Juniper JNCIA-Junos (JN0-105) Online Training & Certification Prep
Establish your credentials in Juniper Networks technology with the JNCIA-Junos certification. Our course pairs Certified Partner instruction with Live Labs on real Juniper SRX and EX platform hardware so you practise Junos OS configuration, routing policy, and firewall filters in an authentic environment.
Course Overview
The Juniper Networks Certified Internet Associate — Junos (JNCIA-Junos) is the entry point to the Juniper certification track. Passing the JN0-105 exam demonstrates foundational knowledge of the Junos operating system: its architecture, CLI navigation, routing and switching fundamentals, routing policy, and firewall filters. JNCIA-Junos is a prerequisite or recommended preparation for all Juniper Professional and Specialist certifications across the Enterprise Routing, Service Provider, Security, and Data Centre tracks.
Junos OS is architecturally distinct from other network operating systems. It runs on a hardened FreeBSD kernel with a clear separation between the Routing Engine (RE) and the Packet Forwarding Engine (PFE), and all Juniper platforms — routers, switches, and firewalls — run the same Junos codebase. This consistency means skills transfer directly between the SRX, EX, QFX, MX, and PTX product families. Understanding Junos architecture early in your learning path prevents the misconceptions that arise when engineers trained on other platforms first encounter it.
Boost eLearning’s JNCIA-Junos course covers all six exam domains defined in the JN0-105 exam objectives. Certified Partner instructors who are active Juniper specialists lead the instruction, explaining not only how to enter commands but why the Junos design decisions were made and how they affect operational behaviour. Three modalities support your learning: on-demand video, structured reading materials aligned to each objective, and Live Labs on real Juniper EX-series switches and SRX-series firewalls where you configure and verify Junos features directly through the CLI.
Key topics include the Junos software architecture (daemons, processes, and the separation between RE and PFE), CLI modes and navigation (operational and configuration modes, commit model, rollback), basic interface and routing configuration, static routing and OSPF, routing policy with match conditions and actions (accept, reject, next term), and stateless firewall filters applied to interfaces. The commit model — where configurations are staged and then atomically applied — is a Junos fundamental that Live Lab practice ingrains far more effectively than reading alone.
JNCIA-Junos holders are recognised in service provider, financial services, and large enterprise environments where Juniper MX and QFX platforms are common. This course is the correct starting point for any engineer entering a Juniper-heavy environment or planning to pursue JNCIP-ENT, JNCIP-SP, or JNCIP-SEC.
What You'll Learn
- Describe the Junos OS software architecture including the separation of Routing Engine and Packet Forwarding Engine
- Navigate the Junos CLI in both operational and configuration modes and use common pipe filters
- Explain the Junos candidate configuration and commit model, including commit confirmed and rollback
- Configure and verify physical interfaces, interface properties, and logical units
- Configure static routes and verify the routing table (inet.0)
- Configure OSPFv2 and verify neighbour adjacency, LSDB, and route installation
- Create and apply routing policies using from/then constructs, match conditions, and actions
- Implement stateless firewall filters with term-based match conditions applied to interfaces
- Describe Junos high-availability features: graceful restart, NSR, and dual RE operation
- Perform basic monitoring and troubleshooting using show commands and log files
Who This Course Is For
- Network engineers new to Juniper Networks technology entering a Juniper-based environment
- CCNA-certified professionals adding Juniper credentials to support multi-vendor environments
- Service provider and carrier network operations staff working with Juniper MX or PTX infrastructure
- Security engineers working toward JNCIA-SEC or JNCIP-SEC via the Juniper track
- Network students and recent graduates targeting service provider or financial sector networking roles
- IT professionals pursuing Juniper certifications as a path to JNCIP or JNCIE
Course Outline
- Junos OS software architecture: monolithic kernel, RE/PFE separation
- Key Junos daemons: rpd, mgd, chassisd, pfed
