Your JNCIA-Junos (JN0-102) Study Tracker


If you know anything about my approach to certifications, you will know that I am a huge proponent of building a tracker to make sure you are studying the right topics and to measure your progress and keep yourself accountable.

NOTE: I only show Section 1 below on my blog home page – you might need to click the READ MORE link in order to see the other sections.

Section 1: Networking Fundamentals

Identify the concepts and functionality of various fundamental elements of networking

  • The 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

Section 2: Junos OS Fundamentals

Identify the concepts, benefits, and functionality of the core elements of the Junos OS

  • Juno’s 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

Section 3: 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

Section 4: Junos Configuration Basics

Identify the main elements of 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

Section 5: Operational Monitoring and Maintenance

Show commandsIdentify methods of monitoring and maintaining Junos devices

  • 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

Section 6: 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

Section 7: Routing Policy and Firewall Filters

Default routing policiesIdentify the concepts and functionality of routing policy and firewall filters on Junos devices

  • 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 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

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