- The Short Answer: Service Routing Architect
- Why the Acronym Causes Confusion
- Where SRA Sits in Nokia's Certification Ladder
- What "Architect" Implies for the Exam
- The Six Preparation Groups, Explained
- Written Exams Versus the Practical Lab
- The Composite Shortcut and What It Doesn't Cover
- Who Uses the Title in Practice
- Quick Reference Table
- Sequencing Your Preparation by Domain
- Frequently Asked Questions
- Here, SRA means Nokia Service Routing Architect, a multi-exam certification, not a single test.
- The current route needs written exams 4A0-102, 4A0-105, 4A0-106, 4A0-107 and 4A0-115, then the practical lab.
- The ASRA4A0 practical lab runs 7 hours, split into two independent 3.5-hour sections.
- The optional 4A0-C02 composite replaces only 4A0-102/105/106/107, never 4A0-115 or the lab.
The Short Answer: Service Routing Architect
If you are searching "what does SRA stand for" in a networking context, the answer is Service Routing Architect. It is Nokia's architect-level credential for engineers who design, build and troubleshoot service-provider networks on the 7750 SR family running SR OS. The word "service" matters: the certification is about delivering services such as VPLS, VPRN and EVPN across an IP/MPLS core, not merely moving packets between routers.
Anyone new to the term can find companion explainers on what SRA is and the meaning of SRA, and the broader credential overview lives on the SRA certification page. This article stays focused on the name itself: what each word signals about what you are expected to know.
Why the Acronym Causes Confusion
"SRA" is a crowded acronym. Different industries and unrelated credentials use the same three letters, and a search engine will happily mix them together. That is exactly why it pays to pin down the context before reading any exam advice, cost figures or career claims.
For related phrasing of the same question, see what is a SRA, what does SRA mean, and what is SRA certification. They approach the acronym from slightly different angles, but all resolve to the same Nokia credential in this series.
Where SRA Sits in Nokia's Certification Ladder
SRA is a multi-exam certification and is distinct from the Network Routing Specialist tiers, NRS I and NRS II. Think of those as the foundation and SRA as the architect level built on top of that foundation in terms of depth. The NRS tiers establish routing and MPLS fundamentals; SRA tests whether you can apply them to full service designs and keep those services healthy under fault conditions.
One important caveat: changes announced for NRS I in March 2027 are not part of the SRA scope discussed here, so do not apply them when planning an SRA route. Keep the two programs mentally separate.
What "Architect" Implies for the Exam
The title is not decorative. The final hurdle is a hands-on practical, and the lab description tells you what "architect" means in Nokia's terms: you must design and implement live 7750 SR service networks, interoperate across domains, diagnose performance problems, and resolve faults, using either classic CLI or MD-CLI.
Each verb maps to a skill the written exams build toward:
- Design: choosing between full-mesh, hub/spoke and extranet VPRN topologies, or deciding when H-VPLS or PBB is needed to control scale.
- Implement: configuring SAPs, SDPs, routing policies, queues and EVPN instances correctly the first time.
- Interoperate: connecting VPLS, VPWS and IRB services across EVPN and traditional MPLS networks, or stitching VPRNs together with inter-AS models.
- Diagnose and repair: finding the misconfiguration behind a missing route, an MTU mismatch, a broken designated-forwarder election or a mis-marked QoS class.
That mix is why many candidates describe the practical as a different kind of challenge from the written tests. For a candid look at where the difficulty really lies, read how hard the SRA exam is.
The Six Preparation Groups, Explained
The content is organized into six groups: five written exams and one practical lab. These are unweighted preparation groups, not a single weighted blueprint, so do not expect topic percentages. A fuller walkthrough is in the SRA exam domains guide; here is the "what does each part stand for" view.
Domain 1: BGP for Internet Routing (4A0-102)
BGP is the glue of service-provider networks, and this exam covers it from architecture down to troubleshooting.
- Inter-domain architecture and provider BGP roles
- Attributes, mechanisms and IGP interaction
- Routing-policy configuration, verification and troubleshooting
- iBGP scalability using confederations and route reflectors
- Advertise-external, add-paths and fast-reroute operation
Domain 2: Virtual Private LAN Services (4A0-105)
Multipoint Ethernet over MPLS, from first principles to scaled designs.
- SAPs, SDPs and basic VPLS creation
- Distributed-service MTU implications and FDB maintenance
- RSTP, M-VPLS with STP, LAG, MC-LAG and active/standby pseudowire resilience
- H-VPLS hierarchy and PBB to control excessive MAC learning
Domain 3: Virtual Private Routed Networks (4A0-106)
Layer-3 VPNs delivered through MP-BGP between PE routers.
- PE route distribution and BGP loop causes and prevention
- Full-mesh, hub/spoke and extranet arrangements, plus Internet access options
- Inter-AS models A, B and C
- Carrier-supporting-carrier VPN architecture and forwarding paths
Domain 4: Quality of Service (4A0-107)
The broadest topic list of the five written exams.
- IntServ/DiffServ models, classification and token-bucket metering
- Queues versus policers, WRED slope policies and queue groups
- Hierarchical scheduling and egress-port scheduling
- Marking and remarking across Layer-2, VPRN and IES services
Domain 5: Ethernet VPN Services (4A0-115)
The newest piece of the route, covering EVPN across data-center and WAN designs.
- Route types, IMET flooding, MAC-route learning and proxy-ARP
- MPLS and VXLAN configuration and interconnection
- IRB models: asymmetric and symmetric forwarding
- Ethernet segments, multihoming and designated-forwarder election
- ELINE VPWS and interworking with traditional MPLS services
Domain 6: SRA Practical Lab (ASRA4A0)
The capstone, where everything above is configured and verified on live equipment.
