JNCIA JUNOS EXAM OBJECTIVESNetworking Fundamentals

Identify the concepts and functionality of various fundamental elements of networking

o Collision domains and broadcast domainso Function of routers and switcheso Optical network fundamentals – SONET/SDH, OTNo Ethernet networkso Layer 2 addressing, including address resolutiono IPv4 and IPv6 fundamentalso Layer 3 / IP addressing, including subnet maskso Subnetting and supernettingo Decimal to binary conversiono Longest match routingo Connection-oriented vs. connectionless protocols

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

Junos OSo Junos device portfolio – product families, general functionalityo Software architectureo Control and forwarding planeso Routing Engine and Packet Forwarding Engineo Protocol daemonso Transit traffic processingo Exception traffic

User Interfaces Identify the concepts, operation and functionality of the Junos user interfaceso CLI functionalityo CLI modeso CLI navigationo CLI Helpo Filtering outputo Active vs. candidate configurationo Reverting to previous configurationso Modifying, managing, and saving configuration fileso Viewing, comparing, and loading configuration fileso J-Web – core/common functionality

Junos Configuration Basics Identify the main elements for configuring Junos deviceso Factory-default stateo Initial configurationo User accountso Login classeso User authentication methodso Interface types and propertieso Configuration groupso Additional initial configuration elements – NTP, SNMP, syslog, etc.o Configuration archivalo Logging and tracingo Rescue configuration Describe how to configure basic components of a Junos device

Operational Monitoring and Maintenance Identify methods of monitoring and maintaining Junos deviceso Show commandso Monitor commandso Interface statistics and errorso Network tools – ping, traceroute, telnet, SSH, etc.o Real-time performance monitoring (RPM)o Junos OS installationo Software upgradeso Powering on and shutting down Junos deviceso Root password recovery Describe monitoring and maintenance procedures for a Junos device

Routing Fundamentals Identify basic routing concepts and functionality for Junos deviceso Packet forwarding conceptso Routing tableso Routing vs. forwarding tableso Route preferenceo Routing instanceso Static routingo Advantages of / use cases for dynamic routing protocols Describe how to configure and monitor basic routing elements for a Junos

device

Routing Policy and Firewall Filters Identify the concepts and functionality of routing policy and firewall filters on

Junos deviceso Default routing policieso Import and export policieso Routing policy flowo Effect of policies on routes and routing tableso Policy structure and termso Policy match criteria, match types, and actionso Firewall filter conceptso Firewall filter conceptso Filter match criteria and actionso Effect of filters on packetso Unicast reverse-path-forwarding (RPF) Describe how to configure and monitor routing policies and firewall filters on

a Junos device