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4A0-106 Questions and Answers

Question # 6

Click the exhibit.

Community lists are configured for the PE hub and spoke VPRN. Which communities should be exported by the VPRN service on PE1?

A.

"Spoke.Sites" and "Hub_Site"

B.

"Spoke_Sites"

C.

"Hub_Site"

D.

No communities should be exported

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Question # 7

What is wrong with the configuration shown below?

A.

The VPRN ID must be the same value as is used in the vrf-target command

B.

The VPRN ID must be the same value as is used in the route-distinguisher command

C.

The router-id command should not be used in this context

D.

The vrf-target command is mandatory

E.

There is nothing wrong with this configuration

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Question # 8

Click the exhibit.

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

A.

iBGP

B.

eBGP

C.

MP-iBGP

D.

MP-eBGP

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Question # 9

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

A.

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

B.

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

C.

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

D.

The ASBRs require per-VPRN configuration.

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Question # 10

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?

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

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Question # 11

Click the exhibit.

Based on the displayed configuration, which routes does PE3 place in the VPRN 10 routing table?

A.

The routes learned from CE3 and PE1.

B.

The route learned from CE3 only.

C.

The routes learned from PE1 and PE2.

D.

The routes learned from CE3 and PE2.

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Question # 12

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?

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.

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Question # 13

Click the exhibit.

When configuring the double lookup functionality, which configuration forces the global routing table to be consulted for any packet matching the VPRN default route?

A.

A

B.

B

C.

C

D.

D

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Question # 14

A service provider core consists of 6 PE and 4 P routers. Assuming route reflection is not used, how many internal BGP sessions are required in the service provider network for a correct operation of VPRN services?

A.

1

B.

5

C.

15

D.

30

E.

45

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Question # 15

Which of the following commands produces the output for the inter-AS model B VPRN?

A.

show router 10 bgp routes vpn-ipv4

B.

show router bgp routes

C.

show router bgp routes vpn-ipv4

D.

show router route-table

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Question # 16

Click the exhibit.

The AS-override method is used to prevent BGP loops in the blue customer VPRN. Which statement about the configuration is TRUE?

A.

the configuration is complete and correct.

B.

'as-override' should be configured under the BGP context.

C.

'as-override' should be configured under the group context.

D.

'as-override' should not be part of this configuration.

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Question # 17

Click the exhibit.

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

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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Question # 18

For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internet connectivity to its end-customers, which of the following is TRUE?

A.

The customer carrier network must be MPLS-enabled.

B.

VPRN instances are created on the CSC-CE routers.

C.

All traffic exchanged between end-customers is carried over a single CSC VRF.

D.

Customer carrier PEs residing in different sites must run MP-iBGP between them to exchange customers' routes.

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Question # 19

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.

A.

True

B.

False

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Question # 20

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

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".

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Question # 21

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)

A.

Show router bgp routes

B.

Show router bgp routes prefix <prefix>

C.

Show router bgp routes <prefix> self-originated

D.

Show router bgp routes <prefix> hunt

E.

Show router bgp neighbor advertised-routes

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Question # 22

In a VPRN the PE device is configured to run which of the following protocols? (Choose three.)

A.

MP-BGP for exchanging customer routes with other PEs

B.

A routing protocol for exchanging customer routes with the CE

C.

MPLS for exchanging labels with other provider core devices

D.

MPLS for exchanging labels with the CE devices

E.

Targeted LDP for exchanging VPRN labels with other PE devices

F.

A label signaling protocol for defining transport tunnels between PE and CE devices

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Question # 23

You are configuring a VPLS spoke termination to a VPRN on an Nokia 7750 SR. If LDP is used for all transport tunnels, what type of sessions are established by the VPRN PE router that is configured with the spoke termination?

A.

T-LDP and LDP sessions with the other VPRN PE routers and the VPLS PE router

B.

T-LDP sessions with the other VPRN PE routers and the VPLS PE router

C.

LDP sessions with the other VPRN PE routers and the VPLS PE router

D.

LDP sessions with the other VPRN PE routers, and both T-LDP and LDP sessions with the VPLS PE router

E.

T-LDP and LDP sessions with the other VPRN PE routers and LDP sessions with the VPLS PE router

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Question # 24

Where are VPN-IPv4 addresses used in a VPRN?

A.

In the routing updates exchanged from CE to PE

B.

In the routing updates exchanged from PE to PE

C.

In the routing updates exchanged from P to PE

D.

In customer packets as they traverse the provider core

E.

In all route tables of the VPRN control plane

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Question # 25

When configuring BGP as the PE-CE protocol on an Nokia 7750 SR, the configuration on the CE is done under the ____________ context and the PE configuration is under the ____________ context.

A.

Global, router

B.

Router, router

C.

Service, router

D.

Router, service

E.

Service, service

F.

Router, global

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Question # 26

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

A.

One Route Distinguisher per VRF route

B.

One Route Distinguisher per VRF

C.

One Route Distinguisher per VRF per site

D.

One Route Distinguisher per VPN

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Question # 27

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

A.

The BGP session from PE to P is not operational

B.

The BGP session between PEs is operational

C.

The BGP session between PE and CE is not operational

D.

The BGP session from PE to CE is operational

E.

The BGP session between PEs is not operational

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Question # 28

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?

A.

PE1

B.

PE2, PE3 and PE4

C.

PE1, PE2, PE3 and PE4

D.

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

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Question # 29

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

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

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Question # 30

For Carrier Supporting Carrier (CSC) VPRN, which of the following is NOT applicable to both types of customer carriers: BGP/MPLS service providers and Internet service providers?

A.

eBGP is used for route and label exchange between CSC-CE and CSC-PE routers.

B.

iBGP can be used to distribute routes between CSC-CE and PE routers.

C.

MP-iBGP is used to advertise routes between the CSC-PE routers.

D.

MP-iBGP is used to advertise end-customer and Internet routes directly between the PE routers.

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Question # 31

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?

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.

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Question # 32

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?

A.

"Blue-Only"

B.

"Blue-Only" and "Blue-Green"

C.

"Green-Only"

D.

"Extranet-VPN-Green"

E.

"Blue-Green"

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