implementing inter-AS VPRN?

MP-eBGP exchange of VPN-IPv4 routes between ASBRs residing in different autonomous systems.

MP-eBGP exchange of labeled IPv4 routes between route reflectors residing in different autonomous systems.

A VRF-to-VRF connection at the autonomous system border routers.

MP-eBGP exchange of VPN-IPv4 routes between PEs residing in different autonomous systems.

12. Which method does the Nokia 7750 SR use for the allocation of VPRN labels?

One label per route

One label per next-hop

One label per VRF

One label per prefix

One label per tunnel

13. A customer has two sites connected to PE-1 and a third site dual-homed to PE-2 and PE-3. If BGP is used as the PE-CE protocol, what is the total number of BGP and MP-BGP sessions required on PE-1 for a functional VPRN service? Assume that route reflection is not used.

0 BGP and 2 MP-BGP sessions

2 BGP and 0 MP-BGP sessions

2 BGP and 1 MP-BGP sessions

2 BGP and 2 MP-BGP sessions

1 BGP and 2 MP-BGP sessions

14. When an Nokia 7750 SR receives a BGP update containing an AS-Path loop, what is the default action?

The update is accepted and the route installed in the route table.

The update is accepted but the route will not be installed in the route table

The update is rejected

The peer session is dropped

15. Which of the following devices would typically have VRF instances?

Any CE device

Any PE device

Any P device

Any router in the service provider core

Any customer router

16. You are configuring spoke SDP termination of a VPLS service on a VPRN interface on an Nokia 7750 SR. The spoke SDP is running over a NULL encapsulated network port. The best practice is to set the VPRN interface p-mtu equal to what value over a NULL encapsulated network port.

The SDP path-MTU minus 14

The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP

The configured service-mtu of the VPLS service

The LMTU found in how router ldp bindings on the VPLS side of the spoke SDP minus14

The SDP path-MTU

17. Choose the best answer to describe the result of the configuration of an Nokia 7750 SR shown below?

The PE will install a maximum of 40 prefixes into the customer vrf and generate a log message when 40 routes are received

The PE will install a maximum of 40 prefixes into the customer vrf, and generate a log message both when 30 and 41 routes are received

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and disable learning of new routes at 41

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 10 routes are received and drop the connection at 41

The PE will install a maximum of 40 prefixes into the customer vrf, generate a log message when 4 routes are received and disable learning of new routes at 41

18. What is the purpose of the Route Distinguisher?

It defines the VPN membership

It defines which routes are imported into the vrf

It defines which routes are exported from the vrf

It is used to make IPv4 addresses unique

It is used as the VPN label

19. Which of the following protocols does the Nokia 7750 SR support to signal VPRN service labels?

Targeted-LDP

BGP

MP-BGP

RSVP-TE

20. What operation is performed by a P device on the label signaled by MP-BGP when it receives a labeled packet for a VPRN service?

It will label switch the packet based on this label

It will decrement the TTL and label switch the packet based on this label

It will SWAP the label for a new label and then label switch the packet

The P router does not perform any operation on this label

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21. Click the exhibit.

An extranet VPRN is configured on Nokia 7750 SRs.

On which router(s) should the displayed configuration be applied?

Router R1

Router R2

Routers R1 and R2

Router R3

Router R4

22. Click the exhibit.

For the inter-AS model C VPRN, which of the following is FALSE when an IP packet is sent from 192.1.1.1 to 192.2.1.1?

PE1 pushes three labels on the IP packet: a VPN label, a BGP label, and an LDP transport label.

ASBR1 pops the LDP and BGP labels and swaps the VPN label.

ASBR2 pops the BGP label and pushes an LDP transport label.

PE2 pops two labels and forwards the unlabeled packet to its destination.

23. Where are VPN-IPv4 addresses used in a VPRN?

In the routing updates exchanged from CE to PE

In the routing updates exchanged from PE to PE

In the routing updates exchanged from P to PE

In customer packets as they traverse the provider core

In all route tables of the VPRN control plane

24. Which command is used to generate the output from an Nokia 7750 SR shown below?

Show service 3

Show service id 3

Show service 3 base

Show service id 3 base

Show service 3 detail

Show service id 3 detail

25. Which command is required in the blank line to complete the configuration shown below on an Nokia 7750 SR?

Sap 1/1/1 create

Sap 1/1/1 customer 10 create

No shutdown

Neighbor 192.168.1.2

26. Click the exhibit.

For the PE hub and spoke VPRN, on which PE(s) should the VPRN service command target export target: 65100:1 import target: 65100: 2 " be configured?

