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, Enterprise Routing and Switching (JNCIS-ENT)
The Juniper Networks Certified Specialist, Enterprise Routing and Switching (JNCIS-ENT) certification validates your ability to configure, monitor, and troubleshoot enterprise routing and switching technologies on Junos OS. Designed for experienced networking professionals, it covers Layer 2 switching, VLANs, spanning tree, OSPF, IS-IS, BGP, tunnels, and high availability. Earning JNCIS-ENT demonstrates the practical skills needed to manage Juniper enterprise networks effectively.
Exam formatMultiple-choice questions
Duration90 minutes
DeliveryPearson VUE
Free questions978
Content last reviewed 30 July 2026 · Up to date
The certification
What JN0-352 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.
9domains
56objectives
340concepts
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-ENT certification is a specialist-level credential within the Juniper Networks Certification Program (JNCP) Enterprise Routing and Switching track. It validates your foundational knowledge of routing and switching technologies on Junos OS, including configuration, monitoring, and troubleshooting of enterprise networks. The written exam (JN0-352) assesses your understanding of Layer 2 switching, VLANs, spanning tree, protocol-independent routing, OSPF, IS-IS, BGP, tunnels, and high availability.
This certification is designed for experienced networking professionals with beginner to intermediate knowledge of routing and switching implementations in Junos. It serves as a key step in the Enterprise Routing and Switching track, building on the JNCIA-Junos associate-level certification and leading to the professional and expert levels. Earning JNCIS-ENT demonstrates your competence with Juniper enterprise routing and switching platforms, enhancing your credibility and career opportunities.
Who it’s for
This certification is for networking professionals who configure, manage, and troubleshoot enterprise routing and switching environments using Junos OS. It is ideal for those with beginner to intermediate knowledge of routing and switching implementations who want to validate their skills and advance in the Juniper certification track. Typical roles include network administrators, network engineers, and support professionals responsible for Juniper-based enterprise networks. Candidates should have hands-on experience with Junos OS and a solid understanding of networking fundamentals.
Recommended experience
Juniper recommends the Junos Intermediate Routing and Junos Enterprise Switching courses, along with related exam resources, to prepare for the JNCIS-ENT exam. These are recommended, not required. Completion of the Junos Intermediate Routing course; Completion of the Junos Enterprise Switching course; Familiarity with the exam objectives and practice exams; Hands-on experience with Junos OS in enterprise environments
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
Layer 2 Switching and VLANs
- Bridging components
- Frame processing
- VLAN ports
- VLAN tagging
- Native VLANs and voice VLANs
- Inter-VLAN routing
- Configure, monitor, or troubleshoot Layer 2 interfaces and ports
- Configure, monitor, or troubleshoot VLANs and inter-VLAN routing
Spanning Tree
- STP and Rapid Spanning Tree Protocol concepts
- Port roles and states
- Bridge Protocol Data Units
- Convergence and reconvergence
- Configure, monitor, or troubleshoot STP
- Configure, monitor, or troubleshoot RSTP
Layer 2 Security
- BPDU, loop, or root protection
- Port security including MAC limiting, DHCP snooping, Dynamic ARP inspection, IP source guard
- MACsec
- Storm control
- Layer 2 firewall filter types, processing order, match criteria and actions
- Configure, monitor, or troubleshoot Layer 2 protection and port security
- Configure, monitor, or troubleshoot storm control and firewall filters
Protocol Independent Routing
- Static, aggregate, and generated routes
- Martian addresses
- Routing instances including routing information base groups
- Load balancing
- Filter-based forwarding
- Configure, monitor, or troubleshoot protocol-independent routing components
OSPF
- OSPF Fundamentals
- OSPF Configuration and Troubleshooting
IS-IS
- Link-state database
- IS-IS Protocol Data Units
- Type, length, and values
- Adjacencies and neighbors
- Levels and areas
- Designated intermediate system
- Metrics
- Configure, monitor, or troubleshoot IS-IS levels, interfaces, and adjacencies
- IS-IS routing policy application and troubleshooting tools
BGP
- BGP basic operation
- BGP message types
- Attributes
- Route/path selection process
- Internal and external BGP functionality and interaction
- Configure, monitor, or troubleshoot BGP groups and peers
- BGP routing policy application and troubleshooting tools
Tunnels
- Tunneling applications and considerations
- Generic Routing Encapsulation
- IP-IP
- Configure, monitor, or troubleshoot GRE
- Configure, monitor, or troubleshoot IP-IP tunnels
High Availability
- Link Aggregation and Redundancy
- Chassis Clustering and Virtualization
- Routing and Forwarding High Availability
- Failure Detection and Redundancy Protocols
- Software Upgrade and Maintenance
- Configuration and Troubleshooting
On the day
The exam itself
Everything Juniper Networks publishes about sitting it, and nothing we inferred.
