- What "Passing" Means for 4A0-100
- What Is and Is Not Published About the Score
- The Format You Are Actually Scored Against
- Six Modules, One Exam: Where Points Come From
- Setting Your Own Readiness Benchmark
- Scheduling, Fees, and the Appointment Clock
- Sequencing Your Prep by Module
- The 2027 Exam Revision Window
- Who Values This Credential
- Frequently Asked Questions
- NRS I is earned through one mandatory exam: 4A0-100 IP Networks and Services Fundamentals, 40 multiple-choice questions in 90 minutes.
- No current pass threshold, scored/unscored split, or pass rate is established in the sources reviewed, so beware of any site quoting an exact cutoff.
- The six topic modules are an issuer-designated outline, not weighted domains, so study all six evenly.
- The appointment runs 110 minutes, but 20 of those are an introductory survey, not exam time.
What "Passing" Means for 4A0-100
Search for the NRS I passing score and you will find confident numbers. Treat them with suspicion. Nokia Network Routing Specialist I is earned by passing a single mandatory exam, 4A0-100 IP Networks and Services Fundamentals, and this article reports only what the issuer's pages support rather than recycling a cutoff from some other credential that happens to share the "NRS I" abbreviation.
That distinction matters. Several unrelated certifications use the same acronym, and their scoring rules, fees, and domain weights have nothing to do with Nokia's program. Everything below applies only to the Nokia exam. For a broader orientation to the credential itself, see What Is NRS I Certification? and NRS I Requirements 2026: Eligibility, Prerequisites & How to Qualify.
What Is and Is Not Published About the Score
It helps to separate three categories of information: what is confirmed, what is not established, and what you should never assume.
| Item | Status for NRS I (4A0-100) |
|---|---|
| Exam code and title | Confirmed: 4A0-100 IP Networks and Services Fundamentals |
| Question count | Confirmed: 40 questions |
| Exam duration | Confirmed: 90 minutes |
| Question type | Confirmed: multiple choice |
| Exam fee | Confirmed: USD 125 (training is priced separately) |
| Numeric pass threshold | Not established in sources reviewed |
| Scored versus unscored split | Not established in sources reviewed |
| Published pass rate | Not established in sources reviewed |
| Domain weighting | Not applicable: modules are unweighted topic headings |
If you want to dig into the difficulty side of this, NRS I Pass Rate 2026: What the Data Shows covers what can and cannot be said about outcomes, and How Hard Is the NRS I Exam? Complete Difficulty Guide 2026 frames the challenge qualitatively.
Why you should be wary of quoted cutoffs
Third-party pages often state a specific percentage or scaled score as fact. Without a primary-source statement from Nokia, such figures are guesses at best and imported from another vendor's exam at worst. Do not build a study plan around a number you cannot trace back to the issuer.
The Format You Are Actually Scored Against
Even without a published cutoff, the mechanics of the exam tell you how to approach it. The facts are straightforward:
- One exam: 4A0-100 is the single mandatory exam for the NRS I certification. No mandatory exam prerequisite is listed.
- 40 multiple-choice questions in 90 minutes, which works out to roughly two minutes and fifteen seconds per question if you spread your time evenly.
- 110-minute appointment: the session includes a 20-minute introductory survey. That survey is not exam time, so do not mistake the appointment length for your testing window.
- No lab component: NRS I is a multiple-choice exam. Do not infer the lab or composite requirements associated with NRS II or SRA; those belong to other Nokia credentials and do not apply here.
Six Modules, One Exam: Where Points Come From
Nokia lists six candidate exam-topic modules for 4A0-100. These are an issuer-designated preparation outline. They are not weighted examination domains, and Nokia does not present them as an exhaustive blueprint. In practice, that means you cannot safely skip a module on the theory that it is "low weight." For a deeper walk-through, read NRS I Exam Domains 2026: Complete Guide to All 6 Content Areas.
Introduction to Networking and Services
The conceptual foundation for everything else.
- Protocol-layer models and how layers relate
- Encapsulating and decapsulating traffic as it moves through the stack
- Separating control from forwarding, a theme that returns in routing and services
Service Router Components and Command Line Interface
Where Nokia-specific knowledge lives.
- The service-router product range and the 7750SR hardware
- The router boot sequence
- Operating and configuring SR OS; the current course uses model-driven CLI (MD-CLI)
Ethernet
Link-layer behavior that underpins both routing and services.
- Access to shared media, and hub versus switch behavior
- Link-layer addressing and frame structure
- VLAN segmentation and redundant Ethernet
The Internet Layer
Likely the most calculation-heavy module.
- IPv4 addressing, subnetting, and summarizing routes
- 7750SR layer 3 interfaces
- Forwarding decisions and packet-header fields
- Residential and small-business connectivity
IP Routing Protocol Basics
Static versus dynamic routing and the protocols that make dynamic routing work.
- Static route configuration
- OSPF fundamentals
- BGP introduction
- Internet building blocks
Services Overview
The capstone: how routers deliver customer-facing services.
- VPN concepts and the elements of a VPN service
- MPLS tunnel transport and distributing labels with LDP
- VPWS, VPLS, and VPRN configuration
Setting Your Own Readiness Benchmark
Since there is no verified cutoff to aim at, you need an internal standard. A sensible one for this exam is consistent competence across all six modules rather than strength in a few. Because the modules are unweighted and the outline is not claimed to be exhaustive, a lopsided strategy is risky.
