Resources - JNCIA-JUNOS Exam Objectives (Exam: JN0-100)

This list is intended to provide a general view of the skill set required to successfully complete the specified certification exam. Topics listed are subject to change.

• JUNOS Software Fundamentals
• User Interface Options
• Initial Configuration and Network Interfaces
• Secondary System Configuration
• Operational Monitoring and Maintenance
• Routing Fundamentals
• Routing Policy and Firewall Filters
• Class of Service
• Networking Fundamentals

JUNOS Software Fundamentals

• Explain the JUNOS Software architecture.
• Describe the funtions of the control and forwarding planes.
• Describe traffic processing within a JUNOS device.

User Interface Options

• Describe the functions of the CLI modes.
• List options for getting help and filtering output.
• Explain options for moving around in the CLI.
• Explain the JUNOS batch configuration model.
• Modify and manage configuration files.
• Describe the J-Web user interface.

Initial Configuration and Network Interfaces

• Describe the factory-default configuration.
• Identify initial configuration steps.
• Save and restore a rescue configuration.
• Describe network interfaces and their associated properties.
• Configure various types of interfaces

Secondary System Configuration

• List and describe user authentication methods.
• Configure user accounts with default and custom login classes.
• Identify key details for system logging and tracing.
• Configure and monitor syslog and tracing.
• Describe secondary configuration tasks such as NTP, SNMP, and configuration archival.
• Configure and monitor secondary configuration tasks such as NTP, SNMP, and configuration archival.

Operational Monitoring and Maintenance

• Explain how to view relevant interface statistics and errors in the CLI
• List ways of gathering state and health information for a JUNOS device
• Explain the purpose and syntax for various network utilities such as ping, traceroute, telnet, ssh etc.
• Explain how loopback testing works
• Identify the procedure for installing or upgrading JUNOS
• Explain how to reset a lost root password

Routing Fundamentals

• Explain the how routing protocols interact with inet.0
• Define route protocol preference and list some default route preferences
• Explain how to view the contents of the routing table
• Explain how the routing and forwarding tables differ
• Explain how a qualified next hop works
• List the advantages and applications of a dynamic routing protocol

Routing Policy and Firewall Filters

• Define a term
• Explain when import and export policies are evaluated in relation to the learning and advertising of prefixes.
• List several match criterion and their purpose
• Explain some common match actions and what they do
• Identify the fate of a route or packet with a given filter or policy
• Configure a routing policy/Firewall to achieve a desired result
• Demonstrate how to reorder and rename terms within a policy/firewall

Class of Service

• Explain the order of operations for CoS processing
• Explain the purpose of classification, rewrites and queing
• Configuration and Monitoring CoS
• Configure a scheduler
• Configure and apply a scheduler map
• View active queues on the router

Networking Fundamentals

• Convert decimal to binary and binary to decimal
• Define the term broadcast domain and the purpose of a router
• Describe Ethernet operation
• Describe the purpose of the subnet mask
• Compare and contrast connection oriented and connnectionless protocols
• Explain how to segment large networks into smaller ones
• Identify the longest match from a routing table for a given destination