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Updated: Sep 19, 2026
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Juniper JN0-421 exam is a comprehensive test designed to evaluate your skills in automation and DevOps, with a focus on Juniper Networks technologies. By earning this certification, you will demonstrate your expertise in network automation and DevOps practices, which can lead to career advancement opportunities and increased earning potential.
Reference: https://www.juniper.net/us/en/training/certification/certification-tracks/devops?tab=jncis-devops
Juniper JN0-421 Exam Overview:
| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Juniper Automation and DevOps, Specialist (JNCIS-DevOps) |
| Exam Number: | JN0-421 |
| Available Languages: | English |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Passing Score: | 65% |
| Real Exam Qty: | 65 |
| Exam Format: | Multiple-choice questions |
| Related Certifications: | JNCIP-DevOps JNCIA-DevOps |
| Exam Price: | $150 USD |
| Recommended Training: | Juniper Learning Portal - DevOps Track Introduction to Junos Automation and DevOps (IJAUT) |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Juniper JN0-421 Sample Questions |
| Exam Way: | Onsite at Pearson VUE test centers or online proctored |
| Pre Condition: | Valid JNCIA-DevOps certification |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/tracks/devops/jncis-devops.html |
Juniper JN0-421 (Automation and DevOps, Specialist (JNCIS-DevOps)) Certification Exam is designed to validate the skills and knowledge of the candidates in the field of automation and DevOps. Automation and DevOps, Specialist (JNCIS-DevOps) certification exam is intended for individuals who have a strong understanding of the principles and practices of automation and DevOps and are looking to advance their careers in this field. JN0-421 exam tests the candidates on various topics related to automation, scripting, and DevOps practices, which are essential for building and managing modern networks.
Juniper JN0-421 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Python Automation | 20% | - JSNAPy - Configuration management - Junos PyEZ library - RPC execution |
| Topic 2: YANG Models and Data Formats | 15% | - JSON, XML, YAML - YANG model concepts - Jinja2 templating - OpenConfig |
| Topic 3: JET and Orchestration Tools | 15% | - Ephemeral configuration - Terraform basics - Ansible for Junos - Juniper Extension Toolkit (JET) |
| Topic 4: Junos Automation Scripts | 15% | - Commit scripts - SNMP scripts - Op scripts - Event scripts |
| Topic 5: Platform Automation Overview | 15% | - Junos automation architecture - Telemetry concepts - JSD-based automation - MGD-based automation |
| Topic 6: NETCONF, RESTCONF, and APIs | 20% | - NETCONF protocol - XML API - gRPC and gNMI - REST API / RESTCONF |
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