- BGP, QoS, VPLS and VPRN practical scope
- Classic CLI or MD-CLI, your choice
- Configuration and verification, not recall of definitions
Written Exams Versus the Practical Lab
Because SRA is not one test, you should never describe the whole certification with a single question count or duration. The written exams are issuer-linked assessments for each topic area, and the lab is a different animal entirely. The issuer states the lab content is unchanged and consists of two independent 3.5-hour sections, excluding a one-hour lunch, for a 7-hour practical in total. Topics must be configured and verified, though not every topic necessarily appears on a given sitting. It is a practical assessment, not a multiple-choice item count.
The Composite Shortcut and What It Doesn't Cover
Nokia offers an optional composite exam, 4A0-C02. It substitutes for only four of the written exams: 4A0-102, 4A0-105, 4A0-106 and 4A0-107. It does not replace 4A0-115 (EVPN) or the practical lab. So even a candidate who goes the composite route still needs EVPN knowledge and must sit the ASRA4A0 lab.
| Component | Individual route | Composite route |
|---|---|---|
| BGP (4A0-102) | Separate written exam | Covered by 4A0-C02 |
| VPLS (4A0-105) | Separate written exam | Covered by 4A0-C02 |
| VPRN (4A0-106) | Separate written exam | Covered by 4A0-C02 |
| QoS (4A0-107) | Separate written exam | Covered by 4A0-C02 |
| EVPN (4A0-115) | Separate written exam | Still required separately |
| Practical lab (ASRA4A0) | Required | Required |
Who Uses the Title in Practice
The Service Routing Architect title is aimed at engineers who work on service-provider and large-enterprise backbones built on Nokia IP/MPLS: network design engineers, senior operations and escalation engineers, pre-sales and solutions architects, and consultants who deploy or audit VPLS, VPRN and EVPN services. Employers that run or sell Nokia-based networks tend to value it as proof that you can troubleshoot live equipment, not just describe it.
For the job-market angle, see SRA jobs; for compensation discussion, the SRA salary guide; and for a value judgment, whether the SRA certification is worth it. No salary figures are asserted here because none are established in the source material for this review.
Quick Reference Table
| Item | What it is |
|---|---|
| Acronym | Service Routing Architect |
| Issuer | Nokia |
| Platform focus | 7750 SR service networks running SR OS |
| Structure | Five written exams plus a practical lab |
| Lab format | Two independent 3.5-hour sections, 7 hours total |
| CLI options in lab | Classic CLI or MD-CLI |
| Effective route date | September 8, 2026 |
| No longer required | Separate IS-IS/OSPF, MPLS and Services Architecture exams |
| Retired | Multicast 4A0-108 |
Key Takeaway
Read "Service Routing Architect" literally: services first, routing underneath, and a design-and-troubleshoot mindset on top. If your preparation only memorizes definitions, the practical lab will expose the gap quickly. Verification skills deserve as much time as configuration skills.
Sequencing Your Preparation by Domain
Generic study tricks matter less here than the order in which you tackle the domains. Because VPRN and EVPN both lean heavily on BGP, and QoS interacts with every service type, a sensible order builds dependencies first. Details on pacing and resources are in the SRA study guide, and requirements are covered in SRA requirements.
BGP first
- Route reflectors, confederations, policy and regular expressions
- Practice add-paths and advertise-external until you can verify them from the CLI
VPLS then VPRN
- Build SAP/SDP services, then study MTU and FDB behavior
- Move to MP-BGP route distribution, RD/RT and inter-AS A/B/C
QoS across services
- Classification, queues, policers and scheduling
- Apply policies to Layer-2 and Layer-3 services and verify marking
EVPN and lab rehearsal
- IMET, MAC routes, IRB, multihoming and designated-forwarder election
- Timed fault-finding drills in both 3.5-hour halves
Scheduling matters too. Check the SRA exam dates article for scheduling considerations, and keep a condensed review handy with the SRA cheat sheet. If you want structured practice questions that reinforce these domains, the SRA practice test site offers original supplemental material. It is independent study content, not issuer-endorsed, and it contains no actual exam questions or guaranteed results. Additional background on coursework is under SRA training; course prerequisites are preparation recommendations, and training is not mandatory to attempt the examinations. You can also browse the main practice test hub for more domain-focused drills.
Finally, note one source quirk: the lab page still displays superseded prerequisite exams. For current eligibility, rely on the dated September 8, 2026 program update and the current certification table. Candidates who were previously lab-eligible retain that eligibility under the announced transition. Past-pass-rate curiosity is addressed honestly in SRA pass rate, which explains why no figure is claimed.
Frequently Asked Questions
In this context it stands for Service Routing Architect, Nokia's architect-level certification for designing, implementing and troubleshooting 7750 SR service networks. It is a multi-exam credential rather than a single test.
Several. The current route requires written exams 4A0-102, 4A0-105, 4A0-106, 4A0-107 and 4A0-115, followed by the 7-hour ASRA4A0 practical lab. No single question count or duration describes the whole certification.
No. The optional 4A0-C02 substitutes only for 4A0-102, 4A0-105, 4A0-106 and 4A0-107. You still need 4A0-115 and the practical lab.
Not under the September 8, 2026 program update. Those separate exams are no longer required, though the knowledge they cover can still support your preparation. Multicast 4A0-108 is retired and is not a current requirement.
No. It is a practical assessment lasting 7 hours in two independent 3.5-hour sections, excluding a one-hour lunch. You configure and verify services using classic CLI or MD-CLI.