- What a 4A0-107 Actually Is
- Exam Format, Fee and Delivery
- Where 4A0-107 Fits in the SRA Path
- The Five Preparation Modules
- What the Questions Reward
- Who Takes It and Who Hires for It
- Prerequisites, Retakes and Renewal
- A Module-Ordered Preparation Sequence
- Common Confusions Cleared Up
- Frequently Asked Questions
- 4A0-107 is Nokia's Quality of Service written exam: 40 multiple-choice questions, 90 testing minutes, USD 125 through Pearson VUE.
- It earns Service Routing Architect credit, but passing it alone does not award the SRA certification.
- Nokia lists five unweighted modules: QoS intro, classification, queues and policers, hierarchical bandwidth allocation, and marking and remarking.
- No mandatory exam prerequisites exist, and written-exam retakes have no mandatory waiting period or attempt limit.
What a 4A0-107 Actually Is
The label "4A0-107" is an exam code, and on this site it refers to exactly one thing: the Nokia (formerly Alcatel-Lucent) Quality of Service written exam. Nokia's current title for the credential-facing content is Nokia Quality of Service, and the exam itself is a proctored, multiple-choice test that checks whether you understand how traffic is classified, queued, policed, scheduled and marked on Nokia service routing platforms.
If you came here wondering whether a "4A0-107" is a job title, a product or a course, the short answer is that it is none of those. It is a single written assessment inside Nokia's Service Routing Certification (SRC) program. A related four-day preparation course exists, and a separate practical lab exists for the architect-level credential, but neither of those is the 4A0-107 itself. For other angles on the same question, see our pages on what 4A0-107 is, the 4A0-107 meaning, and what 4A0-107 stands for.
Exam Format, Fee and Delivery
The logistics are refreshingly concrete, which makes planning easier than for many vendor exams.
| Item | 4A0-107 Detail |
|---|---|
| Issuer | Nokia (formerly Alcatel-Lucent) |
| Delivery | Pearson VUE, proctored online or at a test center |
| Fee | USD 125 |
| Questions | 40 multiple-choice written questions, in English |
| Testing time | 90 minutes |
| Appointment length | 110 minutes, including a 20-minute introductory survey |
| Official passing percentage | Not verified in reviewed public sources |
Two details deserve attention. First, the appointment is longer than the exam: the 20-minute introductory survey sits in front of your 90 minutes of testing, so arrive (or log in) with the full 110 minutes in mind. Second, Nokia's public sources reviewed for this article do not state an official passing percentage or a pass-rate statistic. Anyone quoting a precise cut score or success rate is not citing a verified Nokia figure. Our pages on the 4A0-107 passing score and 4A0-107 pass rate explain how to reason about this uncertainty, and the certification cost breakdown covers the fee in the context of total spend, including optional training.
For scheduling specifics, such as testing windows and booking, see 4A0-107 exam dates.
Where 4A0-107 Fits in the SRA Path
The exam's strategic importance comes from the credential it feeds. 4A0-107 earns Service Routing Architect (SRA) credit. That wording is deliberate: passing the exam alone does not award SRA. The architect credential is built from several written exams plus a separate seven-hour practical lab. The written exam is a 90-minute multiple-choice test; the lab is a different, hands-on activity with its own preparation demands.
Nokia has also announced a program update, titled Important updates are coming to the Service Routing Certification (SRC) Program in 2026/27, dated September 8, 2026. It reduces the number of SRA written requirements from eight to five and retains 4A0-107, while leaving the practical lab unchanged. In plain terms, the QoS exam survives the restructuring, which is a meaningful signal for anyone deciding whether to invest study time in it now.
The Five Preparation Modules
Nokia's public exam page directs candidates to the objectives and modules of the Nokia Quality of Service course (course code 3FL30639AAAAZZZZA). Five headings appear in that curriculum. They are unweighted: Nokia does not publish percentage allocations, and the headings should not be treated as proof of exhaustive exam coverage or an official domain count. Think of them as the map Nokia itself points you to, not a guaranteed blueprint. For a deeper walk-through, read the complete guide to all five content areas.