Prerequisites
Must hold the Juniper Networks Certified Associate, Junos (JNCIA-Junos) certification.
Exam codeJN0-352
CertificationJuniper Networks Certified Specialist, Enterprise Routing and Switching (JNCIS-ENT)
Exam formatMultiple-choice questions
Duration90 minutes
Questions65 multiple-choice questions
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, Enterprise Routing and Switching (JNCIS-ENT)
PrerequisiteMust hold the Juniper Networks Certified Associate, Junos (JNCIA-Junos) certification.
Credential earnedJuniper Networks Certified Specialist, Enterprise Routing and Switching (JNCIS-ENT) Certification Renewal and maintenance
Juniper certifications are valid for three years. Recertification is required to maintain the credential. 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
How does JNCIS-ENT relate to the other certifications in the Enterprise Routing and Switching track?
The track includes four certifications: JNCIA-Junos (Associate), JNCIS-ENT (Specialist), JNCIP-ENT (Professional), and JNCIE-ENT (Expert). JNCIS-ENT is the second level, requiring JNCIA-Junos as a prerequisite.
Is JNCIA-Junos required before taking JN0-352?
Yes, JNCIA-Junos is a mandatory prerequisite for the JNCIS-ENT exam.
Can I take the JNCIS-ENT exam online?
Yes, Juniper exams are delivered by Pearson VUE and are available both online and at test centers.
What is the retake policy for the JN0-352 exam?
Juniper's retake policy requires a waiting period between attempts. Check the official Juniper certification policies for specific details.
Are there any hands-on labs in the JNCIS-ENT exam?
No, the JNCIS-ENT exam is a written exam consisting of 65 multiple-choice questions. Hands-on lab exams are part of the expert-level JNCIE-ENT certification.
What job roles does JNCIS-ENT align with?
JNCIS-ENT is suited for network administrators, engineers, and support professionals who manage Juniper enterprise routing and switching environments.
Can I recertify JNCIS-ENT by passing a higher-level exam?
Yes, passing a higher-level exam such as JNCIP-ENT or JNCIE-ENT can recertify your JNCIS-ENT credential.
Is the JNCIS-ENT exam available in languages other than English?
No, the exam is only provided in English.
Information freshness · Content last reviewed on 2026-07-30 Up to date
Practice free questions 978 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.
