You can see it againUnder pressure people bring back shapes and positions long after the wording has gone.
Picture superiority · Shepard 1967, Standing 1973
JUNIPER NETWORKSJuniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps)
The Juniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps) certification validates your ability to apply automation tools and scripting languages to Junos devices and networks. Designed for networking professionals with intermediate automation knowledge, it covers platform automation, Ansible, gRPC/gNMI, and Junos automation scripts. Earning JNCIS-DevOps demonstrates you can automate and orchestrate Juniper environments effectively.
Exam format65 multiple-choice questions
Duration90 minutes
DeliveryPearson VUE
Free questions442
Content last reviewed 30 July 2026 · Up to date
The certification
What JN0-423 proves, and what it asks of you
What this certification covers, who it is written for, and what the exam itself looks like on the day.
5domains
21objectives
150concepts
What it is
What this certification is
What it validates, who it is written for, and the experience it assumes.
About this certification
The JNCIS-DevOps certification is the specialist-level credential within the Juniper Automation and DevOps track. It validates your understanding of common scripting languages and tools used to automate device and network functions, with a focus on applying tools such as PyEZ, Python, and Ansible to Junos devices and networks.
The exam verifies your knowledge of platform automation concepts, including management process (MGD-based) automation, Terraform, the Juniper Extension Toolkit (JECT), and gRPC/gNMI for telemetry. You will also be tested on Ansible playbooks, Junos automation scripts (commit, op, event, and SNMP), and YANG models for configuration management. Passing the exam demonstrates you have the intermediate skills needed to automate and orchestrate Junos-based environments.
Who it’s for
This certification is for networking professionals with intermediate knowledge of automation tools and best practices who are responsible for automating device and network functions in Junos environments. Typical roles include network automation engineers, DevOps engineers, and network administrators who work with Junos devices and want to demonstrate their ability to use scripting tools like PyEZ, Python, and Ansible to streamline operations.
Recommended experience
Juniper recommends the Juniper Platform Automation and NetDevOps training course and hands-on experience with automation tools and Junos devices. Familiarity with Python, PyEZ, and Ansible for network automation; Understanding of Junos OS fundamentals and management processes; Experience with gRPC/gNMI and telemetry concepts; Knowledge of YANG data models and OpenConfig
The syllabus
What you’ll learn
Every domain and objective Juniper Networks measures, with the weight they carry on the exam.
The official Juniper Networks exam outline · checked 30 July 2026 · See the source
Platform Automation Overview
- Management process (MGD-based) automation
- Terraform
- Juniper Extension Toolkit (JET) service process (JSD-based) automation
gRPC
- Proto buff
- gRPC protocol
- OpenConfig
- gRPC/gNMI for Junos telemetry
- Sensor paths
- Telemetry tools (gNMIc, TIG stack)
Ansible
- Supported files
- Play books
- Vault
- JSNAPy
- Templates (Jinja2)
Junos Automation Scripts
- Commit scripts
- Op scripts
- Event scripts
- SNMP scripts
YANG
- Implementation concepts
- OpenConfig
- YANG syntax and data types
On the day
The exam itself
Everything Juniper Networks publishes about sitting it, and nothing we inferred.
Prerequisites
JNCIA-DevOps (Automation and DevOps, Associate)
Exam codeJN0-423
CertificationJuniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps)
Exam format65 multiple-choice questions
Duration90 minutes
DeliveryPearson VUE
LanguagesEnglish
After you pass
Where this credential goes next
The path Juniper Networks lays out, how the credential is kept, and where to book.
Step-by-step path to Juniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps)
PrerequisiteJNCIA-DevOps (Automation and DevOps, Associate)
Credential earnedJuniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps) Certification Renewal and maintenance
Juniper certifications are valid for three years. For more information, see the Juniper Recertification page. Stay current with the latest technologies and maintain your certification.
Learn more about renewal requirements Lifecycle status
This certification is currently active and available. Juniper Networks maintains this certification to validate current skills and industry relevance.
Exam status: ActiveMaintained by Juniper Networks
Exam registration
Register for the exam through Pearson VUE, Juniper Networks’s authorized testing partner.
Schedule your examVisit the official Juniper Networks certification page for exam policies and requirements.
View the official pageYour coach
And when you are serious, your coach Pip takes over
Your coach in the app reads what you have answered with the book closed and tells you one thing to do tonight. It will not count an answer you gave with the page open, and it will tell you when you are not ready.
See how the coach worksBefore you book
Questions people ask
What is the difference between JNCIA-DevOps and JNCIS-DevOps?
JNCIA-DevOps is the associate-level certification in the Automation and DevOps track, while JNCIS-DevOps is the specialist-level certification. JNCIA-DevOps is a prerequisite for JNCIS-DevOps and covers foundational automation concepts, whereas JNCIS-DevOps validates intermediate knowledge of automation tools and best practices.
Is JNCIS-DevOps a prerequisite for any higher-level Juniper certification?
According to the Juniper certification track table, the Automation and DevOps track currently has no Professional or Expert level certifications, so JNCIS-DevOps is the highest certification in this track.
