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

"Junos, Associate (JNCIA-Junos)", also known as JN0-103 exam, is a Juniper Certification. With the complete collection of questions and answers, Pass4sureCert has assembled to take you through 141 Q&As to your JN0-103 Exam preparation. In the JN0-103 exam resources, you will cover every field and category in JNCIA Certification helping to ready you for your successful Juniper Certification.

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  • Updated on: Jul 22, 2026
  • No. of Questions: 141 Questions & Answers

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  • Updated on: Jul 22, 2026
  • No. of Questions: 141 Questions & Answers

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Training Course for JN0-103 Exam

The official preparation course for test JN0-103 is named ‘Introduction to the Junos OS’ and it is to go on for 3 days. It is organized in a way that students undertaking it will gain the foundational comprehension needed in working with the OS for Junos as well as configuring devices for Junos. Besides, this training takes a short coverage of the families for Junos devices and explores the core architectural elements of the associated software. Also, core domains detailed here are such as options for the user interface, which includes a huge focus on the CLI and tasks for the configuration that typically are related to how devices are set up initially. More attention is focused on the basics of interface configuration that comes with examples, building up secondary systems, and the primary details of operational monitoring in addition to maintaining the Junos gadgets. Moreover, there will be a further discussion on foundational knowledge about routing as well as examples of configurations that include general concepts associated with routing, routing policy, as well as firewall filters. It’s to be noted that students will be going into the practical aspects of what they will be learning and in this manner, their skills will be practical. With a commitment to the course content, right motivation, and dedication, the candidates’ chances of passing the official test are going to be high.

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:

  • 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).

  • 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.

  • 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 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.

  • 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.

  • 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.

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:

SectionWeightObjectives
Topic 1: Routing Fundamentals15%- Static routes
- Routing tables and routing information base
- Basic OSPF and RIP concepts
- Route preference and selection
Topic 2: Routing Policy and Firewall Filters15%- Policy structure and terms
- Firewall filter components
- Apply filters and policies
- Match conditions and actions
Topic 3: Junos OS Fundamentals20%- Configuration management
- File system and software installation
- Routing Engine and Packet Forwarding Engine
- Software architecture and process overview
Topic 4: User Interfaces15%- CLI modes and navigation
- Configuration and operational modes
- Filtering and output management
- Help system and autocomplete
Topic 5: Networking Fundamentals20%- Ethernet and Layer 2 addressing
- Longest match routing
- Connection-oriented vs connectionless protocols
- Router and switch functions
- Collision and broadcast domains
- IPv4/IPv6 addressing and subnetting
Topic 6: Configuration Basics15%- Activate, save, and revert configurations
- Interface configuration
- System parameters and user accounts
- Configuration hierarchy

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