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  • Exam Name: Nokia Virtual Private Routed Networks
  • Last Update: Jul 23, 2024
  • Questions and Answers: 214
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4A0-106 Practice Exam Questions with Answers Nokia Virtual Private Routed Networks Certification

Question # 6

Click the exhibit.

4A0-106 question answer

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?

A.

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

B.

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

C.

CSC-PE1 pops the BGP label, swaps the VPN label, and pushes an LDP transport label.

D.

CSC-PE2 pops the LDP and VPN labels and pushes a BGP label.

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Question # 7

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

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.

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Question # 8

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?

A.

Open

B.

Update

C.

Route Refresh

D.

Notification

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Question # 9

Click the exhibit.

4A0-106 question answer

If the displayed command is executed, what is the correct value of AS-Path in the BGP route 172.12.0.0/16 advertised by PE2?

A.

64491 {64492 64493}

B.

64491

C.

64492 64493 64491

D.

{64492 64493)64491

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Question # 10

Click the exhibit.

4A0-106 question answer

For the CE hub and spoke VPRN, which of the following is FALSE?

A.

The primary VRF on PE1 contains routes learned from spoke sites.

B.

All traffic between spoke sites must pass through CE1.

C.

The secondary VRF on PE1 is used to route data packets from the hub CE to the spoke sites.

D.

PE1 advertises the primary VRF routes to CE1.

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Question # 11

Click the exhibit.

4A0-106 question answer

The headquarter sites of VPRN 10 and VPRN 20 are part of an extranet VPRN. Which route targets should be exported under the VPRN 20 service on router R1?

A.

target:65100:2 and target:65100:3

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 # 12

Click the exhibit.

4A0-106 question answer

For the Inter-AS model B VPRN, which of the route updates for prefix 192.168.1.0/27 is incorrect?

A.

The route update sent from PE1.

B.

The route update sent from PE2.

C.

The route update sent from ASBR1.

D.

The route update sent from ASBR2.

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Question # 13

For the data packets in a VPRN, how is the inner label in an MPLS packet signaled?

A.

Signaled via MP-BGP and used to identify the egress PE.

B.

Signaled via T-LDP and used to identify the customer VPRN.

C.

Signaled via MP-BGP and used to identify the customer VPRN.

D.

Signaled via RSVP and LDP and used to identify the egress PE.

E.

Signaled via RSVP and LDP and used to identify the customer VPRN.

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Question # 14

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

4A0-106 question answer

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

A.

“Spoke_Sites”

B.

“Hub_Site”

C.

“Spoke_Sites” and “Hub_Site”

D.

No communities should be imported.

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Question # 15

Click the exhibit.

4A0-106 question answer

For the inter-AS model B VPRN, which of the following is TRUE when CE2 sends an IP packet to 192.168.1.1?

A.

PE2 pushes one label on the IP packet and forwards it to ASBR2.

B.

ASBR2 sends the IP packet with one label to ASBR1.

C.

ASBR1 sends the IP packet with one label to PEL

D.

PE1 pops one label off the IP packet and forwards it to CE1.

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Question # 16

Which of the following about the configuration of BGP Site of Origin (SoO) is TRUE?

A.

Each PE must implement a policy to apply a unique SoO attribute to the set of routes received from each customer site.

B.

A different BGP extended community is used on each PE that connects to a single site.

C.

An import policy on the PE rejects a route if the attached SoO matches the configured value.

D.

Import and export policies are applied on the PEs under the global BGP context.

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Question # 17

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

A.

The route with the shortest AS path.

B.

The route with the lowest route or tunnel table cost to the NEXT_HOP.

C.

The route with the highest local preference.

D.

The route with the lowest originator ID or BGP identifier.

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Question # 18

Click the exhibit.

4A0-106 question answer

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 # 19

Click the exhibit.

4A0-106 question answer

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?

A.

64496 64497

B.

64496

C.

64497

D.

64497 64497

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Question # 20

Click the exhibit.

4A0-106 question answer

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

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.

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Question # 21

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 # 22

Click the exhibit.

4A0-106 question answer

How many route targets and route distinguishers are required to implement the extranet VPRN?

A.

Three route targets and three route distinguishers

B.

Five route targets and three route distinguishers

C.

Three route targets and two route distinguishers

D.

Five route targets and two route distinguishers

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Question # 23

Which of the following is not a valid BGP design for a network provider supporting VPRNs?

A.

Full mesh of MP-BGP between all P devices

B.