PE1

PE2, PE3 and PE4

PE1, PE2, PE3 and PE4

This command is not required for the configuration of this PE hub and spoke VPR

27. Which single command will verify the state of auto-bind, the configured Route Distinguisher and Route Target, in addition to the SAP and SDP bindings for a particular service on an Nokia 7750 SR?

Show service all

Show service id <service-id> detail

Show service id <service-id> base

Show service id <service-id> bindings

Show service sap-using

28. Which of the following is not an available option for Route Distinguisher assignment?

One Route Distinguisher per VRF route

One Route Distinguisher per VRF

One Route Distinguisher per VRF per site

One Route Distinguisher per VPN

29. Which of the following about the control plane in Carrier Supporting Carrier (CSC) VPRN is FALSE?

End-customer routes are populated in the network provider CSC VR

The customer carrier does not learn any network provider internal routes.

The network provider learns customer carrier PE system addresses.

Routes exchanged between the customer carrier and the network provider are labeled.

30. Which of the following statements best describes the output from an Nokia 7750 SR shown below?

This is the base routing table from CE-1

This is the base routing table from PE-1

This is the customer vrf from CE-1

This is the customer vrf from PE-1

This is the customer vrf from PE-2

This is the base routing table from PE-2

This is the base routing table from CE-2

Page 4 of 7

31. The policies shown below from the configuration of an Nokia 7750 SR have been created to implement an Extranet VPRN between the main sites of two separate VPRNs.

How should these policies be applied?

ample Policy should be applied as an export policy on the PE connected to the main site of Customer 1

ample Policy 3 should be applied as an export policy on the PE connected to the main site of Customer 2

ample Policy 3 should be applied as an export policy on both PEs connected to the main site of Customer 1 and the main site of Customer 2

ample Policy should be applied as an export policy on both PEs connected to the main site of Customer 1 and the main site of Customer 2

ample Policy should be applied as an export policy on all PEs connected to sites of Customer 1

32. Which statement about assigning one Route Distinguisher per VPN is TRUE?

This approach is recommended when multiple sites advertise the same prefix.

This approach limits the opportunities for load balancing.

This approach requires additional memory on the PEs to store more routes.

This approach is recommended for extranet VP

33. Which of the following commands may be used on an Nokia 7750 SR to display a network exported locally to BGP on the originating router? (Choose two)

Show router bgp routes

Show router bgp routes prefix <prefix>

Show router bgp routes <prefix> self-originated

Show router bgp routes <prefix> hunt

Show router bgp neighbor <neighbor ip> advertised-routes

34. Click the exhibit.

For the inter-AS model B VPRN, which of the following protocols is used to advertise routes between PE1 and ASBRI?

iBGP

eBGP

MP-iBGP

MP-eBGP

35. When configuring a VPRN service on an Nokia 7750 SR, where should the following policy be applied?

On the CE under the RIP context

On the PE under the BGP context

On the PE under the RIP context

On the CE under the BGP context

This policy is not required

36. In a VPRN, how does the service provider ensure that customer addresses are unique when multiple customers use the same address space?

It is the customer responsibility to ensure their address space is unique

The Route Distinguisher ensures that addresses are unique between customers.

The Route Target ensures that addresses are unique between customers

The provider will advise the customers to change their addresses

The provider will use NAT to ensure that addresses are unique between customers

37. Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP).

Which route is NOT present in PE1's global routing table?

192.60.100.0

10.10.10.6

10.10.10.3

192.50.1.1

38. Which of the following statements is true regarding the Route Distinguisher? (Choose three)

It is an 8 byte value containing 3 fields

The Route Distinguisher must have the same value as the Route Target.

The Administrator field contains either an AS number or an IP number

To ensure uniqueness, Route Distinguishers are assigned by the IAN

The Route Distinguisher is not used if the customer addresses do not overlap

The Assigned Number field must contain a public IP address

39. When does a router add a Route Target to a route?

When the P receives the route from the P

When the PE populates the route received from the CE into the VR

When the PE propagates the route to the C

When the PE exports the route from the VRF into the MP-BGP table.