9domains
56objectives
340concepts
217free 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
1Layer 2 Switching and VLANs142 questions
Bridging components5 concepts · 3 pagesOpen →Frame processing7 concepts · 5 pagesOpen →VLAN ports5 concepts · 3 pagesOpen →VLAN tagging7 concepts · 4 pagesOpen →Native VLANs and voice VLANs6 concepts · 4 pagesOpen →Inter-VLAN routing6 concepts · 4 pagesOpen →Configure, monitor, or troubleshoot Layer 2 interfaces and ports8 concepts · 5 pagesOpen →Configure, monitor, or troubleshoot VLANs and inter-VLAN routing6 concepts · 4 pagesOpen →
2Spanning Tree104 questions
STP and Rapid Spanning Tree Protocol concepts10 concepts · 5 pagesOpen →Port roles and states5 concepts · 5 pagesOpen →Bridge Protocol Data Units5 concepts · 3 pagesOpen →Convergence and reconvergence5 concepts · 3 pagesOpen →Configure, monitor, or troubleshoot STP4 concepts · 3 pagesOpen →Configure, monitor, or troubleshoot RSTP6 concepts · 4 pagesOpen →
3Layer 2 Security129 questions
BPDU, loop, or root protection4 concepts · 2 pagesOpen →Port security including MAC limiting, DHCP snooping, Dynamic ARP inspection, IP source guard4 concepts · 4 pagesOpen →MACsec7 concepts · 6 pagesOpen →Storm control4 concepts · 3 pagesOpen →Layer 2 firewall filter types, processing order, match criteria and actions4 concepts · 4 pagesOpen →Configure, monitor, or troubleshoot Layer 2 protection and port security14 concepts · 6 pagesOpen →Configure, monitor, or troubleshoot storm control and firewall filters6 concepts · 3 pagesOpen →
4Protocol Independent Routing93 questions
Static, aggregate, and generated routes9 concepts · 3 pagesOpen →Martian addresses5 concepts · 3 pagesOpen →Routing instances including routing information base groups5 concepts · 2 pagesOpen →Load balancing6 concepts · 3 pagesOpen →Filter-based forwarding6 concepts · 3 pagesOpen →Configure, monitor, or troubleshoot protocol-independent routing components17 concepts · 6 pagesOpen →
5OSPF40 questions
6IS-IS151 questions
Link-state database6 concepts · 4 pagesOpen →IS-IS Protocol Data Units7 concepts · 6 pagesOpen →Type, length, and values4 concepts · 4 pagesOpen →Adjacencies and neighbors5 concepts · 4 pagesOpen →Levels and areas5 concepts · 4 pagesOpen →Designated intermediate system6 concepts · 4 pagesOpen →Metrics7 concepts · 4 pagesOpen →Configure, monitor, or troubleshoot IS-IS levels, interfaces, and adjacencies6 concepts · 4 pagesOpen →IS-IS routing policy application and troubleshooting tools2 concepts · 1 pagesOpen →
7BGP132 questions
BGP basic operation8 concepts · 4 pagesOpen →BGP message types5 concepts · 5 pagesOpen →Attributes7 concepts · 5 pagesOpen →Route/path selection process8 concepts · 4 pagesOpen →Internal and external BGP functionality and interaction8 concepts · 4 pagesOpen →Configure, monitor, or troubleshoot BGP groups and peers4 concepts · 4 pagesOpen →BGP routing policy application and troubleshooting tools4 concepts · 2 pagesOpen →
8Tunnels66 questions
9High Availability121 questions
Link Aggregation and Redundancy7 concepts · 3 pagesOpen →Chassis Clustering and Virtualization5 concepts · 5 pagesOpen →Routing and Forwarding High Availability10 concepts · 6 pagesOpen →Failure Detection and Redundancy Protocols8 concepts · 6 pagesOpen →Software Upgrade and Maintenance5 concepts · 4 pagesOpen →Configuration and Troubleshooting3 concepts · 2 pagesOpen →
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.
Bridging components3 pagesOpen →
Free in front of it
15 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
978 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.
978questions
217pages
56objectives
Freealways
Browse by domain
Every objective, and every page range, is a link — so you can pick up exactly where you left off.
1Layer 2 Switching and VLANs142 questions
2Spanning Tree104 questions
3Layer 2 Security129 questions
4Protocol Independent Routing93 questions
5OSPF40 questions
6IS-IS151 questions
7BGP132 questions
8Tunnels66 questions
9High Availability121 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.
340concepts
978free 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
340concepts 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 — 56 objectives, 340 concepts written under them, and free questions against every one. When Juniper Networks changes the outline, this page changes with it.
56objectives on the outline→340concepts written→978free 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.