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100+ Free Nokia BGP for Internet Routing Practice Questions

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How many BGP path attributes are classified as well-known mandatory?

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2026 Statistics

Key Facts: Nokia BGP for Internet Routing Exam

40

Exam Questions

Nokia 4A0-102 exam profile

90 min

Exam Duration

Nokia 4A0-102 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 BGP for Internet Routing exam (4A0-102) 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 BGP fundamentals (RFC 4271), path attributes (ORIGIN, AS_PATH, NEXT_HOP, LOCAL_PREF, MED, COMMUNITY), policy control with route policies and prefix-lists, scaling with route reflection (RFC 4456) and confederations (RFC 5065), BGP security with RPKI (RFC 6811) and route leak mitigation, and Nokia 7750 SR OS BGP configuration and troubleshooting. The credential is part of the Nokia Service Routing Certification program and is valid for three years.

Sample Nokia BGP for Internet Routing Practice Questions

Try these sample questions to test your Nokia BGP for Internet Routing 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 BGP in Internet routing?
A.To exchange routing information between autonomous systems
B.To provide fast convergence within a single data center
C.To replace OSPF as an interior gateway protocol
D.To assign IP addresses dynamically to hosts
Explanation: BGP (Border Gateway Protocol) is the exterior gateway protocol designed to exchange routing and reachability information between autonomous systems (AS) on the Internet.
2Which transport protocol and port number does BGP use for session establishment?
A.TCP port 179
B.UDP port 179
C.TCP port 80
D.UDP port 53
Explanation: BGP uses TCP port 179 as its transport protocol, providing reliable, connection-oriented communication between BGP peers.
3What is an Autonomous System (AS) in the context of BGP?
A.A collection of IP networks under the control of a single organization that presents a common routing policy
B.A single router running BGP
C.A group of switches in a data center fabric
D.A subnet mask used for route aggregation
Explanation: An Autonomous System is a collection of connected IP routing prefixes under the control of one or more network operators on behalf of a single administrative entity, presenting a common, clearly defined routing policy to the Internet.
4What is the difference between eBGP and iBGP?
A.eBGP runs between different autonomous systems, while iBGP runs within the same autonomous system
B.eBGP uses UDP, while iBGP uses TCP
C.eBGP is for IPv6 only, while iBGP is for IPv4 only
D.eBGP supports fewer route types than iBGP
Explanation: External BGP (eBGP) is used to exchange routes between BGP peers in different autonomous systems, while Internal BGP (iBGP) is used to exchange routes within the same autonomous system.
5What is the default Time-to-Live (TTL) value set by eBGP for its packets?
A.1
B.64
C.255
D.128
Explanation: eBGP sets the TTL to 1 by default because eBGP peers are typically directly connected. This prevents BGP packets from being forwarded beyond the directly connected neighbor.
6What is the default TTL value for iBGP packets?
A.255
B.1
C.64
D.128
Explanation: iBGP sets the TTL to 255 by default because iBGP peers can be multiple hops away within the same autonomous system, requiring the packets to traverse internal routers.
7Which BGP message type is sent immediately after the TCP session is established?
A.OPEN message
B.UPDATE message
C.NOTIFICATION message
D.KEEPALIVE message
Explanation: After the TCP connection is established, the first BGP message sent is the OPEN message, which is used to exchange version, AS number, hold time, and BGP identifier information between peers.
8What is the purpose of a BGP KEEPALIVE message?
A.To maintain the BGP session when no UPDATE messages are being exchanged
B.To advertise new routes to a peer
C.To notify a peer of an error condition
D.To tear down the BGP session gracefully
Explanation: KEEPALIVE messages are sent to confirm that the BGP session is still active. They are exchanged at intervals of one-third of the hold time to prevent session timeout when no UPDATE messages are being sent.
9How many BGP path attributes are classified as well-known mandatory?
A.3
B.2
C.4
D.5
Explanation: There are three well-known mandatory path attributes: ORIGIN, AS_PATH, and NEXT_HOP. Every BGP UPDATE message must include these attributes.
10Which of the following is NOT a well-known mandatory BGP path attribute?
A.LOCAL_PREF
B.ORIGIN
C.AS_PATH
D.NEXT_HOP
Explanation: LOCAL_PREF is a well-known discretionary attribute, not mandatory. The three well-known mandatory attributes are ORIGIN, AS_PATH, and NEXT_HOP.

About the Nokia BGP for Internet Routing Exam

The Nokia 4A0-102 BGP for Internet Routing exam is a Service Routing Certification (SRC) credential that validates intermediate-level knowledge of Border Gateway Protocol architecture, path attributes and policy control, BGP scaling with route reflection and confederations, BGP security with RPKI and route leak detection, and the implementation of these features on Nokia 7750 SR routers running SR OS. It targets engineers who design, deploy, and operate BGP-based Internet routing for service-provider networks.

