Juniper Junos Associate (JNCIA-Junos JN0-105) Practice Exam

The Juniper Junos Associate (JNCIA-Junos JN0-105) is a professional certification that shows foundational knowledge of Juniper Networks’ Junos operating system and networking principles. It shows that a person can configure, manage, and troubleshoot Junos-based devices, making it ideal for network engineers, IT professionals, and aspiring network administrators. This certification is perfect for those who want to start a career in networking with Juniper technologies.

Recognized globally, the JNCIA-Junos certification helps professionals stand out in entry-level networking roles. By earning this credential, individuals demonstrate the ability to understand networking fundamentals, manage interfaces, and troubleshoot basic network issues. Organizations benefit from certified professionals who can maintain reliable network operations, optimize connectivity, and ensure the smooth functioning of Juniper network devices.

Who should take the Exam?

This exam is ideal for:

• Network Administrators
• Network Engineers
• Systems Engineers
• Technical Support Engineers
• IT Professionals Seeking Juniper Certification

Skills Required

• Networking Fundamentals
• Junos OS Fundamentals
• User Interface Navigation (CLI & J-Web)
• Device Configuration Basics
• Operational Monitoring & Maintenance
• Routing Fundamentals
• Routing Policy & Firewall Filters

Knowledge Gained

• Junos OS Architecture
• Routing & Forwarding Tables
• Static & Dynamic Routing Protocols
• Routing Instances
• Routing Policy Configuration
• Firewall Filter Implementation
• Interface Configuration & Monitoring
• System Maintenance Procedures

Course Outline

The Juniper Junos Associate (JNCIA-Junos JN0-105) Exam covers the following topics - 

Domain 1 - Understanding Networking Fundamentals

• Collision domains and broadcast domains
• The Function of routers and switches
• Ethernet networks
• Layer 2 addressing, including address resolution
• Layer 3 / IP addressing including subnet masks
• Ipv4 / ipv6
• Subnetting and supernetting
• Decimal to binary conversion
• Longest match routing
• Cos
• Connection-oriented vs. Connectionless protocols

Domain 2 - Understanding Junos OS Fundamentals

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

Domain 3 - Understanding User Interfaces

• 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)

Domain 4 - Understanding Configuration Basics

• 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
• Configure basic components of a Junos device

Domain 5 - Understanding concept of Operational Monitoring and Maintenance

• 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
• Monitoring or maintenance procedures for a Junos device

Domain 6 - Understanding Routing Fundamentals

• Traffic forwarding concepts
• Routing tables
• Routing versus forwarding tables
• Route preference
• Routing instances
• Static routing
• Advantages of and use cases for dynamic routing protocols
• Configure or monitor basic routing elements for a Junos device

Domain 7 - Understanding Routing Policy and Firewall Filters

• Default routing policies
• Import and export policies
• Routing policy flow
• The 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
• The Effect of filters on packets
• Unicast reverse-path-forwarding (RPF)
• Configure or monitor routing policies and firewall filters on a Junos device