- Junos platforms: MX, EX, QFX, SRX, PTX and shared OS model
- Junos release naming convention and software versioning
- Comparison with traditional network OS architectures
- Operational mode commands: show, ping, traceroute, monitor
- Configuration mode: entering, editing, and navigating the hierarchy
- Candidate configuration and commit model (commit, commit confirmed, rollback)
- Load and save configuration: set format, text format, XML format
- CLI pipe filters: count, except, find, match, no-more
- Active vs. candidate configuration and rescue configuration
- Interface naming conventions (ge-0/0/0, et-0/0/0, ae0, lo0)
- Physical and logical interface properties: MTU, speed, duplex
- Configuring inet (IPv4) and inet6 (IPv6) family on logical units
- Loopback interface and its role in routing protocols
- VLAN tagging on EX switches: access and trunk modes, unit configuration
- Interface monitoring: show interfaces detail, show interfaces terse
- Junos routing table: inet.0, inet6.0, and table structure
- Static route configuration: next-hop, discard, reject
- Default route configuration and preference values
- OSPFv2 configuration: area definition, interface activation, and authentication
- OSPF neighbour adjacency verification and LSDB inspection
- Route preference (administrative distance) in Junos
- show route and show route detail output interpretation
- Routing policy architecture: import and export policies
- Policy terms: from (match conditions) and then (actions)
- Match conditions: protocol, prefix-list, route-filter, community, AS path
- Actions: accept, reject, next term, next policy
- Modifying route attributes: metric, local-preference, community, origin
- Default routing policy behaviour for connected, static, and OSPF routes
- Applying policy to OSPF import/export and static route redistribution
- Junos stateless firewall filter architecture and terminology
- Filter terms: from (match) and then (action: accept, discard, reject, count, log)
- Applying filters to interfaces: input and output direction
- Loopback filter for management plane protection
- Filter counter verification with show firewall
- Difference between stateless firewall filters and stateful SRX security policies (overview)
- System services: SSH, Telnet, NETCONF, FTP configuration
- User accounts, authentication, and login classes
- Syslog configuration: facility, severity, and log files
- SNMP v2c/v3 configuration and MIB overview
- NTP client configuration on Junos
- Full-length timed JN0-105 practice exam
- Weak-area review using show command output interpretation exercises
About the Certification Exam
- Exam code
- JN0-105
- Length
- 90 minutes
- Questions
- 65 (multiple choice, multiple select)
- Passing score
- 60% (approximately 39 correct out of 65)
- Exam cost
- ~$200 USD
- Where
- Pearson VUE (test centre or online proctored)
The certification exam fee is paid separately to the testing provider and is not included in the course price unless stated otherwise.
Live Labs Included
Hands-on practice on real environments
This course includes Live Labs — direct access to real hardware and cloud environments so you build the skills the exam actually tests.
- Navigate the Junos CLI on a real EX-series switch in both operational and configuration mode, stage a multi-stanza configuration change, commit it, verify the result, and perform a rollback to the previous configuration
- Configure OSPFv2 on a three-router Junos topology, verify neighbour adjacency formation, inspect the LSDB, and confirm route installation in inet.0 with show route
- Build a routing policy that redistributes connected and static routes into OSPF with a specific metric, attach it as an OSPF export policy, and verify redistribution on a remote router
- Implement a stateless firewall filter to permit SSH and ICMP to the loopback interface while discarding all other management traffic, apply it inbound on lo0, and verify counter increments
- Configure EX-series switch VLANs in Junos syntax, assign access and trunk ports using logical interface units, and verify Layer 2 forwarding with show ethernet-switching table
- Configure a prefix-list-based routing policy to selectively announce only specific prefixes from a Junos router to an OSPF neighbour and verify the filtered routes appear correctly in the neighbour's routing table
Pass Guarantee Included
Complete this course and if you don't pass the certification exam on your first attempt, we'll refund your course fee or give you a free retake — your choice.