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4A0-106 Nokia Virtual Private Routed Networks Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-106 Nokia Virtual Private Routed Networks certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 214 questions

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.

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

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?

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.

On a PE router, the VRF table for VPRN 10 contains: one local route, two BGP routes learned from a local CE. and three tunneled routes learned from a remote site. If we execute the command "configure service vprn 10 maximum-routes 2 log-only" on this PE router, how many routes are expected to be in the VRF?

A.

Five routes: the local route, the two BGP routes learned from the local CE, and two tunneled routes.

B.

Six routes: the local route, the two BGP routes learned from the local CE, and three tunneled routes.

C.

Two routes: the local route and one tunneled route.

D.

Three routes: the local route and two tunneled routes.

E.

Two routes: the local route and one BGP route learned from the local CE.

Click the exhibit.

What is wrong with the VPRN configuration applied on this Nokia 7750 SR?

A.

The VPRN ID must match the value used in the vrf-target command.

B.

The VPRN ID must match the value used in the route-distinguisher command.

C.

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

D.

The "no shutdown" command must be configured for the VPRN to be operationally UP.

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

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.

Click the exhibit.

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.

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is an Internet Service Provider (ISP). If CE1 sends an IP packet to 192.60.100.1, which of the following is FALSE?

A.

PE1 pushes an LDP transport label.

B.

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

C.

CSC-PE2 pops the MPLS transport label and pushes a BGP label.

D.

CSC-CE2 pops the BGP label and pushes an LDP transport label.

Click the exhibit.

One Route Distinguisher is assigned per VRF. If CE1 and CE2 advertise prefix 10.1.1.0/24, which of the following statements is FALSE?

A.

PE1 and PE2 advertise the same VPN route to the route reflector.

B.

The route reflector receives two routes for prefix 10.1.1.0/24; one from PE1 and one from PE2.

C.

The route reflector reflects two routes for prefix 10.1.1.0/24.

D.

PE3 receives two routes and is able to load balance traffic across PE1 and PE2.

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

A.

CSC does not allow a customer carrier to offer Layer 2 services to its end customers.

B.

A CSC VPRN is configured on the network provider's CSC-PE routers.

C.

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

D.

The network provider provides an MPLS VPN backbone to the customer carrier.

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?

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.

Which of the following about the Route Target is TRUE?

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.

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

A.

When the P receives the route from the PE.

B.

When the PE populates the route received from the CE into the VRF.

C.

When the PE propagates the route to the CE.

D.

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

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?

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

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.

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

A.

VPRN

B.

BGP/MPLS VPN

C.

VLL

D.

VPLS

E.

IP-VPN

F.

ePipe

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.

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

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

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

Click the exhibit.

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

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

A.

End-customer routes are populated in the network provider CSC VRF.

B.

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

C.

The network provider learns customer carrier PE system addresses.

D.

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

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