Full mesh of MP-BGP between PE devices

C.

Route reflector configuration between PE devices

D.

Confederation configuration between PE devices

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Question # 24

Click the exhibit.

4A0-106 question answer

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?

A.

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

B.

"Blue-Only"

C.

"Extranet-VPN-Blue"

D.

"Blue-Green"

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Question # 25

In inter-AS model C VPRN, which of the following about the command "advertise-label ipv4" is TRUE?

A.

This command is required on all PE routers to distribute labeled IPv4 routes directly to PEs in remote AS.

B.

This command is required on the ASBRs to exchange labeled IPv4 routes between the ASs.

C.

This command is required on the route reflectors to exchange customer routes between ASs as labeled IPv4 routes.

D.

This command is required on all PE routers to distribute labeled IPv4 routes to connected CEs.

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Question # 26

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

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

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Question # 27

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

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.

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Question # 28

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

A.

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

B.

It requires a route reflector to be configured in each AS for successful operation.

C.

VPN-IPv4 routes are neither maintained nor distributed by the ASBRs.

D.

PE routers in different ASes exchange VPN-IPv4 routes directly between each other using MP-eBGP.

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Question # 29

Click the exhibit.

4A0-106 question answer

The displayed output is from an ASBR supporting an inter-AS model A VPRN. Which of the following statements about this output is TRUE?

A.

The neighbor shown is an ASBR router.

B.

The address family between the peers should be VPN-IPv4 instead of IPv4.

C.

The neighbor address cannot be the interface address 10.3.4.4.

D.

The omitted AS number under "BGP summary" must be equal to 64496.

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Question # 30

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

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.

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Question # 31

For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is a BGP/MPLS VPN service provider, which of the following is TRUE?

A.

The customer carrier network can be a pure IP network.

B.

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

C.

If the customer carrier offers VPRN services, PE routers residing in different customer carrier sites must run iBGP between them to exchange IPv4 routes.

D.

If the customer carrier offers VPRN services, the network provider stores the end-customer routes in its CSC VPRN.

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Question # 32

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?

4A0-106 question answer

A.

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

B.

ASBR1 pops the LDP label, swaps the BGP label and forwards the IP packet to ASBR2.

C.

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

D.

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

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Question # 33

Click the exhibit.

4A0-106 question answer

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

Full Access
Question # 34

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

4A0-106 question answer

A.

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

B.

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

C.

The update is rejected

D.

The peer session is dropped

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Question # 35

Click the exhibit.

4A0-106 question answer

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?

A.

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

B.

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

C.

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

D.

Configuring an IES service on PEL

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Question # 36

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

A.

Static

B.

RIP

C.

OSPF

D.

IS-IS

E.

MP-BGP

F.

BGP

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Question # 37

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

4A0-106 question answer

4A0-106 question answer

A.

Sap 1/1/1 create

B.

Sap 1/1/1 customer 10 create

C.

No shutdown

D.

Neighbor 192.168.1.2

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Question # 38

Click the exhibit.

4A0-106 question answer

For the inter-AS model B VPRN, which of the following is FALSE when CE2 sends an IP packet to 192.168.1.1?

A.

PE2 pushes one label on the IP packet and forwards it to ASBR2.

B.

ASBR2 forwards the IP packet with one label to ASBR1.

C.

ASBR1 forwards the IP packet with two labels to PEL

D.

PE1 forwards an unlabeled IP packet to CE1.

Full Access
Question # 39

What are the main functions of a Layer 3 VPN? (Choose three).

A.

Distributing customer routing information between sites

B.

Forwarding customer data packets

C.

Providing an integrated billing solution

D.

Maintaining separation between distinct customer networks

E.

Allowing the implementation of Layer 3 devices in the provider core

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Question # 40

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?

A.

It will label switch the packet based on this label

B.

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

C.

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

D.

The P router does not perform any operation on this label

Full Access
Question # 41

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 # 42

Click the exhibit.

4A0-106 question answer

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

A.

ASBR1# show router 10 bgp routes vpn-ipv4

B.

ASBR1# show router bgp routes

C.

ASBR1# show router bgp routes vpn-ipv4

D.

ASBR1# show router route-table

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Question # 43

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

A.

This is the base routing table from CE-1

B.

This is the base routing table from PE-1

C.

This is the customer vrf from CE-1

D.

This is the customer vrf from PE-1D.This is the customer vrf from PE-1

E.

