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Nokia 4A0-106 Nokia Virtual Private Routed Networks Exam Practice Test

Demo: 32 questions
Total 214 questions
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Nokia Virtual Private Routed Networks Questions and Answers

Question 1

Which of the following terms also correctly describes a Layer 3 VPN?(Choose three)

Options:

A.

VPRN

B.

BGP/MPLS VPN

C.

VLL

D.

VPLS

E.

IP-VPN

F.

ePipe

Question 2

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.

Options:

A.

The SDP path-MTU minus 14

B.

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

C.

The configured service-mtu of the VPLS service

D.

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

E.

The SDP path-MTU

Question 3

What command is required to configure the PE devices for a VPRN service on an Nokia 7750 SR?

Options:

A.

Family vpn-ipv4

B.

Family vprn-ipv4

C.

Family vprn

D.

Address-family vpn-ipv4

E.

Address-family vprn-ipv4

F.

Address-family vprn

Question 4

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

Options:

A.

The route with the lowest MED.

B.

The route with the shortest AS Path.

C.

The route received from the lowest peer IP address.

D.

The route with the lowest Origin.

Question 5

Which protocol is used to exchange customer VPRN routes between PE devices?

Options:

A.

OSPF

B.

ISIS

C.

MP-BGP

D.

BGP

E.

Targeted LDP

Question 6

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

Options:

A.

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

B.

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

C.

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

D.

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

Question 7

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

Options:

A.

P devices participate in service provider core routing.

B.

P devices are not required to be MPLS-enabled.

C.

P devices must be aware of the VPRNs.

D.

P devices must support MP-BGP.

Question 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?

Options:

A.

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

B.

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

C.

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

D.

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

Question 9

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

Options:

A.

Reduced number of VPN tunnels that need to be managed

B.

Centralized filtering policies with the introduction of a hub site

C.

Optimal routing between all sites

D.

Limited configuration required on the hub PE device

Question 10

Which of the following about Carrier Supporting Carrier (CSC) VPRN is FALSE?

Options:

A.

CSC eliminates the need for customer carriers to build and maintain their own MPLS backbone.

B.

CSC is also known as carrier's carrier or carrier serving carrier.

C.

The customer carrier provides VPN or Internet services to its end-customers.

D.

A CSC VPRN is configured on the customer carrier's CSC-CE routers.

Question 11

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?

Options:

A.

One VPRN, one route distinguisher, and two route targets

B.

Two VPRNs, one route distinguisher, and three route targets

C.

Two VPRNs, two route distinguishers, and three route targets

D.

One VPRN, two route distinguishers, and three route targets

Question 12

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.

Options:

A.

This configuration is correct and complete

B.

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

C.

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

D.

MPLS configuration is not required

Question 13

Click the exhibit.

Internet access using route leaking between the VRF and the global routing table is configured in the network. Which of the following is the correct output of route 192.168.50.1 in the global routing table of PE3?

Options:

A.

A

B.

B

C.

C

D.

D

Question 14

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?

Options:

A.

CE1

B.

CE2

C.

PE1

D.

PE2

Question 15

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

Options:

A.

Targeted-LDP

B.

BGP

C.

MP-BGP

D.

RSVP-TE

Question 16

After configuring OSPF as the PE to CE routing protocol for a VPRN service you get the following output from an Nokia 7750 SR: What is most likely wrong with the configuration?

Options:

A.

OSPF is not configured on the CE router

B.

There is a problem with OSPF authentication

C.

The operational MTU does not match

D.

The PE and CE router have different OSPF interface types configured

E.

None of the above

Question 17

Community lists are configured for the PE hub and spoke VPRN.

Which communities should be imported by the VPRN service on PE1?

Options:

A.

“Spoke_Sites”

B.

“Hub_Site”

C.

“Spoke_Sites” and “Hub_Site”

D.

No communities should be imported.

Question 18

When using the AS-override method to prevent BGP loops in VPRNs, where should the "as-override" CLI command be configured?

Options:

A.

On the PE facing the CE neighbor

B.

On the CE facing the PE neighbor

C.

On the P facing the PE neighbor

D.

On the PE facing the PE neighbor

Question 19

Click the exhibit.

AS-override is configured on PE1 to eliminate the BGP loops. What is the expected AS-Path in the VPN-IPv4 route 64496:10:192.168.2.0/27 received by PE1?

Options:

A.

64496 64497

B.

64496

C.

64497

D.

64497 64497

Question 20

Which of the following about BGP loops in a VPRN environment is TRUE?

Options:

A.

Traditional BGP loop detection mechanisms are unable to detect a loop in a VPRN scenario.

