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The Juniper JN0-421 exam is for seasoned networking specialists looking to validate the knowledge of automation tools and IT best practices. This path is for you if you want to demonstrate your ability to apply a ton of scripting tools including Python, Ansible, and PyEZ to Juno networks and devices. On that note, passing this exam will earn you the Juniper Networks Certified Internet Specialist - DevOps certification.

Vital Exam Facts

Like virtually all Juniper exams, the Juniper JN0-421 exam has a 90-minute duration and presents 65 questions in multiple-choice format. Candidates are graded on a Pass/Fail basis and they can take the exam at the Pearson VUE website. Passing this test demands background experience working with the Junos Software Release 18.3.

Knowledge Areas

Listed below are the 8 major objectives that will be addressed by the Juniper JN0-421 exam:

• Python;
• Platform Automation Overview;
• NETCONF/XML API;
• Data Serialization and Templating;
• Juniper Extension Toolkit;
• YANG/OpenConfig;
• Junos Automation Scripts;
• Stateful Configuration (Ansible/SALT).

Certification Overview: Juniper Networks Certified Internet Specialist - DevOps

The Juniper Networks Automation and DevOps certification path has two broad tracks - the Juniper Networks Certified Internet Associate - DevOps and Juniper Networks Certified Internet Specialist - DevOps. The JNCIS-DevOps certificate is intended to assess the mastery of automation tools and the relevant best practices. Generally, this path allows IT specialists to showcase their mastery of popular scripting tools and languages that will be crucial when automating devices and network functions. Successful exam-takers will therefore become critical team players in many organizations and will be able to apply different automation concepts to the functional Junos networks and devices.

Recommended Training Courses

If you are unsure which course to use, here’s our detailed review of the Junos Platform Automation and DevOps (JAUT), the recommended training for guaranteed exam success, that has the following features:

• Junos Platform Automation and DevOps (JAUT)

  Junos Platform Automation and DevOps (JAUT) is a five-day training program that gives meticulous coverage of the Junos technology as it relates to DevOps tools for automation, technologies, and protocols. It is intended to give the candidates in-depth practical experience in working with various tools and languages that will be crucial to optimizing the Junos OS platform within a given DevOps environment. And to do this, it gives a brief overview of the Jinja2 templates and detailed coverage of Salt, JSNAPy, and Ansible automation tools concerning the Junos OS. The two dominant languages throughout this course include Python and SLAX, which are discussed in detail to ensure the trainees are better equipped to face the actual exam. It should be stated that this course is exclusively built around the Junos PyEZ 2.2, Ansible 2.7, and Junos OS Release 18.3R1 and as such, having a background experience with these concepts would help. The target audience for this course is obviously experienced IT specialists who are keen to configure and monitor devices operating on the Junos OS. And for that reason, they should demonstrate the following skills:

  • Mid-level networking knowledge;
  • Mastery of the TCP/IP suite and Open Systems Interconnection (OSI) model;
  • Successful completion of the relevant beginner-level course, Introduction to Junos Platform Automation and DevOps (IJAUT).

Also, Juniper recommends that aspiring candidates should have some form of experience working with the products listed below:

• Software;
• Automation;
• Junos OS;
• PTX Series;
• MX Series;
• Switching.

Let’s now see what you will cover throughout the 5-day study period:

Day 1

On the first day, the course will start with a basic introduction. This is meant to give the candidates a glimpse of what the entire journey will entail as they prepare to face their exams. Then, the instructors will delve into the details of Junos Automation Fundamentals, Jinja2, and Advanced Junos PyEZ. Here, you should be prepared to cover such concepts as the benefits of Automation, Junos Automation Stack, Junos Automation Tools, Jinja2 Overview, Jinja2 Syntax, Junos PyEZ Utilities, and RPCs among the rest.

Day 2

As for the second day, the training will give in-depth coverage of the Ansible Intermediate, SLAX, Junos Op Scripts, and Junos Commit Scripts. At this point, the instructors will be willing to expose you to the essential concepts of playbook flow control, case study, the fundamentals of SLAX, SLAX versions, and custom configuration syntax among other subtopics.

Day 3

The third session of JN0-421 certification exam prep using this class means more emphasis on the Junos SNMP Scripts, Junos Event Policies & Event Scripts, and Salt. At this stage, students will understand how to manage Junos OS events, event scripts, Junos OS SNMP scripts, Junos and Salt, and the Junos execution model.

Day 4

On the fourth day, the instructors will focus on 3 major skills including JSNAPy, OpenConfig, and YANG. If you have some background experience working with configuration files, test files, Junos YANG modules, OpenConfig package, and OpenConfig telemetry, then you shouldn’t have any problem mastering these concepts.

Day 5

Day 5 marks the end of your certification exam prep using the Junos Platform Automation and DevOps (JAUT) course. So, this part will be more of a conclusion than the actual training. However, this session still focuses on vital concepts that will determine your chances of success in the official exam. For instance, Juniper Extension Toolkit and Junos Telemetry will be covered in this session. This means that candidates must be familiar with the concepts of JET Service API, JET Notification API, Native Sensors for JTI, and OpenConfig and gRPC Sensors for JTI to complete their training in style.

Conclusion

Passing the Juniper JN0-421 test has much more to it than just attaining the desired certificate. It is a massive step towards fulfilling your potential as a competent IT professional with advanced knowledge of Junos Automation and DevOps concepts. By reviewing the exam objectives as covered in this post, getting the right study material, and preparing adequately for the final exam, success in it should be guaranteed. If you want to build confidence and gain extra motivation to help you pass such a test, choose the recommended online course as covered above. That’s the surest way to crack this exam. Time to nail the test like a pro!

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