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

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Nokia Virtual Private Routed Networks Questions and Answers

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Question 1

Which of the following describes how a route is handled when is received at the PE from the local CE?

Options:

A.

It will be placed into the customer VRF and automatically propagated into the BGP table

B.

It will be placed into the customer VRF and then be propagated to the BGP table only if BGP is used as the PE-CE protocol

C.

It will be placed into the customer VRF and require an export policy to be propagated to the BGP table

D.

It will be placed into the customer VRF and require an export policy to be propagated to the BGP table if RIP is used as the PE-CE protocol

E.

It will be placed into the customer VRF and require an export policy to be placed into the BGP table if a protocol other than BGP is used as the PE-CE protocol

Question 2

An advantage of using BGP as the PE-CE protocol is that route policies are no longer required to control the exchange of routes from BGP to MP-BGP.

Options:

A.

True

B.

False

Question 3

Which of the following commands on an Nokia 7750 SR will verify connectivity for a VPRN service when issued from the PE?

Options:

A.

oam vprn-ping source destination

B.

oam vprn-ping source destination

C.

vprn-ping router

D.

Ping source

Question 4

Complete the following statement. In a VPRN, the label signaled by RSVP-TE is used to ______________.

Options:

A.

Identify the egress PE in the MPLS domain

B.

Signal the egress VPRN ID

C.

Identify the ingress PE in the MPLS domain

D.

Transport route updates between PEs

Question 5

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

Options:

A.

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

B.

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

C.

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

D.

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

Question 6

An SDP has been configured for a VPRN service using an existing MPLS LSP and the configuration shown below. Which of the statements below is true about the configuration on an Nokia 7750 SR?

Options:

A.

The configuration is incomplete as the uto-bind command is missing

B.

The configuration is incomplete as the ignaling off command is missing

C.

The configuration is incorrect as VPRN service does not support spoke-sdp configuration using MPLS LSPs

D.

The configuration is incorrect as Line 8 should be poke-sdp 42 mpls create

E.

The configuration is complete and correct

Question 7

In a traditional layer 3 VPN which of the following will be an issue when there is overlapping address space between two customers? Choose the best answer.

Options:

A.

There will be increased memory usage on the PE

B.

There will be increased CPU utilization on the PE

C.

The CE will reject the overlapping prefix

D.

The PE will not recognize the prefixes as being different

E.

There is no issue with overlapping address space in a traditional Layer 3 VPN

Question 8

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?

Options:

A.

192.60.100.0

B.

10.10.10.6

C.

10.10.10.3

D.

192.50.1.1

Question 9

Assuming that as-override has been used, which of the following statements describes the most likely location of prefix 10.1.2.0/24, based on the output from an Nokia 7750 SR shown below?

Options:

A.

It 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.

There may be two or more Autonomous Systems between the local AS and the AS that originated the prefix

E.

It is located in Autonomous System 65100

Question 10

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. If CE1 sends an IP packet to 192.168.200.1, which of the following is FALSE?

Options:

A.

CE1 forwards the data packet to PE1 via the VPRN 20 interface.

B.

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

C.

CSC-CE1 pops the LDP label and swaps the BGP label.

D.

CSC-PE1 pops the BGP label and pushes a VPN label and an MPLS transport label.

Question 11

Which of the following about inter-AS model AVPRN is TRUE?

Options:

A.

It is the most scalable of the Inter-AS models.

B.

VRF configuration is not required on the ASBRs.

C.

Most routers that support VPRN functionality do not support model A by default.

D.

It is not necessary to run MPLS at the boundary between autonomous systems.

Question 12

Click the exhibit.

An Nokia 7750 SR is to be configured as a core router that supports VPRNs using LDP as the transport protocol. Which of the following best describes this configuration?

Options:

A.

This configuration is correct and complete.

B.

This configuration is correct, but the interfaces must also be configured in the "configure router mpls" context.

C.

There is no configuration required for LDP in the core network.

D.

This configuration is correct but Targeted-LDP is also required.

Question 13

Which of the following best describes the goal of an Extranet VPRN?

Options:

A.

Allow routes to be exchanged between all or selected sites of one VPRN and all or selected sites of a second VPRN

B.

Allow the service provider to provide multiple VPRNs with Internet access

C.

Reduce the number of VPRN tunnels required

D.

Simplify the administration of multiple VPRNs

E.

Force all traffic in multiple VPRNs to pass through a single device

Question 14

Which of the following about the configuration of VPRN Outbound Route Filtering (ORB on an Nokia 7750 SR is TRUE?

Options:

A.

The ORF configuration must be done under the BGP neighbor context only.

B.

When sending is enabled, the ORF function takes the route target list configured in all outbound policies and pushes this list to the peer by default.

C.

When configuring ORF, the session with the peer must be cleared/reset for the new capability negotiation to take place.

D.

