JNCIA-Junos exam topics are based on the content of the recommended instructor-led training courses, as well as the additional resources.

• Exam Code: JN0-103
• Administered by Pearson VUE
• Exam length: 90 minutes
• Exam type: 65 multiple-choice questions
• Scoring and pass/fail status is available immediately
• Junos Software Release: 19.4

Identify 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

Identify 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)

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, such as NTP, SNMP, and syslog
• Configuration archival
• Logging and tracing
• Rescue configuration

Describe how to configure basic components of a Junos device

Identify 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

Identify 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

Identify 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