JNCIA-JUNOS: Juniper Networks Certified Associate, Junos (JNCIA-Junos)

Q: What Junos OS version should I study?

Junos OS 21.2. The current exam is **JN0-106**, which replaced JN0-105 on 6 April 2026, and Juniper's official exam page lists Junos OS 21.2 as the software version it is written against — so treat 21.2 as your baseline rather than the newest release you can download. Practising on a later release is fine, because the associate-level fundamentals (the CLI, the configuration hierarchy, the commit model, routing basics) are stable across versions, but check anything version-specific against 21.2. Use Juniper's [free vSRX trial](https://www.juniper.net/us/en/dm/free-vsrx-trial.html) or [Juniper Open Learning labs](https://learning.juniper.net/) to practise hands-on.

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Exam Resources

Official learning paths, exam details, skills measured, and community resources to supplement your study.

About the JNCIA-JUNOS Exam

Master Junos OS networking from the ground up

Original 250 practice questions covering all 7 JNCIA-Junos exam domains: Networking Fundamentals, Junos OS Architecture, CLI User Interfaces, Configuration Basics, Operational Monitoring, Routing Fundamentals, and Routing Policy & Firewall Filters. Written for exam JN0-106, which replaced JN0-105 on 6 April 2026 and specifies Junos OS 21.2. Character-driven scenarios.

Who Should Take This Exam?

The JNCIA-JUNOS is designed for IT professionals with some hands-on experience. 6-12 months of hands-on experience recommended.

Typical study time: 4-8 weeks of focused study

Exam Quick Facts

Detail	Value
Exam Code	JNCIA-JUNOS (exam JN0-106)
Title	Juniper Networks Certified Associate, Junos (JNCIA-Junos)
Duration	90 minutes
Questions	65
Cost	Not published by Juniper — check Pearson VUE
Provider	Pearson VUE
Validity	3 years
Question Types	Multiple choice
Official Page	View on Juniper →

Exam Domains

The JNCIA-JUNOS exam covers 7 domains. Juniper publishes the objective list but not a per-domain weighting, so the table below pairs the official objectives with the number of questions in our practice bank. Those counts are our allocation — they are not a prediction of how the real exam splits its 65 questions.

Domain	Practice Qs
Networking Fundamentals	32
Junos OS Fundamentals	31
User Interfaces	35
Configuration Basics	43
Operational Monitoring & Maintenance	35
Routing Fundamentals	39
Routing Policy & Firewall Filters	35
Total	250

💡 Study tip: Configuration Basics has the largest practice pool here, and the commit-based configuration model is the biggest mental shift for anyone arriving from IOS — start there. Every objective is testable, so don’t skip the smaller sections.

Practice Exam — 250 Questions

Prepare for the JNCIA-JUNOS with our 250-question practice exam covering all 7 exam domains. Every question includes detailed explanations and maps to official exam objectives.

What you get:

✅ Exam simulation mode with timer
✅ Spaced repetition for weak areas
✅ Detailed explanations for every question
✅ Progress tracking across domains
✅ 20 free questions — no account needed

Juniper Certification Path

Juniper follows: Associate (JNCIA) → Specialist (JNCIS) → Professional (JNCIP) → Expert (JNCIE). Start with JNCIA-Junos.

If you’re studying for the JNCIA-JUNOS, you might also be interested in these Juniper certifications:

JNCIS-ENT: Juniper Networks Certified Specialist, Enterprise Routing and Switching (JNCIS-ENT) — 249 practice questions
JNCIP-SEC: Juniper Networks Certified Professional, Security (JNCIP-SEC) — 250 practice questions

Study Tips

Start with the heaviest domain — focus your time where the exam focuses its questions
Use our practice exam — try the 20 free questions first to gauge your readiness
Review explanations — don’t just check if you got it right; read why each answer is correct
Simulate exam conditions — use the timed exam mode to practice under pressure
Check the official page — official exam details always have the latest objectives

Frequently asked questions

The JNCIA-Junos questions I get most often — usually from network engineers asking ‘is Juniper worth learning if I’m Cisco-trained?’ and ‘where does this fit in my career?’

Is JNCIA-Junos worth taking if I already have CCNA? #

Depends on your target jobs. Service providers (Comcast, BT, AT&T), large enterprises with multi-vendor backbones, and Juniper-shop MSPs value JNCIA holders. If you’re heading into a Cisco-only enterprise or general IT support, CCNA pays back faster. JNCIA validates Junos OS specifically — different CLI, different configuration model, different troubleshooting style than IOS. Many senior network engineers carry both because real backbones are rarely single-vendor.

How hard is JNCIA-Junos compared to CCNA? #

Slightly easier in scope (90 minutes / 65 questions vs CCNA’s 120 minutes / 100+ questions) but more focused on Junos OS specifics. Routing concepts overlap heavily — BGP, OSPF, IS-IS, routing policy, firewall filters. The biggest mental shift is Junos’s commit-based configuration model (you stage changes, then commit) and the hierarchical config tree. If you’re comfortable with CLI and routing fundamentals, expect 4 to 8 weeks of part-time prep.

How much does the JNCIA-Junos exam cost? #

Juniper doesn’t publish the exam fee on its certification pages, so check the current price for your country when you book through Pearson VUE. Juniper periodically runs free voucher promotions through their Open Learning portal — sign up for an account and watch for promo emails. The cert is valid 3 years and renewable by passing the current version or progressing to a higher-level Juniper cert (JNCIS or above) in the same track.

What Junos OS version should I study? #

Junos OS 21.2. The current exam is JN0-106, which replaced JN0-105 on 6 April 2026, and Juniper’s official exam page lists Junos OS 21.2 as the software version it is written against — so treat 21.2 as your baseline rather than the newest release you can download. Practising on a later release is fine, because the associate-level fundamentals (the CLI, the configuration hierarchy, the commit model, routing basics) are stable across versions, but check anything version-specific against 21.2. Use Juniper’s free vSRX trial or Juniper Open Learning labs to practise hands-on.

Does JNCIA-Junos lead to a clear career path? #

Yes — Juniper’s certification ladder is clean: JNCIA (associate) → JNCIS (specialist, choose a track such as Enterprise Routing & Switching, Service Provider, Security, Data Center, or Cloud) → JNCIP (professional) → JNCIE (expert, includes a hands-on lab exam). Most service-provider network engineers stop at JNCIP-SP, which carries serious weight in the industry. JNCIE is the credential equivalent of CCIE and takes 2 to 4 years of dedicated study.