JN0-106 Junos, Associate (JNCIA-Junos) exam
Proctored multiple-choice knowledge exam mapped to the published Juniper objectives and the current software scope named on the official page.
- Type
- Written
- Delivery
- Both
- Duration
- 90 min
- Questions
- 65
Exam sections
Networking Fundamentals
This section frames Identify the concepts and functionality of various fundamental elements of networking Collision domains and broadcast domains Function of routers and switches Ethernet networks Layer 2 addressing, including address resolution Layer 3 / IP addressing, including subnet masks IPv4 / IPv6 Subnetting and supernetting Decimal to binary conversion Longest match routing CoS Connection-oriented vs. connectionless protocols as part of junos design, implementation, operations, and troubleshooting. Candidates should be able to explain the normal path, choose an appropriate action, and identify what information would confirm or challenge their conclusion. This framing keeps the section aligned with the role expectations behind JNCIA-Junos.
Question notes
Questions can move between planning and operations, requiring candidates to recognize prerequisites, select a method, and anticipate how the completed change should be validated. When context is ambiguous, prefer the interpretation that fits Junos OS and Juniper networking platforms guidance and the stated scenario outcome.
Preparation tips
Study Networking Fundamentals through comparison. Contrast the main options, record their prerequisites and trade-offs, and practice selecting between them from short requirements instead of memorizing feature lists. Record one concrete example you could discuss in an interview for JNCIA-Junos.
Junos OS Fundamentals
Junos OS Fundamentals focuses on Identify the concepts, benefits, or functionality of the core elements of the Junos OS, including: Software architecture Control and forwarding planes Routing engine and packet-forwarding engine Transit traffic processing Exception traffic. The useful preparation boundary is not only what each item means, but how it changes planning, implementation, analysis, or support decisions in junos design, implementation, operations, and troubleshooting. For JNCIA-Junos, the practical connection to User Interfaces is especially worth tracing.
Question notes
The wording may test depth through verbs such as identify, explain, configure, analyze, or troubleshoot. Match preparation depth to those verbs throughout the published Junos OS Fundamentals outline. Keep the candidate profile for JNCIA-Junos in mind when choosing between a theoretical and an operationally useful response.
Preparation tips
Pair official reading with retrieval practice: close the material, reconstruct the Junos OS Fundamentals workflow, and check the result against the blueprint. Record gaps by subtopic instead of repeatedly rereading the entire section. Repeat the exercise with a changed requirement to test whether the reasoning transfers beyond one memorized case.
User Interfaces
User Interfaces assesses working knowledge of Identify the concepts, operation, or functionality of the Junos user interface, including: 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 only). A strong response accounts for the stated goal, the surrounding environment, and the operational effect of the selected Junos OS and Juniper networking platforms approach. The domain is most useful when studied as part of the complete JNCIA-Junos workflow.
Question notes
Where several answers seem reasonable, use provider-recommended behavior, explicit requirements, and the least disruptive complete solution to distinguish the strongest response. A correct response should address the whole requirement without introducing conflict elsewhere in the JNCIA-Junos scope.
Preparation tips
Explain User Interfaces aloud as if handing an environment to a colleague. Include purpose, prerequisites, normal workflow, expected evidence, common misconfiguration, and a safe first troubleshooting step. Then connect the exercise to Configuration Basics so preparation covers the handoff between domains.
Configuration Basics
Configuration Basics focuses on Identify the main elements for configuring Junos devices, including: Factory-default state Initial configuration User accounts Login classes User authentication methods Interface types and properties Configuration groups Additional initial configuration elements, such as Network Time Protocol (NTP), SNMP, system log Configuration archival Logging and tracing Rescue configuration Describe how to configure basic components of a Junos device. The useful preparation boundary is not only what each item means, but how it changes planning, implementation, analysis, or support decisions in junos design, implementation, operations, and troubleshooting. Candidates should relate this material to Operational Monitoring and Maintenance wherever the workflow crosses domain boundaries.