B.

BGP loops are detected in a VPRN when the customer has separate sites using the same BGP autonomous system number.

C.

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

D.

When "remove-private" is configured at a PE, all routes received from the associated CE will have private AS numbers removed.

Question 21

Which of the following statements about inter-AS model C VPRNs is FALSE?

Options:

A.

VPN-IPv4 routes are neither held, nor re-advertised, by the ASBRs.

B.

Each ASBR propagates the routes received from its neighbor ASBR as labeled IPv4 routes in its own AS.

C.

ASBRs exchange labeled IPv4 routes for the system addresses of PE routers.

D.

ASBRs exchange customer routes as labeled IPv4 routes.

Question 22

The CLI command “remove-private” is configured on PE1 to eliminate BGP loops in the VPRN.

For the displayed route, what is the value of the AS-Path field?

Options:

A.

64496 64512

B.

64512

C.

64496

D.

64512 64496

Question 23

Which of the following about scaling techniques for route reflectors is FALSE?

Options:

A.

Logical Partitioning of route reflectors works best when PEs are partitioned to support different VPRNs.

B.

Logical Partitioning of route reflectors is simple and scalable, but requires more hardware.

C.

Filtering at route reflectors requires either inbound filtering at the route reflector or outbound filtering at the PE routers.

D.

Filtering at route reflectors allows the route reflector to filter routes received from PEs and only accept routes with a certain route distinguisher.

Question 24

Which of the following about a full mesh VPRN design is FALSE?

Options:

A.

Each customer site has a logically direct route to every other customer site.

B.

It provides optimal routing between all sites.

C.

It allows access between all CE devices and all sites participating in the same VRF.

D.

It requires a full BGP mesh in the provider core.

Question 25

Which of the following about the configuration of an inter-AS model C VPRN is FALSE?

Options:

A.

MP-iBGP sessions must be configured between the PE routers in each AS.

B.

LDP must be configured in each AS.

C.

MP-eBGP sessions must be configured between the ASBRs.

D.

The ASBRs must be configured with "enable-inter-as-vpn".

Question 26

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

Options:

A.

The customer carrier does not learn any network provider routes.

B.

The network provider must learn the customer carrier PE and CE system addresses.

C.

Routes exchanged between CSC-CE and CSC-PE are labeled.

D.

The customer carrier PE system addresses are populated in the CSC VRF.

Question 27

If Route Reflector 1 (RR1) is used for Internet routes, and Route Reflector 2 (RR2) is used for VPN routes, which of the following is TRUE?

Options:

A.

BGP sessions established between RR2 and the PEs support IPv4 and VPN-IPv4 address families.

B.

BGP sessions established between RR1 and the PEs support the IPv4 address family only.

C.

BGP sessions established between RR1 and the PEs support IPv4 and VPN-IPv4 address families.

D.

BGP sessions established between RR2 and the PEs support the IPv4 address family only.

Question 28

AVPLS spoke SDP is terminated on a VPRN service. The remote side of the spoke SDP is operationally * Down' with a flag of ' Service MTU Mismatch'. Which command can you use on an Nokia 7750 SR to show the signaled operational VC-MTU?

Options:

A.

show service id base

B.

show router Idp bindings

C.

show service id sdp detail

D.

show service id vc-mtu

Question 29

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). Which of the following about route distribution is FALSE?

Options:

A.

The VRF 10 on CSC-PE1 includes PE1 and PE2's system addresses.

B.

The global routing table of PE1 includes PE2's system address.

C.

The VRF 10 on CSC-PE2 includes CEI'S address.

D.

The global routing table of PE2 includes CE1's address.

Question 30

How are local CE routes associated with the appropriate VRF at the PE?

Options:

A.

Based on the interface on which they are received.

B.

Based on the Route Distinguisher.

C.

Based on the Route Target.

D.

Based on the Service Identifier.

Question 31

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

Options:

A.

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

B.

The ASBRs peer with each other to transport VPN-IPv4 routes between autonomous systems.

C.

PE routers distribute VPN-IPv4 routes to their local ASBR.

D.

One single ASBR is required in each AS to hold the routes for all VPRNs.

Question 32

Click the exhibit.

Assuming that the as-override command is used, what is the most likely location of prefix 10.1.2.0/24?

Options:

A.

The prefix is located in an Autonomous System directly connected to this router.

B.

There is a single Autonomous System between the local AS and the AS that originated the prefix.

C.

There are two Autonomous Systems between the local AS and the AS that originated the prefix.

D.

The prefix is located in Autonomous System 65100.

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Demo: 32 questions
Total 214 questions
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