Juniper Networks Certified Associate Junos (JNCIA-Junos) JN0-102


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Juniper Networks Certified Associate Junos (JNCIA-Junos) JN0-102 certifications is designed for networking professionals those who are intrested to work with Juniper Products. This exam validates the candidates skills in networking fundamentals and core functionality of Juniper's Junos OS. This certification is valid for three years.

Exam Details

Required Exam(s) : JN0-102 Junos
Associated Exams : ---
Durations : 90 mins ( 70 questions)
Question Types : Multiple choice Questions.
Exam Fees :
Prerequired Exams :There is no prerequired exams to take JNCIA Junos JN0-102 Certifications.
Exam Policy : Click here to read the Exam policies.
Recommended Training : Introduction to the Junos OS (IJOS), Junos Routing Essentials (JRE), Networking Fundamentals

Exam Pattern

Below are the exam pattern of JNCIA Junos JN0-102 exam.

1.0 Networking Fundamentals

Identify the concepts and functionality of various fundamental elements of networking
  • Collision domains and broadcast domains
  • Function of routers and switches
  • Optical network fundamentals – SONET/SDH, OTN
  • Ethernet networks
  • Layer 2 addressing, including address resolution
  • IPv4 and IPv6 fundamentals
  • Layer 3 / IP addressing, including subnet masks
  • Subnetting and supernetting
  • Decimal to binary conversion
  • Longest match routing
  • Connection-oriented vs. connectionless protocols

2.0 Junos OS Fundamentals

Identify the concepts, benefits and functionality of the core elements of the Junos OS
  • Junos device portfolio – product families, general functionality
  • Software architecture
  • Control and forwarding planes
  • Routing Engine and Packet Forwarding Engine
  • Protocol daemons
  • Transit traffic processing
  • Exception traffic

3.0 User Interfaces

Identify the concepts, operation and functionality of the Junos user interfaces
  • CLI functionality
  • CLI modes
  • CLI navigation
  • CLI Help
  • Filtering output
  • Active vs. candidate configuration
  • Reverting to previous configurations
  • Modifying, managing, and saving configuration files
  • Viewing, comparing, and loading configuration files
  • J-Web – core/common functionality

4.0 Junos Configuration Basics

Identify 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 – NTP, SNMP, syslog, etc.
  • Configuration archival
  • Logging and tracing
  • Rescue configuration
Describe how to configure basic components of a Junos device
Operational Monitoring and Maintenance
Identify methods of monitoring and maintaining Junos devices
  • Show commands
  • Monitor commands
  • Interface statistics and errors
  • Network tools – ping, traceroute, telnet, SSH, etc.
  • Real-time performance monitoring (RPM)
  • Junos OS installation
  • Software upgrades
  • Powering on and shutting down Junos devices
  • Root password recovery
Describe monitoring and maintenance procedures for a Junos device

Routing Fundamentals

Identify basic routing concepts and functionality for Junos devices
  • Packet forwarding concepts
  • Routing tables
  • Routing vs. forwarding tables
  • Route preference
  • Routing instances
  • Static routing
  • Advantages of / use cases for dynamic routing protocols
Describe how to configure and monitor basic routing elements for a Junos device

Routing Policy and Firewall Filters

Identify the concepts and 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
  • Firewall filter concepts
  • Filter match criteria and actions
  • Effect of filters on packets
  • Unicast reverse-path-forwarding (RPF)
Describe how to configure and monitor routing policies and firewall filters on a Junos device

Books to Prepare

Below are the recommended books for preparing JNCIA Junos JN0-102 Exam.

CCDA Cover Image

Book Name : JNCIA-Junos Study Guide

Author Name :

Publisher : Juniper Inc

Download : Ebook Download

Topics Covered in this book:

  • Junos Operating System Fundamentals
  • User Interface Options
  • Initial Configuration
  • Secondary System ConfigurationData Center Design
  • Operational Monitoring and MaintenanceWireless LAN Design
  • Routing Fundamentals
  • Routing Policy
  • Firewall Filters

Softwares for Practice

Very few softwares are available to practice Junos Exams.

Software Name : Junos Olive

License : Open Source

How to Install :

Juniper is not officially offering any simulators to pratice, eventhough you can practice by using juniper's development testing Software called Olive.
You can download olive and configure it on FreeBsd 4.0.

Click here to view how to setup Junos olive

Software Name : MIMIC Junos Simulator

License : Paid Version

Software Features :

Click here for the Pricing and Feature Details of Mimic Simulators