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JNCIA-Junos JN0-102 Practice Exam - RETIRED

JNCIA-Junos JN0-102

About JNCIP-ENT JN0-102 Exam

JN0-102 exam is a certification program that allows the potential participants to demonstrate competence with advanced data center technologies and related configuration and troubleshooting skills. The successful candidates demonstrate their advanced knowledge of the Junos OS used in a data center environment.


Target Audience

The exam is designed for experienced networking professionals with advanced knowledge of the Juniper Networks Junos OS. The written exam verifies the candidate understanding of advanced routing technologies and related platform configuration and troubleshooting skills. The individuals obtain this certification to advance to the security certs. 


Prerequisite for the exam

Candidates who wish to appear for JN0-102 exam are required to pass JNCIS-ENT certification exam. 


Course Structure

1. 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. 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. 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. 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


5. 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


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


7. 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

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


Exam Pattern 

  • Exam Name: Enterprise Routing and Switching, Professional (JNCIP-ENT) 
  • Exam Code: JN0-102
  • Number of Questions: 65
  • Length of Time:  90 Minutes


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