Assessment

40 multiple-choice questions covering BGP overview, BGP attributes and policies, BGP scaling techniques, and BGP security and troubleshooting on Nokia SR OS

Time Limit

90 minutes

Passing Score

70%

Exam Fee

$125 (Nokia / Pearson VUE)

Nokia BGP for Internet Routing Exam Content Outline

20%

BGP Overview

BGP fundamentals (RFC 4271), BGP message types (OPEN, UPDATE, NOTIFICATION, KEEPALIVE, ROUTE-REFRESH), finite state machine, EBGP vs IBGP adjacency rules, 2-byte and 4-byte AS numbering (RFC 6793), NLRI encoding, and the Nokia SR OS BGP decision process with its 16+ comparison steps.

30%

BGP Attributes and Policies

Well-known mandatory attributes (ORIGIN, AS_PATH with AS_SEQUENCE/AS_SET/AS_CONFED_SEQUENCE/AS_CONFED_SET, NEXT_HOP), well-known discretionary (LOCAL_PREF, ATOMIC_AGGREGATE), optional transitive (COMMUNITY with well-known communities like no-export/no-advertise/local-as, AGGREGATOR), optional non-transitive (MED, ORIGINATOR_ID, CLUSTER_LIST), route policy construction, prefix-lists, community-lists, AS-path regex matching, and route damping with Nokia SR OS suppress/reuse/half-life parameters.

25%

BGP Scaling

BGP route reflection (RFC 4456) with originator-id and cluster-list loop prevention, route reflector cluster design (full-mesh within cluster), BGP confederations (RFC 5065) with member-AS and confederation-AS, BGP peer groups and update groups for efficient update generation, EBGP and IBGP multipath for load balancing, BGP ADD-PATH (RFC 7911) for advertising multiple paths, BGP graceful restart (RFC 4724), and BGP session security (TCP MD5 signatures, GTSM/TTL-security RFC 5082).

25%

BGP Security and Troubleshooting

RPKI and BGP Origin Validation (RFC 6811) with valid/invalid/not-found validation states, BGPsec signing concepts, route leak detection and mitigation (RFC 7908 route-leak types), BGP Flowspec (RFC 5575) for distributed filtering, BGP Monitoring Protocol (BMP, RFC 7854), and Nokia SR OS operational commands including show router bgp summary / neighbor / routes / policy for verification and troubleshooting.

How to Pass the Nokia BGP for Internet Routing Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: 40 multiple-choice questions covering BGP overview, BGP attributes and policies, BGP scaling techniques, and BGP security 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 BGP for Internet Routing Study Tips from Top Performers

1Memorize the full BGP attribute classification table: well-known mandatory (ORIGIN, AS_PATH, NEXT_HOP), well-known discretionary (LOCAL_PREF, ATOMIC_AGGREGATE), optional transitive (COMMUNITY, AGGREGATOR), and optional non-transitive (MED, ORIGINATOR_ID, CLUSTER_LIST).
2Master the Nokia SR OS BGP decision process order - it differs subtly from Cisco and Juniper in tie-breaking steps, which is a frequent exam trap.
3Know the route reflection rules cold: originator-id is set by the first RR, cluster-list is prepended at each reflection hop, and both prevent loops without requiring full-mesh IBGP.
4Drill RPKI validation states (valid, invalid, not-found) and how Nokia SR OS applies import policies based on validation results.
5Practice AS-path regex syntax for Nokia SR OS - regular expressions like ^200_ .*_300$ for matching AS_PATH patterns are commonly tested.
6Understand the difference between EBGP multihop (TTL=1 default) and IBGP (TTL=255), and how GTSM/TTL-security modifies this behavior.
7Be fluent in Nokia troubleshooting commands: show router bgp summary, show router bgp neighbor <ip> advertised-routes/received-routes, and show router bgp routes route-type external/internal.

Frequently Asked Questions

What is on the Nokia 4A0-102 BGP for Internet Routing exam?

The Nokia 4A0-102 exam tests BGP fundamentals (RFC 4271), BGP path attributes and policy control (ORIGIN, AS_PATH, NEXT_HOP, LOCAL_PREF, MED, COMMUNITY), BGP scaling with route reflection (RFC 4456) and confederations (RFC 5065), BGP security with RPKI (RFC 6811) and route leak mitigation, and the implementation of BGP on Nokia 7750 SR routers running SR OS classic CLI. It is part of the Nokia Service Routing Certification (SRC) program and is required for the SRA track.

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

The 4A0-102 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 4A0-102?

Nokia requires a 70% score (28 of 40 correct) to pass the BGP for Internet Routing exam. Aim for 85% or higher in practice exams - BGP attribute interaction, route reflection topology rules, and RPKI validation states are common stumbling blocks.

How much does the Nokia 4A0-102 BGP exam cost?

The 4A0-102 exam fee is $125 USD per attempt, paid to Pearson VUE at registration. Optional Nokia self-paced or instructor-led BGP training is sold separately and is not required to sit the exam.

How long is the Nokia BGP credential valid?

Nokia SRC credentials, including the BGP for Internet Routing 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 4A0-102.

Where do I take the Nokia BGP exam?

The 4A0-102 exam is delivered by Pearson VUE either at a Pearson VUE test center or via OnVUE online proctoring, where available. Schedule through pearsonvue.com/us/en/nokia.html with your Nokia candidate profile.