40. Which of the following about BGP loops in a VPRN environment is FALSE?

Traditional BGP loop detection mechanisms may detect a loop in the VPRN scenario, which in fact is not present.

The Nokia 7750 SR accepts routes containing AS_PATH loops by default.

When the CLI command "config>router>bgp# loop-detect discard-route" is used, the Nokia 7750 SR sends a notification to the remote peer and drops the BGP session.

In VPRN implementations where the CE-PE protocol is BGP, it is possible for separate sites of the same customer to use the same BGP autonomous system number.

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41. Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Nokia 7750 SR for a customer carrier offering VPRN services.

Which of the following about this configuration is FALSE?

In the CSC VPRN, configure an eBGP session between CSC-PE and CSC-CE and use the "advertise-label vpn-ipv4" CLI command to enable the advertisement of VPN-IPv4 routes.

When the customer carrier uses the same autonomous system number in various sites, use the "loop-detect off" CLI command to disable the loop detection functionality on CSC-CE and PE routers.

On the CSC-PE routers, use the "carrier-carrier-vpn" CLI command to configure the VPRN service as CS

Configure an iBGP session between PE1 and PE2 and use the "family vpn-ipv4" CLI command to directly exchange end-customer routes learned from CE1 and CE2.

42. What are the two primary problems the service provider must consider when providing traditional Layer 3 VPN services using only a single common routing table in the provider core? (Choose two)

Memory exhaustion in the provider core

Route leaking between the customer networks

CPU utilization for route processing

Unwanted packet forwarding between customer networks

43. When a routing protocol is configured as the PE-CE protocol at one site of a customer VPRN, the same routing protocol must be configured as the PE-CE protocol at all other sites of the same customer VPRN.

True

False

44. Which of the following about inter-AS model B VPRN is FALSE?

Model B does not require the configuration of VPRN instances on the ASBRs.

The ASBRs exchange data packets that are encapsulated with a transport label and a service label.

The route target advertised in one AS is maintained and used in the remote A

The CLI command "configure router bgp enable-inter-as-vpn" is required on the ASBRs.

45. Complete the following statement. In a VPRN, the inner label is used to _______________.

Identify the customer network on the egress PE

Establish the LSPs between PE devices

Identify the egress PE in the MPLS domain

Identify the customer network on the ingress PE

46. Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Nokia 7750 SR for a customer carrier who is an Internet Service Provider (ISP).

Which of the following configuration steps is NOT required?

Configuring iBGP sessions between PEs residing in different customer carrier sites,

Configuring a policy on each CSC-CE to advertise local PE addresses to the network provider.

Configuring a CSC VPRN on each CSC-PE with a SAP interface towards the attached CSC-C

Configuring an IES service on PEL

47. Which command will display the Route Target associated to a specific prefix on an Nokia 7750 SR?

Show router bgp routes

Show router bgp routes <prefix> detail

Show router route-table

Show router <service-id> route-table

Either (b) or (d)

48. What are the two main benefits of a hub and spoke VPRN design? (Choose two)

Reduced number of VPN tunnels that need to be managed

Centralized filtering policies with the introduction of a hub site

Optimal routing between all sites

Limited configuration required on the hub PE device

49. Click the exhibit.

For the inter-AS model A VPRN. BGP is used as the PE-CE routing protocol.

Which of the following statements about the control plane operation is TRUE?

PE1 sends an IPv4 update for prefix 192.168.1.0/27 via MP-BGP to ASBR1.

ASBR1 sends an IPv4 update for prefix 192.168.1.0/27 to ASBR2.

ASBR1 transforms an IPv4 update for prefix 192.168.1.0/27 to a VPN-IPv4 route; allocates VPN label V1 and sends the update to ASBR2.

ASBR2 accepts a VPN-IPv4 update from ASBR1, then sends the update to PE2 via MP-BG

50. Click the exhibit.

Based on the VPRN aggregate route configuration, which routes are advertised to CE2?

172.12.10.0/24, 172.12.20.0/24 and 172.0.0.0/16

172.12.0.0/16 only

172.12.10.0/24 and 172.12.20.0/24

172.0.0.0/16 only

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51. Click the exhibit.

When configuring a VPRN service on an Nokia 7750 SR, where should the policy be applied?

On the CE under the OSPF context

On the PE under the BGP context

On the PE under the OSPF context

On the CE under the BGP context

This policy is not required.