Question notes
The wording may test depth through verbs such as identify, explain, configure, analyze, or troubleshoot. Match preparation depth to those verbs throughout the published Configuration Basics outline. This distinction matters specifically to Junos, Associate (JNCIA-Junos) exam and its role-focused assessment boundary.
Preparation tips
Pair official reading with retrieval practice: close the material, reconstruct the Configuration Basics workflow, and check the result against the blueprint. Record gaps by subtopic instead of repeatedly rereading the entire section. Compare your explanation with the provider's terminology before treating the topic as complete.
Operational Monitoring and Maintenance
Operational Monitoring and Maintenance examines Identify methods of monitoring or maintaining Junos devices, including: Show commands Monitor commands Interface statistics and errors Network tools, such as ping, traceroute, telnet, SSH, etc. Junos OS installation and upgrades Powering on and shutting down Junos devices Root password recovery Describe monitoring or maintenance procedures for a Junos device. Candidates should be able to connect these elements to junos design, implementation, operations, and troubleshooting and recognize how decisions in this area affect the surrounding Junos OS and Juniper networking platforms solution. Its place in JNCIA-Junos becomes clearer when candidates follow inputs and outcomes into Routing Fundamentals.
Question notes
Coverage can test both what Operational Monitoring and Maintenance does and when it is the appropriate choice. Be prepared to reject solutions that are technically possible but misaligned with the stated goal. The strongest answer should remain consistent with the wider goal of junos design, implementation, operations, and troubleshooting.
Preparation tips
Write several misleading answer choices for an assessment scenario in Operational Monitoring and Maintenance and explain precisely why each is wrong. This exposes weak distinctions and makes official terminology easier to apply under exam pressure. Retest the same skill from an operator, designer, or customer perspective that matches JNCIA-Junos.
Routing Fundamentals
The official outline places Identify basic routing concepts or functionality for Junos devices, including: Traffic forwarding concepts Routing tables Routing vs. forwarding tables Route preference Routing instances Static routing Advantages of and use cases for dynamic routing protocols Describe how to configure or monitor basic routing elements for a Junos device within Routing Fundamentals. Candidates need to understand how the pieces relate, when each one is relevant, and what a sound result looks like in the context of Junos OS and Juniper networking platforms. This is one of the specific capability boundaries that gives JNCIA-Junos its role relevance.
Question notes
The assessment may connect configuration intent with resulting behavior. Candidates should understand how changes in Routing Fundamentals become visible through status, telemetry, policy evaluation, or user experience. Cross-check the proposed answer against dependencies that connect Routing Fundamentals with Routing Policy and Firewall Filters.
Preparation tips
Build a small scenario around Routing Fundamentals, perform or diagram the relevant workflow, then explain why each choice is appropriate and what evidence would reveal a mistake. Use the official subtopics as a checklist after the exercise. Record one concrete example you could discuss in an interview for JNCIA-Junos.
Routing Policy and Firewall Filters
This domain covers Identify the concepts or 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 structure and terms Filter match criteria and actions Effect of filters on packets Unicast reverse-path-forwarding (RPF) Describe how to configure or monitor routing policies and firewall filters on a Junos device. A prepared candidate can move beyond definitions and reason about dependencies, recommended patterns, operational risks, and likely outcomes connected to Routing Policy and Firewall Filters. This is one of the specific capability boundaries that gives JNCIA-Junos its role relevance.
Question notes
Questions can move between planning and operations, requiring candidates to recognize prerequisites, select a method, and anticipate how the completed change should be validated. When context is ambiguous, prefer the interpretation that fits Junos OS and Juniper networking platforms guidance and the stated scenario outcome. Apply that interpretation to the Routing Policy and Firewall Filters coverage defined for Junos, Associate (JNCIA-Junos) exam.
Preparation tips
Use the official outline to design several decision scenarios for Routing Policy and Firewall Filters. For each one, state the requirement, reject at least one tempting alternative, and justify the final approach in product-specific terms. Record one concrete example you could discuss in an interview for JNCIA-Junos.