100+ Free Nokia 4A0-113 OSPF Practice Questions

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Question 1

Score: 0/0

Which Nokia SR OS feature redistributes static or BGP routes into OSPF?

import-policy

export-policy applied under configure router ospf

OSPF area range

policy-options community-list

to track

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2026 Statistics

Key Facts: Nokia 4A0-113 OSPF Exam

Exam Questions

Multiple-choice format

70%

Passing Score

~28 of 40 correct

90 min

Time Limit

Pearson VUE delivery

$125

Exam Fee

Per attempt

RFC 2328

OSPFv2 Standard

RFC 5340 for OSPFv3

Pearson VUE

Test Delivery

In-person or online proctored

The Nokia 4A0-113 OSPF Routing Protocol exam is a 90-minute, 40-question, multiple-choice test with a 70% passing score and a $125 USD fee, delivered through Pearson VUE. It validates OSPFv2 (RFC 2328) and OSPFv3 (RFC 5340) knowledge plus operational fluency on Nokia 7750 SR OS, including LSAs, area design, virtual links, NSSA, BFD, LDP-IGP sync, and Segment Routing/Flex-Algo extensions. The exam is part of the Nokia Service Routing Certification (SRC) program and pairs naturally with NRS I (4A0-100) and the BGP exam (4A0-114) on the path toward the NRS II credential.

Sample Nokia 4A0-113 OSPF Practice Questions

Try these sample questions to test your Nokia 4A0-113 OSPF exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which RFC defines OSPFv2 for IPv4?

A.RFC 1247

B.RFC 2328

C.RFC 5340

D.RFC 4271

Explanation: RFC 2328 (April 1998) is the current standard that defines OSPF Version 2 for IPv4. It supersedes earlier OSPF specifications such as RFC 1583 and RFC 1247.

2Which RFC defines OSPFv3 for IPv6?

A.RFC 2328

B.RFC 5340

C.RFC 4577

D.RFC 8200

Explanation: RFC 5340 defines OSPF for IPv6 (OSPFv3). It updates the original OSPFv3 specification (RFC 2740) and introduces address families that can also carry IPv4 prefixes.

3OSPF runs directly over which IP protocol number?

A.6

B.17

C.89

D.47

Explanation: OSPF is encapsulated directly in IP using protocol number 89. It does not use TCP or UDP, which is why OSPF implements its own reliability mechanism (acknowledgements via LSAck packets and retransmission timers).

4How many distinct OSPF packet types are defined in RFC 2328?

A.3

B.4

C.5

D.6

Explanation: OSPF defines 5 packet types: Hello (Type 1), Database Description / DBD (Type 2), Link State Request / LSR (Type 3), Link State Update / LSU (Type 4), and Link State Acknowledgement / LSAck (Type 5).

5Which OSPF packet type is used to discover and maintain neighbor relationships?

A.Hello (Type 1)

B.DBD (Type 2)

C.LSR (Type 3)

D.LSU (Type 4)

Explanation: Hello packets discover neighbors, negotiate parameters, and act as a keepalive to maintain the adjacency. They are sent periodically on every OSPF-enabled interface (default 10 seconds on broadcast/point-to-point).

6What is the default OSPF Hello interval on a broadcast or point-to-point interface?

A.5 seconds

B.10 seconds

C.30 seconds

D.60 seconds

Explanation: The default Hello interval on broadcast and point-to-point links is 10 seconds. The matching default Dead interval is 4 times the Hello interval, or 40 seconds.

7By default, what is the Dead interval on a broadcast OSPF interface?

A.10 seconds

B.20 seconds

C.30 seconds

D.40 seconds

Explanation: RFC 2328 defines the default Router Dead Interval as 4 times the Hello interval. On broadcast/point-to-point links the Hello interval defaults to 10 seconds, giving a Dead interval of 40 seconds.

8Which two values MUST match in OSPF Hello packets between neighbors for an adjacency to form? (Choose the BEST single answer.)

A.Router-ID and IP address

B.Hello/Dead intervals and Area ID

C.Cost and reference bandwidth

D.Priority and DR address

Explanation: OSPF requires Hello/Dead timers, Area ID, authentication, network mask (on broadcast links), and stub-area flag to match. Mismatched timers or Area IDs are by far the most common cause of stuck-in-Init or no-neighbor issues.

9Which OSPF packet type carries summaries of LSAs during initial database synchronization?

