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4A0-C02 Nokia SRA Composite Exam Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Nokia 4A0-C02 Nokia SRA Composite Exam 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 639 questions

Click the exhibit.

An Alcatel-Lucent 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?

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.

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.

Click the exhibit.

For the inter-AS model C VPRN, how many labels does PE1 push on a data packet received from CE1 and destined to CE2?

A.

1

B.

2

C.

3

D.

4

In a VPRN, how does the service provider ensure that customer addresses are unique when multiple customers use the same address space?

A.

It is the customer responsibility to ensure their address space is unique

B.

The Route Distinguisher ensures that addresses are unique between customers.

C.

The Route Target ensures that addresses are unique between customers

D.

The provider will advise the customers to change their addresses

E.

The provider will use NAT to ensure that addresses are unique between customers

Click the exhibit.

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

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.

At what point does the Route Target become associated with a route?

A.

When the route is first received at the P from the PE

B.

When the route from the CE is populated into the VRF at the PE

C.

When the route from the PE is populated into the VRF at the CE

D.

When the route is propagated from the PE to the CE

E.

When the route is exported into the MP-BGP table from the VRF

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?

A.

64496 64512

B.

64512

C.

64496

D.

64512 64496

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.

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.

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.

In a VPRN, what type of logical topology is required for the BGP sessions configured in the provider core?

A.

Full mesh between all CE, PE and P devices

B.

Full mesh between PE and P devices

C.

Full mesh of P devices

D.

Full mesh of PE devices

E.

Full mesh between PE and CE devices

On an Alcatel-Lucent 7750 SR, which CLI command displays the Route Target(s) associated to a prefix?

A.

Show router bgp routes

B.

Show router route-table summary

C.

Show router bgp routes vpn-ipv4 detail

D.

Show router route-table

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

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 Alcatel-Lucent 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.

Which of the following devices would typically have VRF instances?

A.

Any CE device

B.

Any PE device

C.

Any P device

D.

Any router in the service provider core

E.

Any customer router

Click the exhibit.

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 and BGP labels and swaps the VPN label.

C.

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

D.

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

Click the exhibit.

A Carrier Supporting Carrier (CSC) VPRN is configured on an Alcatel-Lucent 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

Click the exhibit.

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

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.

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?

A.

A

B.

B

C.

C

D.

D

Based on the VPRN BGP decision process, which of the following routes is selected first if the command "PE1>config>service>vprn> bgp best-path-selection as-path-ignore" is executed?

A.

The route learned from an eBGP peer.

B.

The route with the lowest Origin.

C.

The route with the lowest originator ID or BGP Identifier.

D.

The route with the shortest AS path.

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.

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.

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-CE1 pops the LDP label and pushes a BGP label.

C.

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

D.

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

Which of the following statements regarding egress FC and profile over-ride are TRUE? (Choose two)

A.

Packets can be classified into 16 different FCs when using priority mode queuing.

B.

This feature is available on egress SAPs within any service.

C.

MPLS EXP bits can be changed based on multi-field classification.

D.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, only the MF override parameters will take effect.

E.

If a Behavior Aggregate (BA) and Multi-field (MF) match occurs, the BA classification can override the forwarding class while the MF classification can override the profile.

Which of the following is NOT one of the four elements in the Nokia 7750 SR QoS solution'

A.

Marking/Remarking

B.

Classification

C.

Encapsulation

D.

Scheduling

What is the maximum number of forwarding subclasses a forwarding class can have?

A.

3

B.

64

C.

72

D.

16

E.

56

Which of the following are characteristics of 802.1p? (Choose two)

A.

802.1p adds 16 bits to the Layer 2 header,

B.

802.1p adds 16 bits to the Layer 3 header.

C.

802.1p specifies 64 different priority levels.

D.

802.1p uses a field in the 802.1Q header.

E.

802.1p uses a field in the Layer 3 IP header

F.

802.1p defines a 3-bit Class of Service field.

In which of the following scenarios is self-generated traffic QoS (sgt-QoS) useful?

A.

EXP markings on transit control traffic are not set correctly.

B.

The priority of all self-generated traffic needs to be lowered to allow all other traffic to take precedence.

C.

The priority of various control packets requires special treatment throughout the network.

D.

The BGP process is consuming too many CPU cycles and is impacting OSPF performance.

Which of the following statements are TRUE regarding the remarking of packets arriving on the network interface whose ToS-marking-state is set to trusted and remarking enabled on network egress? (Choose two)

A.

Native IP Packets will not be remarked.

B.

Native IP Packets will be remarked.

C.

Packets associated with a VPRN service on an upstream node will not be remarked.

D.

Packets associated with an ES service on an upstream node will be remarked.

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