Domain 1: Introduction to QoS
The conceptual foundation: why QoS exists, what problems it solves, and the vocabulary every later module assumes.
- Why congestion and contention force differentiated treatment of traffic
- How classes of service map to application needs such as delay and loss sensitivity
- Where in the forwarding path QoS decisions are applied
Domain 2: Traffic Classification
How the router decides which traffic belongs to which forwarding class and priority.
- Matching on packet header fields and existing markings
- Mapping matched traffic into forwarding classes
- Understanding what happens to traffic that matches nothing
- Reading policy logic and predicting the resulting classification
Domain 3: Queues and Policers
The mechanics of buffering, scheduling and rate enforcement.
- How queue parameters shape burst handling and drop behavior
- The difference between shaping behavior in queues and policing behavior in policers
- Rate and burst concepts, and how they interact with scheduling priority
- Reasoning about which traffic is delayed, dropped or forwarded under congestion
Domain 4: Hierarchical Bandwidth Allocation
How bandwidth is divided across levels, such as individual queues, groups and shared egress capacity.
- Parent-child relationships between scheduling levels
- How guaranteed and excess bandwidth are distributed
- Tracing a scenario through multiple tiers to find the resulting allocation
Domain 5: Marking and Remarking
Setting or rewriting QoS markings so treatment is preserved or changed across network boundaries.
- Trust boundaries and when to accept or override incoming markings
- How internal forwarding-class decisions translate into outbound markings
- Consistency of treatment across multiple hops and domains
What the Questions Reward
Forty multiple-choice questions in 90 minutes gives you a little over two minutes per item, which is comfortable for recall questions and tight for multi-step scenarios. Nokia's linked public sample document, Practice Exam Questions for Nokia Quality of Service (4A0-107) (document code CID202017), is worth reading early because it shows the question register firsthand rather than leaving you to guess.
Based on the nature of the curriculum, expect these patterns:
- Conceptual discrimination: distinguishing similar mechanisms, such as policing versus shaping or classification versus marking, where wrong answers are plausible misuses of the right vocabulary.
- Scenario tracing: given a described configuration, determine which class a packet lands in, whether it is dropped, or what bandwidth it receives.
- Order-of-operations reasoning: knowing where in the pipeline each QoS function acts, because the answer often depends on which step happens first.
- Configuration literacy: because current course cases and labs use MD-CLI, being able to read MD-CLI-style snippets and infer behavior is a practical advantage.
Key Takeaway
Do not memorize definitions in isolation. Practice tracing a single packet through classification, queueing or policing, hierarchical scheduling and marking, and explain each decision aloud. That end-to-end trace is the skill most of the curriculum builds toward. Our one-page cheat sheet is a handy summary once you've built that mental model.
Who Takes It and Who Hires for It
The natural audience is the service provider and large-enterprise networking community that runs Nokia service routing platforms: network engineers, designers and operations staff responsible for delivering differentiated services such as VPN, voice, video and business-critical applications over shared infrastructure. QoS knowledge is rarely a standalone job; it is a competency embedded in roles such as backbone and edge routing engineer, service design engineer, network architect and NOC escalation specialist.
Employers most likely to value the credential include telecommunications carriers, managed-service providers, system integrators supporting Nokia deployments, and enterprises operating Nokia-based WANs. Because the exam feeds the architect-track SRA credential, it also signals long-term commitment to the Nokia routing ecosystem. We cover roles in more detail on our 4A0-107 jobs page, earnings discussion in the salary guide (no invented figures, only qualitative analysis), and the investment question in is the 4A0-107 certification worth it.
