Juniper JN0-103 : Junos, Associate (JNCIA-Junos)

JN0-103 real exams

Exam Code: JN0-103

Exam Name: Junos, Associate (JNCIA-Junos)

Updated: Aug 03, 2026

Q & A: 141 Questions and Answers

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Exam Topics

The JN0-103 certification exam evaluates the students’ understanding of a wide range of skill areas. They are combined in a number of topics that are briefly discussed below:

  • Junos OS Fundamentals

    Answering the questions within this objective, the test takers need to confirm their ability to define the concepts, functionality, or benefits of the key components of the Junos operating system. These include software architecture, packet forwarding engineer and routing engineer, control & forwarding planes, exception traffic, and transit traffic processing.

  • Routing Fundamentals

    This section includes identifying the basic functionality or routing concepts for Junos devices, describing how to monitor or configure basic routing elements for them. Also included are static routing, routing instances, route reference, routing vs. forwarding tables, traffic forwarding concepts, as well as use cases and advantages of routing protocols.

  • Operations Monitoring and Maintenance

    This topic evaluates the candidates’ skills in identifying the methods of maintaining or monitoring Junos devices, as well as monitoring and showing commands. They need to demonstrate their understanding of interface statistics & errors, Junos OS installation and upgrades, network tools, such as SSH, telnet, ping, traceroute, and so on. The learners also need to demonstrate their ability to describe maintenance and monitoring procedures for a Junos device, as well as shutting down and powering Junos devices.

  • Routing Policies and Firewall Filters

    This area includes identifying the functionality or concepts of firewall filters and routing policy on Junos devices. Answering the questions within this objective, the individuals should demonstrate their competency in describing how to monitor or configure firewall filters and routing policies on a Junos device, unicast reverse-path-forwarding (RPF), effects of filters on packets, filter match criteria and actions, filter structure & terms, firewall filter concepts, policy match criteria, actions, and match types, policy structure and terms, routing policy flow, import and export policies, and default routing policies.

  • User Interfaces

    Within this subject area, the applicants are expected to demonstrate that they possess the ability to define the concepts, functionality, or benefits of the Junos user interface. This includes CLI functionality, navigation, modes, and help. They also need to show that they are well-conversant with filtering output, reverting to prior configurations, active versus candidate configuration, managing, modifying, and saving configuration files, and loading, comparing, and viewing files. They also need to demonstrate their understanding of J-Web (common/core functionality only).

  • Configuration Basis

    In the framework of this knowledge domain, the students need to validate their competency in identifying the major elements for configuring Junos devices. This means that they will be answering questions that focus on factory-default state, user accounts, initial configuration, login classes, user types & properties, user authentication methods, configuration groups, rescue configuration, logging and tracing, configuration archival, and additional initial configuration elements, such as Syslog, SNMP, and NTP.

Introduction to Juniper JN0-103: Junos, Associate (JNCIA-Junos) Exam

Juniper JN0-103: Junos, Associate (JNCIA-Junos) Exam is related to JNCIA-Junos Certification. This exam validates the Candidate knowledge and skills of networking fundamentals, core functionality of the Juniper Networks Junos OS.

Exam Details

The Juniper JN0-103 exam can be taken in the English language. It is available to the individuals at a price of $200. This amount is applicable to the United States but may vary in other countries. Those students who are applying for this certification test in other countries should check the official website to find out its actual cost. The exam is proctored by Pearson VUE, a Juniper testing partner.

As for the structure, the test consists of about 65 multiple-choice questions. They are presented as multiple-choice items. All the questions included in the exam content are to be completed within the allocated duration of 90 minutes. The passing score for the test is subject to change and varies between 60% and 70%.

To prepare for the Juniper JN0-103 exam efficiently, the applicants can choose a variety of study approaches. For starters, the learners are recommended to sign up for the official training course, which is offered on the Juniper website. “Introduction to the Junos OS (IJOS)” is a paid instructor-led course developed for those individuals with intermediate or basic knowledge of networking or the candidates who are already working as the networking professionals.

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Juniper JN0-103: Junos, Associate (JNCIA-Junos) Exam topics

Candidates must know the exam topics before they start of preparation. Because it will help them in hitting the core. Our Juniper JN0-103 exam dumps will include the following topics:

Identify the concepts, benefits or functionality of the core elements of the Junos OS

  • Transit traffic processing
  • Control and forwarding planes
  • Software architecture
  • Exception traffic
  • Routing Engine and Packet Forwarding Engine

Identify the concepts, operation or functionality of the Junos user interface

  • CLI navigation
  • J-Web (core/common functionality only)
  • CLI functionality
  • CLI modes
  • Reverting to previous configurations
  • Filtering output
  • CLI Help
  • Viewing, comparing, and loading configuration files
  • Active versus candidate configuration
  • Modifying, managing, and saving configuration files

Identify the main elements for configuring Junos devices

  • Configuration groups
  • User authentication methods
  • Logging and tracing
  • User accounts
  • Configuration archival
  • Initial configuration
  • Login classes
  • Factory-default state
  • Additional initial configuration elements, such as NTP, SNMP, and Syslog
  • Rescue configuration
  • Interface types and properties

Identify the concepts or functionality of routing policy and firewall filters on Junos devices

  • Filter structure and terms
  • Filter match criteria and actions
  • Firewall filter concepts
  • Import and export policies
  • Effect of filters on packets
  • Routing policy flow
  • Policy structure and terms
  • Effect of policies on routes and routing tables
  • Unicast reverse-path-forwarding (RPF)
  • Policy match criteria, match types, and actions
  • Default routing policies

Reference: https://www.juniper.net/us/en/training/certification/certification-tracks/ent-routing-switching-track?tab=jnciajunos

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Juniper JN0-103 Exam Syllabus Topics:

SectionObjectives
Topic 1: Operational Monitoring and Maintenance- Monitoring interfaces and errors
- Using show and monitor commands
Topic 2: Routing Policy and Firewall Filters- Firewall filter concepts and actions
- Policy structure and match criteria
Topic 3: Junos OS Fundamentals- Packet processing and exception traffic
- Junos OS architecture (control and forwarding planes)
Topic 4: Routing Fundamentals- Traffic forwarding and routing tables
- Static and dynamic routing concepts
Topic 5: User Interfaces- CLI modes and navigation
- Configuration and operational commands
Topic 6: Configuration Basics- System services (NTP, SNMP, syslog)
- Initial device configuration
- User accounts and authentication
Topic 7: Networking Fundamentals- Switching and routing basics
- Fundamental network concepts (collision domains, broadcast domains)
- Layer 2 and Layer 3 addressing (IPv4/IPv6, subnetting)

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