How Hard Is the SRA Exam? Complete Difficulty Guide 2026

What "Hard" Actually Means for Nokia SRA

Asking how hard the Nokia Service Routing Architect (SRA) is has no single answer, because SRA is not a single exam. It is a multi-exam certification, distinct from NRS I and NRS II, that combines several written exams with a long hands-on practical lab. Each component is hard in a different way. The written exams test whether you understand protocol behavior, design trade-offs and configuration logic. The lab tests whether you can build, verify and repair a live service network under time pressure.

That mix is what makes SRA demanding. A candidate with strong theory but little keyboard time will struggle in the lab. A candidate who lives in the CLI but never studied why route reflectors, confederations or EVPN designated-forwarder election behave as they do may stumble on the written side. If you are still orienting yourself, start with our overview of what SRA certification is and then return here.

The Current Route: Five Written Exams Plus a Lab

Effective September 8, 2026, the current route to SRA requires written exams 4A0-102, 4A0-105, 4A0-106, 4A0-107 and 4A0-115, followed by the 7-hour practical ASRA4A0 lab. Understanding this structure is the first step in judging difficulty, because the total workload is the sum of six distinct assessments.

• 4A0-102: BGP for Internet Routing
• 4A0-105: Virtual Private LAN Services (VPLS)
• 4A0-106: Virtual Private Routed Networks (VPRN)
• 4A0-107: Quality of Service
• 4A0-115: Ethernet VPN Services (EVPN)
• ASRA4A0: the SRA Practical Lab

There is one shortcut worth knowing about. The optional 4A0-C02 composite substitutes for only 4A0-102, 4A0-105, 4A0-106 and 4A0-107. It does not replace 4A0-115, and it does not replace the practical lab. If the composite appeals to you, treat it as a way to consolidate four written topics, not as a way to skip the EVPN exam or the lab. For eligibility details, see our guide to SRA requirements and how to qualify.

What changed with the September 2026 update

Separate IS-IS/OSPF, MPLS and Services Architecture exams are no longer required in the current route. Their knowledge can still support your preparation, since IGP behavior underpins BGP next-hop resolution and MPLS transport underpins every VPLS and VPRN service. Multicast 4A0-108 is retired and is not a current SRA requirement. Candidates who were previously lab-eligible retain that eligibility under the announced transition. Note that the lab page itself may still display superseded prerequisite exams, so rely on the dated program update and current certification table for eligibility rather than that page alone.

Difficulty by Domain: Where Candidates Struggle

The six groups below are unweighted preparation groups, not a single weighted blueprint, so no percentage should be attached to any of them. The following notes describe where the conceptual and practical difficulty tends to concentrate, based on the published topic scope. For a full walkthrough of the content areas, see our SRA exam domains guide.

If one group has a reputation for catching people out, it is QoS, simply because of the volume of policy objects and the precision needed to apply them correctly. EVPN is a close second for engineers coming from classic VPLS backgrounds, since the control plane works very differently. Neither claim is backed by a published failure statistic; this is an observation about conceptual load, not a measured rate. For more on outcomes data, read our SRA pass rate analysis.

The 7-Hour Practical Lab: The Real Gatekeeper

For most candidates, the ASRA4A0 lab is the hardest element of the entire route. It asks you to design and implement live 7750 SR service networks, interoperate, diagnose performance and resolve faults, using either classic CLI or MD-CLI. It is structured as two independent 3.5-hour sections, excluding a 1-hour lunch. Topics must be configured and verified, although not every topic necessarily appears in a given sitting. The issuer states that the lab content is unchanged by the 2026 update.

Why the lab feels harder than the written exams

• Verification is part of the task. Configuring a feature is not enough; you must demonstrate that it works.
• Cross-domain interaction. A BGP policy mistake can break a VPRN, and an MTU mismatch can silently break a VPLS pseudowire.
• Time pressure. Seven hours sounds generous until you are chasing a fault in a service you configured two hours earlier.
• No topic guarantee. Because not every topic necessarily appears, you cannot safely skip any area of the published scope.

Because the lab is a practical assessment rather than an item-count exam, preparing for it with flashcards alone is a poor fit. Build repeatable lab topologies and rehearse the full cycle of configure, verify, break and repair. Our SRA study guide covers how to structure that preparation end to end.

Difficulty Comparison Across the Six Groups

The table below is a qualitative comparison of where the effort tends to go for each component. It is not a statistical ranking, and it should not be read as a pass-rate indicator. Individual difficulty depends heavily on your background.

Who Finds It Easier, and Who Struggles

Because the certification targets people who design and operate service-provider networks, the audience skews toward working engineers. Your day job largely determines which parts feel natural.

• Engineers already running Nokia 7750 SR networks usually find the CLI and service constructs familiar, and the lab feels like an extension of daily work. Their gap is often breadth, since a given role may never touch EVPN or carrier-supporting-carrier designs.
• Engineers from other vendors often understand BGP and MPLS concepts but must learn SR OS syntax, the service model and the QoS policy structure from scratch, which adds meaningful time before the lab.
• Data-center focused engineers may be comfortable with EVPN and VXLAN but weaker on inter-AS VPRN models and detailed hierarchical QoS.
• Service-provider generalists tend to be strong on BGP and VPRN and need the most work on EVPN multihoming and IRB variants.

If you want to understand the career side of that investment, our analysis of whether the certification is worthwhile is in Is the SRA certification worth it?, and we cover typical employers in SRA jobs.

Sequencing Your Preparation by Difficulty

Generic study methods matter less here than ordering the material sensibly. The topics build on one another: BGP and IGP knowledge underpins VPRN, MPLS transport underpins VPLS and VPRN, and QoS applies across all of them. A sensible order front-loads the foundations and saves the cross-cutting material for last. Training courses are preparation recommendations, not additional current examination requirements, and training is not mandatory to attempt the exams. For training options, see our page on SRA training.

This eight-week layout is a template, not a promise; stretch it if you are new to SR OS. Use a practice test to check conceptual recall on the written topics, and rely on your own lab environment for the hands-on skills. For quick revision of facts you must not forget, our SRA cheat sheet is a useful companion.

What We Cannot Tell You About Difficulty

Honest difficulty guidance includes naming the gaps. The following items are not established in the sources reviewed for this article, and you should be skeptical of anyone who states them confidently:

• A current pass rate for any SRA component.
• A scored-versus-unscored item split for the written exams.
• A single overall exam fee for the whole route. Costs accrue across multiple components, so see SRA certification cost for how to budget.
• Any additional examination-domain weighting. The six groups are unweighted preparation groups, and no topic percentages are established.
• Specific passing scores, which you should confirm against issuer materials rather than third-party figures; see our note on the SRA passing score.

Also keep the scope boundaries straight. Changes announced for NRS I in March 2027 do not apply to the SRA scope described here, and scheduling details should be confirmed through the issuer; our SRA exam dates guide explains how to track them. This article reflects sources reviewed on October 11, 2026, and practice material from this site is original supplemental content that is not endorsed by Nokia and cannot guarantee results.

Frequently Asked Questions