A.Hello

B.Database Description (DBD)

C.Link State Request (LSR)

D.Link State Acknowledgement (LSAck)

Explanation: DBD (Type 2) packets are exchanged in the ExStart and Exchange states. They contain LSA headers (summaries) so each neighbor can determine which LSAs it is missing or has older copies of.

10In which neighbor state are DBD packets first exchanged so master/slave is determined?

A.Init

B.2-Way

C.ExStart

D.Loading

Explanation: ExStart is the first state of the database exchange. Routers send empty DBDs to negotiate master/slave roles (highest Router-ID becomes master) and the initial DD sequence number before transitioning to Exchange.

About the Nokia 4A0-113 OSPF Exam

The Nokia OSPF Routing Protocol exam (4A0-113) validates the candidate's ability to deploy and operate OSPF on Nokia 7750 SR OS routers. It covers OSPFv2 (RFC 2328) for IPv4 and OSPFv3 (RFC 5340) for IPv6, the 5 OSPF packet types and 7 neighbor states, DR/BDR election on broadcast and NBMA networks, every LSA type from 1 (Router) through 11 (AS-scoped Opaque), reliable flooding and SPF computation, multi-area design with stub/NSSA/totally stubby/totally NSSA variants, virtual links, route summarization with `area range` and `summary-address`, and modern extensions including OSPF-TE (RFC 3630), Segment Routing (RFCs 8665 and 8666), and Flex-Algo (RFC 9350). Candidates must also be comfortable with Nokia SR OS CLI, BFD integration, LDP-IGP synchronization, and OSPF show-command troubleshooting.

Assessment

40 multiple-choice questions covering OSPF fundamentals (RFC 2328 OSPFv2 and RFC 5340 OSPFv3), adjacencies and areas, the LSDB and SPF computation, and OSPF on Nokia 7750 SR OS

Time Limit

90 minutes

Passing Score

70%

Exam Fee

$125 (Nokia / Pearson VUE)

Nokia 4A0-113 OSPF Exam Content Outline

25%

OSPF Fundamentals

OSPFv2 (RFC 2328) vs OSPFv3 (RFC 5340), IP protocol 89, 5 packet types Hello/DBD/LSR/LSU/LSAck, default Hello 10s and Dead 40s, Router-ID, AllSPFRouters/AllDRouters multicast, reference bandwidth and cost, authentication including HMAC-SHA (RFC 5709) and OSPFv3 IPsec/RFC 7166, address families (RFC 5838)

25%

Adjacencies and Areas

Neighbor states Down to Full, DR/BDR election (highest priority, then highest Router-ID, non-preemptive, priority 0 ineligible), interface types broadcast/P2P/NBMA/P2MP/virtual-link, area 0 backbone, ABR vs ASBR, stub/totally stubby/NSSA/totally NSSA, virtual links, passive interfaces

25%

LSDB and SPF

LSA types 1 Router, 2 Network, 3 Summary, 4 ASBR Summary, 5 External, 7 NSSA External, 9/10/11 Opaque (RFC 5250), reliable LSU/LSAck flooding, LS Sequence Number, LSA Age (MaxAge 3600 / LSRefresh 1800), Dijkstra and incremental/partial SPF, route preference, area range and summary-address, OSPF-TE (RFC 3630), Segment Routing (RFCs 8665 and 8666), Flex-Algo (RFC 9350), graceful restart (RFC 3623/5187), stub router (RFC 6987)

25%

OSPF on Nokia SR OS

`configure router ospf` and `configure router ospfv3`, area and interface attachment, network-type and priority, passive interfaces, reference bandwidth, BFD enable, LDP-IGP sync, ECMP, export policy redistribution, NSSA and totally stubby configuration, summary commands, and `show router ospf neighbor/database/interface/statistics/routes/area`

How to Pass the Nokia 4A0-113 OSPF Exam

What You Need to Know

Passing score: 70%
Assessment: 40 multiple-choice questions covering OSPF fundamentals (RFC 2328 OSPFv2 and RFC 5340 OSPFv3), adjacencies and areas, the LSDB and SPF computation, and OSPF on Nokia 7750 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 4A0-113 OSPF Study Tips from Top Performers

1Memorize the 5 OSPF packet types in order (Hello, DBD, LSR, LSU, LSAck) and the 7 neighbor states (Down, Init, 2-Way, ExStart, Exchange, Loading, Full) — both appear in nearly every troubleshooting scenario