Prerequisites, Retakes and Renewal
Prerequisites
There are no mandatory exam prerequisites. You can register without holding another Nokia certification. The four-day preparation course has its own recommended prerequisites, but those are preparation guidance, not an entry gate to the exam. A realistic self-check: if IP forwarding, Ethernet and basic Nokia router operation are unfamiliar, build that foundation before tackling QoS, because every module assumes it. See 4A0-107 requirements for a fuller eligibility discussion, and 4A0-107 training for course options.
Retakes
Written-exam retakes carry no mandatory waiting period and no attempt limit. That removes the penalty-for-failure anxiety some vendors impose, though each attempt still costs the exam fee, so treat the sample questions as a readiness gauge before paying again.
Validity and renewal
SRC certifications are valid for three years. Recertification is available before termination, which occurs six months after expiry, and 4A0-107 is an accepted renewal option for NRS I, NRS II and SRA. These are credential-maintenance rules; they do not create a separate expiry date attached to the exam credit itself.
A Module-Ordered Preparation Sequence
Because the five modules build on each other, order matters more than total hours. One sensible sequence, with the reasoning attached:
Introduction to QoS and Traffic Classification
- Lock in vocabulary first; later modules assume it
- Trace sample packets into forwarding classes by hand
Queues and Policers
- Spend extra time here: this is where policing versus shaping confusion costs points
- Read MD-CLI queue and policer snippets and predict outcomes
Hierarchical Bandwidth Allocation
- Work multi-tier allocation examples on paper
- Revisit queue behavior since this module stacks on it
Marking and Remarking, then full review
- Connect marking back to classification as a closed loop
- Attempt Nokia's public sample questions under timed conditions
Scheduling the hardest mechanical content (queues, policers and hierarchy) in the middle gives you time to revisit it before the exam. For a broader plan, the 4A0-107 study guide expands on this, and how hard the exam is helps calibrate how much time you personally need. When you're ready to test yourself, our practice tests let you drill scenario questions in this style.
Common Confusions Cleared Up
| Often Confused With | Reality |
|---|---|
| The preparation course | The four-day course is training; the exam is a separate 90-minute written test. Training is optional. |
| The SRA practical lab | The seven-hour lab is a distinct hands-on activity, not part of 4A0-107. |
| Earning SRA | 4A0-107 earns SRA credit only; other requirements must also be met. |
| A published cut score | No official passing percentage was verified in reviewed public sources. |
| A weighted blueprint | The five modules are unweighted headings, not official percentages. |
One more comparison worth noting for planners: Nokia's 2026/27 update also affects other exams in the program. The same announcement gives February 8, 2027 as the last testing day for 4A0-104, which is a separate exam and should not be conflated with the QoS exam's status. For naming-variant questions, our pages on what 4A0-107 certification is, what 4A0-107 means, and the general 4A0-107 certification overview offer additional context.
Frequently Asked Questions
It is the exam code for Nokia's Quality of Service written exam (formerly Alcatel-Lucent). It is a 40-question multiple-choice test, delivered through Pearson VUE, that earns Service Routing Architect credit within Nokia's Service Routing Certification program.
The fee is USD 125. You get 90 minutes of testing for 40 questions, inside a 110-minute appointment that includes a 20-minute introductory survey. It can be taken online with a proctor or at a test center.
No. The exam earns SRA credit, but SRA also requires the other written requirements and the separate seven-hour practical lab. Passing this exam alone does not award the certification.
There are no mandatory exam prerequisites. Written-exam retakes have no mandatory waiting period or attempt limit, although each attempt requires paying the exam fee again.
Nokia's curriculum lists five unweighted modules: Introduction to QoS, Traffic Classification, Queues and Policers, Hierarchical Bandwidth Allocation, and Marking and Remarking. They guide preparation but are not an official weighted blueprint.
No. Nokia's September 8, 2026 program update reduces SRA written requirements from eight to five and explicitly retains 4A0-107, with the practical lab unchanged.