When Outbound Route Filtering is configured, both the sending and acceptance of ORF are enabled by default.

Question 15

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 16

Click the exhibit.

Router R4 is an Nokia 7750 SR configured for the extranet VPRN network. Which CLI command is executed on router R4 to produce the displayed output?

Options:

A.

"show router 10 route-table"

B.

"show router route-table"

C.

"show router 20 route-table"

D.

There is no CLI command that can produce this output on router R4

Question 17

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 18

What operation does a P device perform when it receives a labeled packet for a VPRN service?

Options:

A.

It forwards the packet based on the label signaled by MP-BGP.

B.

It decrements the TTL and forwards the packet based on the inner label.

C.

It swaps the outer label then forwards the packet.

D.

The P router does not perform any operations on labeled packets.

Question 19

Click the exhibit.

For the inter-AS model B VPRN, which of the following is the correct BGP configuration on ASBR1?

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 20

In a Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT a benefit to the network provider?

Options:

A.

The solution scales as the number of VPNs offered by the customer carriers increases.

B.

The solution scales as the number of end-customer routes increases.

C.

There is no need to manage end-customer services.

D.

The solution scales as the number of serviced customer carriers increases.

Question 21

Click the exhibit.

The headquarter sites of VPRN 10 and VPRN 20 ate part of an extranet VPRN. Which of the following communities are included in the export policy applied to VPRN 10 on router R1?

Options:

A.

"Extranet-VPN-Blue" and "Extranet-VPN-Green"

B.

"Blue-Only"

C.

"Extranet-VPN-Blue"

D.

"Blue-Green"

Question 22

Which of the following about VPRN Outbound Route Filtering (ORF) is FALSE?

Options:

A.

Resources consumed at the sender and receiver PEs can be reduced by using BGP ORF.

B.

BGP ORF allows a receiving PE to filter out unnecessary inbound routes.

C.

A PE indicates its ORF capabilities to its neighbor PE in a BGP Open message.

D.

BGP ORF is most effective when a large number of routes is being exchanged between two peers, and most routes are filtered out on arrival.

Question 23

Click the exhibit.

For the extranet VPRN and community lists shown, which of the following communities will be included in the export policy applied to VPRN 20 on router R2?

Options:

A.

"Blue-Only"

B.

"Blue-Only" and "Blue-Green"

C.

"Green-Only"

D.

"Extranet-VPN-Green"

E.

"Blue-Green"

Question 24

Click the exhibit.

All sites in the displayed network require Internet access. Route reflector 1(RR1) is used for Internet routes only and route reflector 2(RR2) is used for VPN routes only. Which of the following is FALSE?

Options:

A.

BGP sessions between RR1 and PE routers support only the IPv4 address family.

B.

BGP sessions between RR2 and PE routers support only the VPN-IPv4 address family.

C.

RR2 establishes BGP sessions with PEL PE2 and PE3.

D.

RR1 establishes BGP sessions only with PE1 and PE2.

Question 25

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 26

Which of the following about the Route Target is TRUE?

Options:

A.

The Route Target is added to an IPv4 route to create the VPN-IPv4 route.

B.

The Route Target is an extended community string that identifies VPN membership.

C.

A route can have only one Route Target.

D.

The Route Target is a 64-bit value added to customer prefixes to make them unique.

Question 27

When VPRN Outbound Route Filtering (ORF) is enabled, each PE sends its ORF list to its peer using which of the following BGP message types?

Options:

A.

Open

B.

Update

C.

Route Refresh

D.

Notification

Question 28

Click the exhibit.

For the Inter-AS model B VPRN, which of the following about the inter-as-label output on ASBR1 is TRUE?

Options:

A.

ASBR1 includes label 131069 in the route update sent to ASBR2.

B.

ASBR1 includes label 131068 in the route update sent to ASBR2.

C.

ASBR1 includes label 131068 in the route update sent to PEL

D.

ASBR1 includes labels 131068 and 131069 in the route update sent to ASBR2.

Question 29

Click the exhibit.

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 30

The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route target(s) should be imported under the VPRN 10 service on router R1?

Options:

A.

target:65100:1 only

B.

target:65100:1 and target:65100:2

C.

target:65100:1 and target:65100:3

D.

target:65100:1, target:65100:2, and target:65100:3

Question 31

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 32

Click the exhibit.

Routers RR1 and RR2 are configured as route reflectors. For the inter-AS model C VPRN, which of the following about the BGP sessions established between the routers is TRUE?

Options:

A.

ASBR2 has a total of three BGP sessions established: one with PE2, one with RR2, and one with ASBR1.

B.

RR1 has a total of three BGP sessions established: one with PEL one with RR2, and one with ASBRL

C.

PE2 has a total of two BGP sessions established: one with RR2 and one with ASBR2.

D.

PE1 has a total of two BGP sessions established: one with RR1 and one with PE2.

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