A practical self-check
Before you book, you should be able to do the following without notes:
- Walk a packet through encapsulation and decapsulation, naming what changes at each layer.
- Subnet an IPv4 block and summarize contiguous routes into a single advertisement.
- Explain why a switch and a hub behave differently when a frame arrives, and what a VLAN changes.
- Describe the difference between a static route and a dynamically learned one, and state what OSPF and BGP are each used for at a conceptual level.
- Explain how LDP distributes labels and why MPLS is used as tunnel transport for a VPN.
- Distinguish VPWS, VPLS, and VPRN by what each service carries.
Key Takeaway
Aim to be able to teach each module's core ideas aloud. If you can explain the difference between VPWS, VPLS, and VPRN or summarize a route block without hesitation, you are studying at the right depth. For practice that mirrors the multiple-choice style, try the original supplemental questions at our NRS I practice test site; these are independent study materials, not actual exam questions, and carry no guarantee of results.
Scheduling, Fees, and the Appointment Clock
The published exam fee is USD 125. Training prices are separate and should not be confused with the exam fee; the course length and purchase price are training facts, not examination facts. For a complete breakdown of spending, see NRS I Certification Cost 2026: Complete Pricing Breakdown, and for timing logistics see NRS I Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Two mechanics are worth internalizing before exam day:
- Plan for the full 110-minute appointment but think of your testing window as 90 minutes. The 20-minute introductory survey comes first.
- Because you cannot lean on a known cutoff, avoid scheduling a retake mindset into your first attempt. Book when your practice results are consistently strong across all six modules, not when you merely feel "close."
Sequencing Your Prep by Module
This is the one place for study methodology, and it is tied directly to NRS I's structure. The modules build on one another, so order matters more than clock-watching. A suggested progression for a candidate with some networking background:
Foundations and Ethernet
- Layer models, encapsulation, control versus forwarding
- Frame structure, VLANs, hub versus switch behavior
The Internet Layer
- Daily subnetting and route-summarization drills
- Packet-header fields and forwarding decisions
Routing Basics and SR OS
- Static routes, OSPF fundamentals, BGP introduction
- 7750SR hardware, boot sequence, MD-CLI configuration concepts
Services Overview and Review
- MPLS transport, LDP label distribution, VPWS/VPLS/VPRN
- Full-length practice under a 90-minute limit
Why this order? Services Overview depends on understanding routing and forwarding, and routing depends on addressing. Studying MPLS and VPNs first would leave you memorizing terms without the context that makes questions answerable. For a fuller plan, see NRS I Study Guide 2026: How to Pass on Your First Attempt, and the NRS I Cheat Sheet 2026: One-Page Review of Must-Know Facts works well for the final days.
The 2027 Exam Revision Window
This is a time-sensitive detail that affects when you should test. Nokia has announced a revised exam on 2027-03-09, with the exam unavailable from 2027-02-09 through 2027-03-08. The content in this article reflects the exam scope as reviewed in October 2026.
| Date | What happens |
|---|---|
| Through 2027-02-08 | Current 4A0-100 scope applies (as reviewed October 2026) |
| 2027-02-09 to 2027-03-08 | Exam unavailable |
| From 2027-03-09 | Revised exam announced; recheck scope and details |
Who Values This Credential
NRS I is an entry-level, fundamentals-oriented credential. It signals that you understand IP networking and how Nokia service routers deliver VPN-type services, which is relevant to teams that operate or support Nokia IP routing platforms. Typical audiences include network operations staff, support and field engineers, and newcomers building toward higher Nokia certifications. It is also a sensible starting point before moving up the Nokia path; note that NRS II and SRA are separate credentials with their own requirements.
For the career-side picture, NRS I Jobs and NRS I Salary Guide 2026: Complete Earnings Analysis discuss roles and earnings, and Is the NRS I Certification Worth It? Complete ROI Analysis 2026 weighs the investment. We do not cite specific salary figures here because none are established in the sources reviewed.
Frequently Asked Questions
No current numeric pass threshold is established in the sources reviewed for Nokia's 4A0-100 exam. Nokia's exam page lists the format (40 multiple-choice questions, 90 minutes) but the reviewed pages do not state a cutoff. Check Nokia's exam page directly when you register.
The 4A0-100 IP Networks and Services Fundamentals exam has 40 multiple-choice questions and a 90-minute time limit. The full appointment is 110 minutes because it includes a 20-minute introductory survey, which is not part of the exam time.
No. The six modules are an issuer-designated candidate exam-topic outline, not a weighted examination blueprint, and Nokia does not present them as exhaustive. Study all six rather than skipping any in favor of a supposed higher-weight area.
The published exam fee is USD 125. Training course pricing is separate and is a different cost from the exam itself. See the certification cost guide for how the pieces fit together.
Nokia announced a revised exam on 2027-03-09, with the exam unavailable from 2027-02-09 through 2027-03-08. If you are prepared against the current outline, testing before the unavailability window avoids having to re-verify a changed scope. Recheck Nokia's pages before booking either way.
For more background on what the credential represents, see NRS I Certification and NRS I Training, and when you are ready to test your recall under timed conditions, head to the NRS I Exam Prep practice tests.