Can I take the JNCIS-DevOps exam online?
Yes, Juniper exams are delivered by Pearson VUE and can be taken online or in-person at test centers around the world.
What software version is covered on the JNCIS-DevOps exam?
The exam is based on Junos OS 24.4.
How soon will I receive my exam results?
Pass/fail status is available immediately after taking the exam.
What job roles does the JNCIS-DevOps certification map to?
The certification is designed for networking professionals with intermediate knowledge of automation tools and best practices, such as network automation engineers and DevOps engineers working with Junos devices.
Can I recertify JNCIS-DevOps by passing a different Juniper exam?
Juniper certifications are valid for three years. Recertification options are detailed on the Juniper Recertification page, and some courses can also be used to recertify an existing certification.
Information freshness · Content last reviewed on 2026-07-30 Up to date
Practice free questions 442 questions, free, no account needed.
The curriculum
The whole exam, mapped and written
Every domain, every objective, and every concept Juniper Networks measures — each one written out.
5domains
21objectives
150concepts
96free pages
The domains, and what sits inside them
Every objective below is a page you can open and practise now, without an account.
The official Juniper Networks exam outline · checked 30 July 2026 · See the source
1Platform Automation Overview62 questions
2gRPC128 questions
3Ansible102 questions
4Junos Automation Scripts85 questions
Not a table of contents
Every line on this map already opens
In front of every objective the practice pages are already there, free and without an account. This is one objective, opened.
Management process (MGD-based) automation5 pagesOpen →
Free in front of it
21 questions on this objective, five to a page. Every range above is a real page, open now, with no account.
Reading the map is not the same as knowing the ground
The curriculum tells you what is on the exam. Proving you know it is a different job — and it is the one the closed-book run does.
Free questions
442 questions. No account, no card.
The whole bank is open. 5 questions to a page, every answer explained, and a discussion thread on each one.
442questions
96pages
21objectives
Freealways
Browse by domain
Every objective, and every page range, is a link — so you can pick up exactly where you left off.
1Platform Automation Overview62 questions
2gRPC128 questions
3Ansible102 questions
4Junos Automation Scripts85 questions
What a practice page gives you
1Five to a page
Short enough to finish, long enough to matter.
2Every answer explained
Not only which one is right — why the others are wrong.
3A discussion on each
Ask, answer, and vote. Every question has its own thread.
A question, and the idea behind it
Every question comes from a concept
These are not trivia. Each one is written against a concept in the book, so when you get one wrong there is somewhere to go and find out why.
The visual book
See it once. Carry it into the exam.
The pages shown here come from our AI-900 book — an example of how each concept is written in plain language and, where the idea needs one, drawn as a full page you can take in at a glance.
150concepts
442free questions
Why a picture, and not another paragraph
Three reasons, and each one is a real finding rather than a slogan.
You can see it againThe whole idea at onceWhere it starts, what happens in the middle, what comes out, and the mistake to avoid.
Multimedia principle · MayerThe look-alikes sit togetherThe pairs the exam tests are drawn side by side, so the difference is seen, not told.
Dual coding · PaivioWhat one page is made of
You are never asked to read a poster here — only to see how one is built. After that, every other page is legible at a glance.
1A numbered strip on top
The idea as a sequence, followed with a finger before a word is read.
2Panels for the parts
What it is, how the machine learns it, when it is the right tool.
3The trap, framed
The distinction the exam tests, given its own box instead of buried in prose.
4One line at the bottom
The sentence to carry into the exam room.
Open book, on purpose
Answer it with the picture beside you
This is the part that teaches. The illustration and the written explanation stay where they are while you work, so a scenario stops being a memory test and becomes something you can simply look at.
It teaches · it does not count
A smartphone uses AI to unlock when the owner looks at the camera. Which AI capability is being used?
AImage classification
BFacial recognition
COptical character recognition
DObject detection
Look at the five steps. Detect finds a face, align straightens it, encode turns it into numbers, search compares it with a stored face, and decide answers one question: is this the same person? Classification would only say “a face”. Detection would only draw a box. Neither decides whose.
Then the page shuts, and it starts counting
The same questions come back with the book closed — that run is the one that counts. After it, your coach picks one thing for tonight, sized to the time you have, and brings pages back before you lose them.
Testing effect · Roediger & Karpicke 2006 · spacing effect · Cepeda et al. 2006
Official resources
Straight from Juniper Networks
Where the exam is defined, scheduled and scored.
2official links
150concepts mapped
The source
Juniper Networks’s own pages
We link to them rather than repeat them, so nothing here goes stale behind them.
Checked against the source
Every objective on the official Juniper Networks outline already has questions here
We build from the official skills outline, not from a summary of it — 21 objectives, 150 concepts written under them, and free questions against every one. When Juniper Networks changes the outline, this page changes with it.
21objectives on the outline→150concepts written→442free questions
An official page tells you what will be asked. It cannot tell you what you will get right.
That is the only question worth answering the night before, and no link answers it. You answer it by taking the questions with the book closed, and seeing what comes back.