PracticeVideosBlogFlashcardsEspañol
All Practice Exams

100+ Free Nokia VPRN Practice Questions

Pass your Nokia Virtual Private Routed Networks (4A0-106) exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately
Not published Pass Rate
100+ Questions
100% Free
1 / 100
Question 1
Score: 0/0

What is the recommended RD format when the assigning authority is an AS number?

A
B
C
D
to track
Same family resources

Explore More Nokia Service Routing Certifications

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

Nokia BGP for Internet Routing (4A0-102)

Practice Questions

Nokia BGP Fundamentals for Services (4A0-114)

Practice Questions

Nokia IS-IS Routing Protocol (4A0-112)

Practice Questions

Nokia MPLS (4A0-103)

Practice Questions

Nokia Network Routing Specialist I (NRS I, 4A0-100)

Practice Questions

Nokia Network Routing Specialist II (NRS II Composite Written + Lab)

Practice Questions
2026 Statistics

Key Facts: Nokia VPRN Exam

40

Exam Questions

Nokia 4A0-106 exam profile

90 min

Exam Duration

Nokia 4A0-106 exam profile

70%

Passing Score

Nokia SRC scoring policy

$125

Exam Fee (USD)

Pearson VUE Nokia pricing

Pearson VUE

Test Provider

Nokia SRC delivery partner

3 years

Credential Validity

Nokia SRC recertification policy

The Nokia VPRN exam (4A0-106) is a 40-question, 90-minute multiple-choice test delivered through Pearson VUE for $125 USD with a 70% passing score. Candidates are tested on VPRN architecture (RFC 4364 BGP/MPLS IP VPNs), route distinguishers and route targets, PE-CE routing protocols (static, OSPF, BGP, IS-IS, RIP), MP-BGP VPN-IPv4 NLRI encoding and extended communities, inter-AS VPN options (A/B/C), VPRN services including internet access, extranets, and shared services, and VPRN troubleshooting on Nokia 7750 SR OS. The credential is part of the Nokia Service Routing Certification program and is valid for three years.

