JN0-106 Certification Exam Guide + Practice Questions Updated 2026

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Comprehensive JN0-106 certification exam guide covering exam overview, skills measured, preparation tips, and practice questions with detailed explanations.

What is the JN0-106 Exam?


The JN0-106 exam is for the Juniper Networks Certified Associate – Junos (JNCIA-Junos) credential, which is designed to validate your foundational knowledge of networking concepts and their understanding of the core functionality of the Juniper Networks Junos OS. Passing the JN0-106 exam demonstrates that you can work with Junos devices in real-world environments, perform basic configurations, and monitor network operations effectively. It serves as an entry point into the Juniper certification track and lays the groundwork for more advanced certifications.

Who Is the Exam For?


The JN0-106 exam is ideal for:

● Entry-level networking professionals
● System administrators transitioning into networking roles
● IT professionals working with Juniper devices
● Students or beginners pursuing a career in networking
● Anyone looking to build a strong foundation in Junos OS

If you have basic networking knowledge and want to validate your skills in a Juniper environment, this exam is a great starting point.

Exam Overview


Here are the key details of the JN0-106 exam:

Number of Questions: 65 multiple-choice questions
Duration: 90 minutes
Software Version: Junos OS 21.2
Language: English
Delivery: Pearson VUE
Result: Pass/fail status provided immediately after completion

The exam focuses on both theoretical understanding and practical knowledge required to operate Junos-based devices.

Skills Measured


The JN0-106 exam tests your knowledge across several core areas:

Networking Fundamentals
Understanding of basic networking concepts such as OSI model, TCP/IP, and common protocols.

Junos OS Fundamentals
Familiarity with the architecture and key features of the Junos operating system.

User Interfaces
Ability to navigate and use the CLI (Command Line Interface) and J-Web interface.

Configuration Basics
Knowledge of initial device setup, configuration modes, and committing changes.

Operational Monitoring and Maintenance
Skills in monitoring system performance and performing basic troubleshooting.

Routing Fundamentals
Understanding of routing concepts and protocols such as static and dynamic routing.

Routing Policy and Firewall Filters
Basic knowledge of traffic control, filtering, and policy implementation.

How to Prepare for This JN0-106 Exam?


Preparing for the JN0-106 exam requires a mix of theory and hands-on practice. Here's how you can approach it:

Start by building a strong foundation in networking concepts such as IP addressing, subnetting, and routing. Then, focus on learning Junos OS fundamentals, including system architecture and configuration workflows.

Hands-on experience is crucial. Practice using the Junos CLI, configure devices in a lab environment, and simulate real-world scenarios. You can use virtual labs or emulators if physical devices are not available.

Review the official exam objectives carefully and ensure you understand each topic area. Consistent revision and practice will help reinforce your knowledge and improve your confidence.

How to Use JN0-106 Practice Questions?


Practice questions are one of the most effective tools for exam preparation when used correctly. Instead of memorizing answers, focus on understanding the reasoning behind each question.

Start by taking practice tests to assess your current knowledge level. Identify weak areas and revisit those topics in your study materials. Gradually increase your practice intensity as your exam date approaches.

Simulating real exam conditions - timed sessions and minimal distractions - can also help improve your time management and reduce exam-day anxiety.

Practice Questions for JN0-106 Exam


JN0-106 practice questions play a critical role in your preparation by helping you become familiar with the exam format, question styles, and difficulty level. They reinforce your understanding of key concepts and highlight areas that need improvement. Consistent practice not only boosts your confidence but also significantly increases your chances of passing the exam on your first attempt.

Question#1

What is the maximum number of rollback configuration files that the Junos OS will store?

A. 65
B. 50
C. 25
D. 19

Explanation:
Junos OS can store up to 50 rollback configuration files, making B the correct answer. These rollback files allow administrators to revert to previous configurations, providing a safety net that facilitates recovery from configuration errors or undesired changes

Question#2

Exhibit
[edit system archival] user@router# show configuration {
transfer-on-commit; archive-sites {
"scp://[email protected] : /archive" password ## SECRET-DATA
"ftp://[email protected]:/archive" password "$9..."; ## SECRET-DATA.
Referring to the exhibit, where are the configuration backup files stored?
A. Files are stored to the SCP site and the FTP site in a round-robin manner.
B. Files are stored to the SCP site and the FTP site simultaneously.
C. Files are stored to any site as selected by Junos internally.
D. Files are stored to the SCP site but if the transfer fails, then to the FTP site.

A. B

Explanation:
In Junos OS, the archival configuration under [edit system] allows for the automatic backup of configuration files to designated locations upon commit. When multiple archive-sites are specified, as shown in the exhibit with both SCP and FTP sites listed, the device does not choose between them or use them in a round-robin manner. Instead, it attempts to transfer the configuration backup files to all specified sites simultaneously upon each commit. This ensures redundancy and increases the likelihood that a backup will be successfully stored even if one of the transfer methods or destinations fails.

Question#3

What is the primary system log file that is present in the default configuration of a Junos device?

A. kmd
B. messages
C. vrrp
D. jsrpd

Explanation:
In the default configuration of a Junos device, the primary system log file is "messages" (B). This log file contains a wide range of system messages, including operational status changes, system errors, and other critical information, making it a key resource for troubleshooting and monitoring the system's health.

Question#4

Which component is considered part of the data plane?

A. the Routing Engine
B. the Packet Forwarding Engine
C. the power supply
D. the fan tray

Explanation:
The Packet Forwarding Engine (PFE) is an integral component of Juniper Networks devices, responsible for the data plane operations. The data plane, also known as the forwarding plane, is where the actual processing and forwarding of packets occur based on the routing and forwarding tables. The PFE executes the forwarding decisions made by the Routing Engine (RE), handling all packet transmissions, including routing, filtering, and switching packets towards their destination. This contrasts with the control plane operations handled by the RE, which involve routing table maintenance, system management, and control protocol processing.

Question#5

Which service does RADIUS provide?

A. routing
B. authentication
C. DNS resolution
D. time synchronization

Explanation:
RADIUS, which stands for Remote Authentication Dial-In User Service, provides authentication services for users trying to access a network. It is a networking protocol that provides centralized Authentication, Authorization, and Accounting (AAA) management for users who connect and use a network service.

Disclaimer

This page is for educational and exam preparation reference only. It is not affiliated with Juniper, JNCIA-Junos, or the official exam provider. Candidates should refer to official documentation and training for authoritative information.

Exam Code: JN0-106Q & A: 111 Q&AsUpdated:  2026-04-24

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