52. In a VPRN that uses MPLS transport tunnels, which of the following statements about P devices is TRUE?

P devices participate in service provider core routing.

P devices are not required to be MPLS-enabled.

P devices must be aware of the VPRNs.

P devices must support MP-BG

53. In a VPRN, what type of logical topology is required for the BGP sessions configured in the provider core?

Full mesh between all CE, PE and P devices

Full mesh between PE and P devices

Full mesh of P devices

Full mesh of PE devices

Full mesh between PE and CE devices

54. Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider.

Which route is present in PE1's global routing table?

192.168.10.1

192.168.20.1

10.10.10.1

10.10.10.6

55. Which of the following statements best describes the output from an Nokia 7750 SR shown below?

The As-Path is not present as it was removed with the s-override configuration command

The As-Path is not present as it was removed with the o-as-path configuration command

The As-Path is not present as a policy was configured to set it to the null value

The As-Path is not present as VPN-IPv4 routes do not propagate the IPv4 As-Path BGP attribute

56. Which of the following about inter-AS model B VPRN is TRUE?

The ASBRs use MP-eBGP to peer with each other and exchange IPv4 routes between autonomous systems.

The ASBRs use MP-iBGP to peer with PE routers in their autonomous system and exchange VPN-IPv4 routes.

The ASBRs maintain a mapping of labels for IPv4 routes exchanged between autonomous systems.

The ASBRs require per-VPRN configuration.

57. What mechanism allows routes to be shared between customers in different VPRNs?

The routes to be shared are identified by common route targets

The routes to be shared are identified by common route distinguishers

The routes to be shared are identified by common AS numbers

The routes to be shared are identified by common VPN labels

58. Which of the following commands on an Nokia 7750 SR will verify connectivity for a VPRN service <service-id> when issued from the PE?

oam vprn-ping <service-id> source <source-ip> destination <destination-ip>

oam <service-id> vprn-ping source <source-ip> destination <destination-ip>

vprn-ping router <service-id> <destination-ip>

Ping <destination-ip> source <source-ip>

59. Based on the VPRN BGP decision process, which of the following routes is selected first?

The route with the lowest ME

The route with the shortest AS Path.

The route received from the lowest peer IP address.

The route with the lowest Origin.

60. Which of the following about eiBGP Load Balancing is FALSE?

ecmp and multipath must be configured within the VPRN instance.

The RD of the VPRN on the local PE must be different from the RD of the remote PEs.

Is enabled in the config>router>bgp context

Allows a PE router to load share traffic across routes learned from both direct CE-PE peerings and MP-BGP peerings.

Page 7 of 7

61. A CE hub and spoke VPRN has two spoke sites; which of the following would be the best option to implement this topology at the hub site PE?

One VPRN, one route distinguisher, and two route targets

Two VPRNs, one route distinguisher, and three route targets

Two VPRNs, two route distinguishers, and three route targets

One VPRN, two route distinguishers, and three route targets

62. Click the exhibit.

According to the display, a BGP loop is detected for route 192.168.1.0/27.

On which router is this command executed?

CE1

CE2

PE1

PE2

63. Which of the following describes the goal of an Extranet VPRN?

To reduce the number of VPRN tunnels required.

To allow routes to be exchanged between all, or selected, sites of one VPRN, and all, or selected, sites of a second VPR

To simplify the administration of multiple VPRNs.

To allow network access between the headquarter sites of each VPRN service and a shared VPRN service offered by a third party.

64. VPN-IPv4 addressing is made unique by defining an address structure consisting of:

A 32 bit IPv4 address followed by a 64 bit Route Target

A 32 bit IPv4 address followed by a 64 bit Route Distinguisher

A 64 bit Route Target followed by a 32 bit IPv4 address

A 64 bit Route Distinguisher followed by a 32 bit IPv4 address

A 32 bit Route Distinguisher followed by a 32 bit IPv4 address FA 32 bit Route Target followed by a 32 bit IPv4 address

65. Why would a selective export policy be applied to a customer VPRN service? (Choose three)

To limit the number of routes advertised from a customer site

To limit the number of routes learned from other customer sites

To limit the size of the VRF table

To limit connectivity to selected customer networks

To perform packet filtering

Nokia Virtual Private Routed Networks 4A0-106 Updated Questions

Nokia Virtual Private Routed Networks 4A0-106 Updated Questions

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