JNCIA-Junos Exam Prep

What you will be able to do

• You will be able to explain the OSI and TCP/IP models and apply IPv4 addressing and subnetting to exam scenarios.
• You will be able to describe the Junos software architecture and the split between the Routing Engine (control plane) and the Packet Forwarding Engine (forwarding plane).
• You will be able to distinguish transit traffic from exception traffic and predict how Junos handles each.
• You will be able to navigate the Junos CLI, moving between operational and configuration modes and using help and pipe modifiers efficiently.
• You will be able to apply the candidate/commit configuration model, including commit confirmed, rollback, and rescue configurations.
• You will be able to tell the routing table (RIB) apart from the forwarding table (FIB) and predict route selection using route preference and longest match.
• You will be able to configure static and default routes and identify where dynamic routing protocols are configured.
• You will be able to answer JN0-105-style multiple-choice questions confidently across all five exam domains.

What is inside

5 modules, 5 lessons. Each module ends in a graded quiz.

1. 01

   Networking fundamentals

   The vendor-neutral networking knowledge the rest of Junos builds on: the OSI and TCP/IP models, Ethernet switching, IPv4 addressing and subnetting, and the transport protocols TCP and UDP.

   1 lessons · 5 quiz questions

2. 02

   Junos OS fundamentals

   What makes Junos distinctive: a single modular operating system across Juniper platforms, the clean separation of the control plane (Routing Engine) from the forwarding plane (Packet Forwarding Engine), and how transit and exception traffic are handled.

   1 lessons · 5 quiz questions

3. 03

   User interfaces

   How you interact with Junos: the CLI with its operational and configuration modes, its help and efficiency features such as completion and pipe modifiers, the J-Web graphical interface, and the login classes that scope what each user can do.

   1 lessons · 5 quiz questions

4. 04

   Configuration basics

   The Junos candidate/active configuration model and its safety net: how commit, commit confirmed, and commit check work, how rollback and rescue configurations recover from mistakes, and how to navigate, display, and load configurations.

   1 lessons · 5 quiz questions

5. 05

   Routing fundamentals

   How Junos builds and uses routing and forwarding tables, how it chooses among routes using route preference and longest match, and how static routes, the default route, and dynamic routing protocols are configured.

   1 lessons · 5 quiz questions