2Lock in the default timers: Hello = 10s and Dead = 40s on broadcast/P2P; Hello = 30s on NBMA/P2MP. The Dead = 4 x Hello relationship and the requirement for both ends to match are tested directly

3Build a quick-reference table for LSA types 1, 2, 3, 4, 5, 7, 9, 10, 11 with originator and flooding scope; map area types (standard/stub/totally stubby/NSSA/totally NSSA) to which LSAs they allow

4Practice DR/BDR election rules until they are second nature: highest priority then highest Router-ID, non-preemptive, priority 0 = ineligible, no DR on point-to-point

5Get hands-on with Nokia SR OS using the GNS3, EVE-NG, or Nokia VSR images and run every `show router ospf` command (neighbor, database, interface, statistics, routes, area) until you can read each output cold

6Cover modern extensions: RFC 5709 HMAC-SHA, RFC 7166 OSPFv3 auth trailer, RFC 3623/5187 graceful restart, RFC 6987 stub router, RFC 8665/8666 Segment Routing, and RFC 9350 Flex-Algo — they show up as the harder questions

Frequently Asked Questions

What does the Nokia 4A0-113 OSPF exam cover?

The 4A0-113 exam covers OSPF fundamentals from RFC 2328 (OSPFv2 for IPv4) and RFC 5340 (OSPFv3 for IPv6), the 5 OSPF packet types and 7 neighbor states, DR/BDR election, every OSPF LSA type, multi-area design with stub/NSSA/totally stubby/totally NSSA variants, virtual links, route summarization, and OSPF configuration and troubleshooting on Nokia 7750 SR OS, including BFD, LDP-IGP sync, and modern Segment Routing/Flex-Algo extensions.

How many questions are on the Nokia 4A0-113 exam and what is the passing score?

The 4A0-113 exam contains 40 multiple-choice questions delivered in 90 minutes through Pearson VUE. The passing score is 70%, which means roughly 28 of 40 questions must be answered correctly. Questions are weighted approximately evenly across OSPF fundamentals, adjacencies and areas, the LSDB and SPF, and OSPF on Nokia SR OS.

How much does the Nokia 4A0-113 exam cost?

The 4A0-113 exam fee is $125 USD per attempt, paid to Pearson VUE at the time of scheduling. Nokia partners and Nokia training students may receive vouchers or discounted rates. Retake fees follow Pearson VUE policy and the standard Nokia SRC retake schedule published on the Nokia training site.

What is the difference between OSPFv2 and OSPFv3?

OSPFv2 (RFC 2328) carries IPv4 prefixes; OSPFv3 (RFC 5340) carries IPv6 by default and IPv4 via address families per RFC 5838. OSPFv3 separates topology from addressing using the Type 8 Link LSA and Type 9 Intra-Area Prefix LSA, sources packets from IPv6 link-local addresses, and removes the protocol-native authentication fields, relying on IPsec or the RFC 7166 authentication trailer instead.

How does OSPF elect a Designated Router on a broadcast network?

On broadcast and NBMA networks, the router with the highest interface OSPF priority becomes DR. If priorities tie, the router with the highest Router-ID wins. The election is non-preemptive: when a higher-priority router joins later it does not displace the existing DR. Setting priority to 0 makes a router ineligible for DR/BDR roles.

When should I use a stub area, NSSA, or totally stubby area in OSPF design?

Stub areas drop Type 4 and Type 5 LSAs and replace them with a default route, useful for branch sites with no external redistribution. Totally stubby areas additionally drop Type 3 LSAs for maximum LSDB reduction. NSSAs allow local Type 7 redistribution, which the ABR translates to Type 5 toward the backbone, useful when a branch must redistribute static or BGP routes into OSPF without exposing external LSAs to the rest of the area.

How do I prepare for the Nokia 4A0-113 exam?

Prepare by reading RFC 2328 and RFC 5340, taking Nokia's SRC OSPF training, and getting hands-on time with Nokia 7750 SR OS using `configure router ospf`, `configure router ospfv3`, and the `show router ospf` family of commands. Practice multi-area designs with stub/NSSA/totally stubby variants, virtual links, BFD, LDP-IGP sync, and Segment Routing/Flex-Algo extensions, then validate with free practice exams before scheduling through Pearson VUE.

100+ Free Nokia 4A0-113 OSPF Practice Questions

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