Sample Nokia VPRN Practice Questions

Try these sample questions to test your Nokia VPRN exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What is the primary purpose of a VPRN (Virtual Private Routed Network) in a service provider network?
A.To provide Layer 3 VPN services allowing customer sites to communicate over a shared MPLS infrastructure
B.To provide Layer 2 transparent LAN services between customer sites
C.To encrypt all traffic between customer premises equipment
D.To assign dedicated physical circuits to each customer
Explanation: VPRN provides Layer 3 VPN services, enabling multiple customer sites to communicate as if they were on a private network, while sharing the provider's MPLS backbone infrastructure. It uses VRF instances on PE routers to maintain separation between customers.
2Which router type in an MPLS VPN architecture maintains VRF instances and connects directly to customer equipment?
A.PE (Provider Edge) router
B.P (Provider) core router
C.CE (Customer Edge) router
D.ASBR (Autonomous System Boundary Router)
Explanation: PE (Provider Edge) routers maintain VRF (Virtual Routing and Forwarding) instances and have direct connections to CE routers. The PE is responsible for encapsulating customer traffic into the MPLS backbone and exchanging VPN routes via MP-BGP with other PE routers.
3What is a VRF (Virtual Routing and Forwarding) instance?
A.A logical routing table that maintains separate forwarding information for each VPN customer on a PE router
B.A physical interface dedicated to a single customer
C.A protocol used to exchange routes between PE routers
D.A type of MPLS label used for traffic engineering
Explanation: A VRF instance is a logical routing table on a PE router that maintains separate forwarding information for each VPN customer. Each VRF has its own routing table, CEF (Forwarding Information Base), and associated interfaces, ensuring complete isolation between different VPN customers.
4What is the purpose of a Route Distinguisher (RD) in an MPLS VPN?
A.To make overlapping customer IP addresses unique when advertised via MP-BGP
B.To determine which routes are imported into a VRF
C.To encrypt customer traffic across the MPLS backbone
D.To establish LDP sessions between PE routers
Explanation: The Route Distinguisher (RD) is prepended to the customer's IPv4 prefix to create a unique VPN-IPv4 address. This ensures that overlapping IP address spaces from different customers remain distinct in the MP-BGP routing table. The RD does not influence route selection or import/export policies.
5What is the format of a VPN-IPv4 address in MP-BGP?
A.RD:IPv4-prefix (e.g., 65000:100:192.168.1.0/24)
B.IPv4-prefix:RD (e.g., 192.168.1.0/24:65000:100)
C.RT:IPv4-prefix (e.g., 100:1:192.168.1.0/24)
D.MPLS-label:IPv4-prefix (e.g., 12345:192.168.1.0/24)
Explanation: A VPN-IPv4 address consists of a Route Distinguisher (RD) prepended to the customer's IPv4 prefix in the format RD:IPv4-prefix. For example, 65000:100:192.168.1.0/24. This creates a globally unique address that can be carried in MP-BGP without ambiguity, even when customers use overlapping private address spaces.
6Which BGP address family is used to carry VPN-IPv4 routes between PE routers?
A.AFI=1, SAFI=128 (IPv4 VPN)
B.AFI=1, SAFI=1 (IPv4 Unicast)
C.AFI=2, SAFI=128 (IPv6 VPN)
D.AFI=1, SAFI=4 (IPv4 Labeled-Unicast)
Explanation: VPN-IPv4 routes are carried using MP-BGP with Address Family Identifier (AFI)=1 for IPv4 and Subsequent Address Family Identifier (SAFI)=128 for VPN (labeled VPN-IPv4). This address family allows BGP to carry both the VPN-IPv4 NLRI (with RD) and the associated MPLS label and extended communities (including Route Targets).
7What is the purpose of a Route Target (RT) in an MPLS VPN?
A.To control the import and export of VPN routes between VRF instances on different PE routers
B.To uniquely identify a customer's IP prefix in the BGP table
C.To allocate MPLS labels for forwarding customer traffic
D.To establish direct PE-to-PE tunnels
Explanation: Route Targets (RTs) are BGP extended community attributes that control which VPN routes are imported into and exported from VRF instances. A PE router attaches export RTs to routes it sends and imports routes carrying specific RTs into the appropriate VRFs. This mechanism provides flexible VPN topology control.
8In the Nokia (Alcatel-Lucent) SR OS, which command creates a VPRN service instance?
A.configure service vprn <service-id> customer <customer-id> create
B.configure vrf <vrf-name> create
C.configure mpls vpn <vpn-id> create
D.configure router vprn <service-id> create
Explanation: In Nokia SR OS, a VPRN service is created using the command 'configure service vprn <service-id> customer <customer-id> create'. The service-id uniquely identifies the VPRN instance, and the customer-id associates it with a specific customer. This creates the VRF context on the PE router.
9What are the two types of MPLS labels used in a VPRN data plane?
A.Transport label (outer) and VPN/service label (inner)
B.Route Distinguisher label and Route Target label
C.CE label and PE label
D.Ingress label and Egress label
Explanation: VPRN uses a two-label MPLS stack: the outer transport label (assigned by LDP or RSVP-TE) identifies the LSP to the egress PE router, and the inner VPN/service label (assigned by BGP) identifies the specific VRF and outgoing interface on the egress PE. This label stacking is fundamental to the MPLS VPN architecture.
10Which protocol is responsible for distributing the transport (outer) MPLS labels in a typical VPRN deployment?
A.LDP (Label Distribution Protocol)
B.MP-BGP
C.OSPF
D.RSVP-TE
Explanation: LDP (Label Distribution Protocol) is the most common protocol for distributing transport labels in MPLS VPN deployments. LDP builds Label Switched Paths (LSPs) between PE routers by assigning labels that correspond to the IGP routes. RSVP-TE can also be used for transport labels when traffic engineering is required.

About the Nokia VPRN Exam

The Nokia 4A0-106 VPRN exam is a Service Routing Certification (SRC) credential that validates intermediate-to-advanced knowledge of Virtual Private Routed Networks (Layer-3 VPN) architecture based on RFC 4364, PE-CE routing protocols, MP-BGP VPN-IPv4 route exchange, VPRN services including extranets and shared services, and VPRN operations and troubleshooting on Nokia 7750 SR routers running SR OS. It targets engineers who design, deploy, and operate Layer-3 VPN services in service-provider networks.

Assessment

40 multiple-choice questions covering VPRN fundamentals, VPRN routing (PE-CE and MP-BGP), VPRN services, and VPRN operations and troubleshooting on Nokia SR OS

Time Limit

90 minutes

Passing Score

70%

Exam Fee

$125 (Nokia / Pearson VUE)

Nokia VPRN Exam Content Outline

20%

VPRN Fundamentals

VPRN architecture based on RFC 4364 (BGP/MPLS IP VPNs), PE-CE physical and logical connectivity models, VPN-IPv4 address family (RD prepended IPv4), route distinguishers (RD Types 0/1/2), route targets (RT) for import/export control, VRF table separation on PE routers, MPLS label stack for VPN traffic (outer transport label + inner VPN/service label), and the Nokia SR OS VPRN service model with configure service vprn.

30%

VPRN Routing

PE-CE routing protocols: static routes, OSPF (RFC 4577 sham-links, domain-id), BGP (CE-PE EBGP), IS-IS, and RIP; MP-BGP VPN-IPv4 (AFI 1, SAFI 128) NLRI encoding with RD and IP-prefix; extended communities (route-target, origin, OSPF domain-id, BGP extended communities); RT import/export policy configuration; route distinguisher allocation strategies; MP-BGP session setup between PE routers; and inter-AS VPN Option A (VRF-to-VRF), Option B (single-hop MP-EBGP VPN-IPv4), and Option C (multi-hop MP-EBGP with labeled unicast) on Nokia SR OS.