This is the customer vrf from PE-2E.This is the customer vrf from PE-2E.This is the customer vrf from PE-2

F.

This is the base routing table from PE-2F.This is the base routing table from PE-2F.This is the base routing table from PE-2

G.

This is the base routing table from CE-2G.This is the base routing table from CE-2G.This is the base routing table from CE-2

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Question # 44

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 # 45

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

A.

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

B.

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

C.

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

D.

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

E.

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

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Question # 46

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

A.

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

B.

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

C.

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

D.

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

E.

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

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Question # 47

When would it be appropriate to use the as-override command?

4A0-106 question answer

A.

When sites of different VPRN customers use the same BGP AS number

B.

When sites of the same VPRN customer use the same BGP AS number

C.

When sites of different VPRN customers use different BGP AS numbers

D.

When sites of the same VPRN customer use different BGP AS numbers

E.

When the customer site AS number is the same as the provider AS number

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Question # 48

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

A.

Participate in service provider core routing

B.

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

C.

Run a common routing protocol with the CE router

D.

Must support MP-BGP

E.

Do not have any connections to the CE

F.

Must be aware of the VPRNs

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Question # 49

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

A.

To limit the number of routes advertised from a customer site

B.

To limit the number of routes learned from other customer sites CTo limit the size of the VRF table

C.

To limit connectivity to selected customer networks

D.

To perform packet filtering

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Question # 50

In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the network provider?

A.

No need to build and maintain its own backbone.

B.

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

C.

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

D.

The ability to manage end-customer services.

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Question # 51

Click the exhibit.

4A0-106 question answer

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

A.

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

B.

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

C.

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

D.

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

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Question # 52

Click the exhibit.

4A0-106 question answer

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?

A.

192.168.10.1

B.

192.168.20.1

C.

10.10.10.1

D.

10.10.10.6

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Question # 53

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

A.

It is an 8 byte value containing 3 fields

B.

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

C.

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

D.

To ensure uniqueness, Route Distinguishers are assigned by the IANA.

E.

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

F.

The Assigned Number field must contain a public IP address

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Question # 54

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

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

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Question # 55

Click the exhibit.

4A0-106 question answer

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?

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.

Full Access
Question # 56

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

A.

To reduce the number of VPRN tunnels required.

B.

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

C.

To simplify the administration of multiple VPRNs.

D.

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

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Question # 57

Which of the following about BGP Site of Origin (SoO) is FALSE?

A.

The SoO attribute can be used to uniquely identify the site from which a PE learns routes.

B.

Before a PE redistributes a VPN-IPv4 route, it can assign an SoO attribute to the route.

C.

The SoO attribute can be used to prevent loops from a single site with multiple CE-PE connections.

D.

The SoO attribute can be used as matching criteria when redistributing routes from the CE to the PE.

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Question # 58

What is the minimum number of Route Distinguishers required to implement an overlapping VPRN involving 5 different customers?

A.

1

B.

3

C.

5

D.

7

E.

10

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Question # 59

Which of the following about an Nokia 7750 SR MP-BGP update is FALSE? Assume default behavior.

A.

An MP-BGP update carries an MPLS label that is used as the service label for a VPRN.

B.

There can be multiple Route Targets per route in an MP-BGP update.

C.

There can only be one Route Distinguisher per route in an MP-BGP update.

D.

On a specific PE, the MP-BGP updates for prefixes from a single VPRN carry different labels.

E.

Traditional BGP attributes and MP-BGP attributes are present in an MP-BGP update.

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Question # 60

Which command should be used on an Nokia 7750 SR acting as the PE, to view the table containing the BGP routes received from the remote sites?

A.

Show router bgp routes

B.

Show router bgp routes address-family vpn-ipv4

C.

Show router bgp routes

D.

Show router bgp routes

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Question # 61

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

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

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Question # 62

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

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.

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Question # 63

Click the exhibit.

4A0-106 question answer

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

A.

PE1

B.

RR1

C.

ASBR1

D.

ASBR2

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Question # 64

Click the exhibit.

4A0-106 question answer

Which of the following best describes the output?

A.

The AS-Path is not present because a policy is configured on PE2 to set it to null.

B.

The AS-Path is not present because a policy is configured on CE1 to set it to null.

C.

The AS-Path is not present because a policy is configured on PE1 to set it to null.

D.

The AS-Path is not present because VPN-IPv4 routes do not propagate the IPv4 AS-Path BGP attribute.

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