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

  • Exam Code: JN0-103
  • Exam Name: Junos, Associate (JNCIA-Junos)
  • Updated: Aug 18, 2026
  • Q & A: 141 Questions and Answers

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

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Juniper JN0-103 Exam Topics:

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

Describe how to configure or monitor routing policies and firewall filters on a Junos device

Routing FundamentalsIdentify basic routing concepts or functionality for Junos devices
  • Traffic forwarding concepts
  • Routing tables
  • Routing versus forwarding tables
  • Route preference
  • Routing instances
  • Static routing
  • Advantages of and use cases for dynamic routing protocols

Describe how to configure or monitor basic routing elements for a Junos device

Operational Monitoring and MaintenanceIdentify methods of monitoring or maintaining Junos devices
  • Show commands
  • Monitor commands
  • Interface statistics and errors
  • Network tools, such as ping, traceroute, telnet, SSH, and so on
  • Junos OS installation and upgrades
  • Powering on and shutting down Junos devices
  • Root password recovery

Describe monitoring or maintenance procedures for a Junos device

User InterfacesIdentify the concepts, operation or functionality of the Junos user interface
  • CLI functionality
  • CLI modes
  • CLI navigation
  • CLI Help
  • Filtering output
  • Active versus candidate configuration
  • Reverting to previous configurations
  • Modifying, managing, and saving configuration files
  • Viewing, comparing, and loading configuration files
  • J-Web (core/common functionality only)
Junos OS FundamentalsIdentify the concepts, benefits or functionality of the core elements of the Junos OS
  • Software architecture
  • Control and forwarding planes
  • Routing Engine and Packet Forwarding Engine
  • Transit traffic processing
  • Exception traffic
Configuration BasicsIdentify the main elements for configuring Junos devices
  • Factory-default state
  • Initial configuration
  • User accounts
  • Login classes
  • User authentication methods
  • Interface types and properties
  • Configuration groups
  • Additional initial configuration elements, such as NTP, SNMP, and syslog
  • Configuration archival
  • Logging and tracing
  • Rescue configuration

Describe how to configure basic components of a Junos device

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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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Details for JN0-103 Test

Such a test extended to candidates through Pearson VUE includes 65 MCQs and is to end after 1.5 hours. Also, there are certain skill sets meant to be achieved by taking this exam. This will only come by when you check out the domains for JN0-103 and go deeper into them. Thus, these topics include:

  • Fundamentals of Junos OS;
  • Routing basics in addition to firewall filters;
  • User interfaces;
  • Routing fundamentals;
  • Operational monitoring as well as maintenance.
  • Configuration basics;

For a better dive into these objectives, the official course along with exceptional study guides have been collected for you. It’s common knowledge that revision is best carried out through trustworthy means of preparation and materials so we’ll be dealing only with the quality training as well as prep guides below.

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.

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

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