30%

VPRN Services

Internet access from a VPRN (static default route, full routing table, policy-based forwarding), shared services (centralized firewall, NAT, DNS via route leaking), VPRN-to-VPRN extranet connectivity (overlapping RT import/export), VPRN-to-VPLS extranet (Layer-3 to Layer-2 interworking), VPRN multihoming with redundant PE connections, hub-and-spoke VPRN topology with RT design, carrier-of-carriers VPN architecture, and Nokia SR OS service chaining with integrated services.

20%

VPRN Operations and Troubleshooting

VPRN service verification (show service id, show router <vprn-id> interface/route-table/protocol), MP-BGP VPN route propagation debugging (show router bgp routes vpn-ipv4), MPLS label verification for VPN traffic (show router mpls forwarding), ping and traceroute within VPRN contexts (oam vprn-ping), SDP and service binding verification, and Nokia 7750 SR operational workflows for VPRN incident troubleshooting.

How to Pass the Nokia VPRN Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: 40 multiple-choice questions covering VPRN fundamentals, VPRN routing (PE-CE and MP-BGP), VPRN services, and VPRN operations and troubleshooting on Nokia SR OS
  • Time limit: 90 minutes
  • Exam fee: $125

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Nokia VPRN Study Tips from Top Performers

1Master the three RD types: Type 0 (2-byte AS + 4-byte number), Type 1 (IPv4 address + 2-byte number), Type 2 (4-byte AS + 2-byte number) - know how each formats the VPN-IPv4 prefix.
2Understand RT import/export design patterns: hub-and-spoke uses different RTs for hub-to-spoke vs spoke-to-hub; extranets use overlapping RT imports from multiple VPRNs.
3Drill inter-AS VPN options: Option A (back-to-back VRF, simple but scales poorly), Option B (ASBR does VPN-IPv4 redistribution, next-hop-self), Option C (multi-hop MP-EBGP with labeled unicast, best scaling).
4Know PE-CE OSPF sham-links (RFC 4577) and domain-id extended community - they prevent back-door links from being preferred over the MPLS VPN backbone.
5Practice Nokia SR OS VPRN configuration: configure service vprn <id> customer <id> with interface, route-distinguisher, route-target import/export, and protocol configuration.
6Be fluent in troubleshooting commands: show router <vprn-id> route-table, show router bgp routes vpn-ipv4 rd <rd> <prefix>, and show router mpls forwarding for verifying the label stack.
7Understand the VPN label assignment models (per-prefix vs per-VRF) and their trade-offs in scaling vs convergence.

Frequently Asked Questions

What is on the Nokia 4A0-106 VPRN exam?

The Nokia 4A0-106 exam tests VPRN architecture (RFC 4364 BGP/MPLS IP VPNs), route distinguishers and route targets, PE-CE routing protocols (static, OSPF, BGP, IS-IS, RIP), MP-BGP VPN-IPv4 NLRI encoding and extended communities, inter-AS VPN options (A/B/C), VPRN services including internet access, extranets, shared services, hub-and-spoke, and carrier-of-carriers, and VPRN troubleshooting on Nokia 7750 SR routers running SR OS. It is part of the Nokia Service Routing Certification (SRC) program and is required for the SRA track.

How long is the Nokia VPRN exam and how many questions does it have?

The 4A0-106 exam contains 40 multiple-choice questions with a 90-minute time limit. Nokia recommends pacing at roughly 2 minutes per question and saving a few minutes at the end to flag and review uncertain answers.

What is the passing score for Nokia 4A0-106?

Nokia requires a 70% score (28 of 40 correct) to pass the VPRN exam. Aim for 85% or higher in practice exams - MP-BGP VPN-IPv4 NLRI structure, RD/RT interaction, and inter-AS Option B label handling are common stumbling blocks.

How much does the Nokia 4A0-106 VPRN exam cost?

The 4A0-106 exam fee is $125 USD per attempt, paid to Pearson VUE at registration. Optional Nokia self-paced or instructor-led VPRN training is sold separately and is not required to sit the exam.

How long is the Nokia VPRN credential valid?

Nokia SRC credentials, including the VPRN exam, are valid for three years. To stay current, candidates must pass any current Nokia SRC exam within the three-year window or recertify by retaking 4A0-106.

What is the difference between VPRN and VPLS on Nokia SR OS?

VPRN (4A0-106) is a Layer-3 VPN service where the PE router participates in customer routing using VRF tables and MP-BGP VPN-IPv4, while VPLS (4A0-105) is a Layer-2 VPN service that emulates a LAN segment using pseudowires and MAC learning. VPRN supports any PE-CE routing protocol; VPLS is transparent to customer routing.