FREE Juniper JNCIA-Junos (JN0-106) Exam Guide 2026: Pass First Try, Objectives, Cost, vs CCNA
Video
In an Ethernet network built with a hub, how many collision domains exist across the connected ports?
Jncia Junos Networking Fundamentals
Question · Easy
Switches with no Spanning Tree
Short
Free 2026 Juniper JNCIA-Junos (JN0-106, the current exam that replaced JN0-105 on April 5, 2026) guide with 7 official objectives, $200 fee, 65-question / 90-minute format, 3-year validity, JNCIA-Junos vs Cisco CCNA/CCST, 4-6 week plan, Junos career outcomes.
Blog
Collision domain vs. broadcast domain
Networking Fundamentals
Flashcard
Which device boundary typically separates broadcast domains in an Ethernet network?
Ethernet mechanism that dynamically binds a logical IP to the correct hardware MAC before unicast packets are sent.
Guess the Term
Introduction & JNCIA-Junos Exam Overview
1.1 JNCIA-Junos Exam Facts
Study guide
Cheat sheet
Which protocol is connection-oriented and uses acknowledgments to provide reliable delivery?
Read the clue and guess the term in 6 tries.
Game
TCP vs. UDP
Which prefix identifies IPv6 link-local addresses?
Word that follows 'subnet' to name the destination prefix optionally appended to an IPv4 address, as in 192.168.1.1/16.
Which IPv4 address is part of a private address range and is valid for host use?
Question · Medium
Longest prefix: roots reggae from a postman
Longest-prefix match
How many usable host addresses are available in an IPv4 /27 subnet?
Junos component that performs Layer 2 and Layer 3 switching and route lookups, keeps its own copy of the table of active routes, and moves traffic between incoming and outgoing interfaces.
Junos OS Fundamentals
1.2 Juniper Certification Track
A host address is 198.51.100.70/26. Which subnet contains this host?
Swap tiles to line up three of the same term.
Term Match
IPv6 address length and notation
Which single summary route covers both 192.0.2.0/24 and 192.0.3.0/24?
FreeBSD UNIX core of Junos software that the routing processes and the command shell run on top of.
A router has these routes: 203.0.113.0/24 via ge-0/0/0, 203.0.113.128/25 via ge-0/0/1, 203.0.113.128/26 via ge-0/0/2, and 0.0.0.0/0 via ge-0/0/3. Which route is used for destination 203.0.113.190?
Question · Hard
Junos control plane vs. forwarding plane
When an Ethernet switch receives a frame with an unknown unicast destination MAC address, what does it do by default?
Software for accessing a Junos device to configure it, monitor its operations, and adjust settings, over a console or a network connection; it has an operational mode and a configuration mode.
User Interfaces
1.3 Exam Blueprint & Study Strategy
How does an Ethernet switch normally learn a MAC address for its forwarding table?
Flip two cards at a time to find matching terms.
Term Pairs
Routing Engine (RE) role
What is the effect of placing switch ports into different VLANs?
Configuration-mode action that applies your pending changes to the database so they take operational effect; until it runs, the device does not implement them.
What is the primary purpose of Spanning Tree Protocol in an Ethernet switching environment?
Transit traffic vs. exception traffic
In a Class of Service design, what is the role of a classifier?
Configuration command that brings a configuration in from an ASCII file or from terminal input, ignoring where you currently are in the hierarchy.
Networking & Junos OS Fundamentals
2.1 Networking Fundamentals
Which CoS component decides the service order and bandwidth treatment of packets leaving an egress interface?
Find five hidden terms in a grid of letters.
Term Search
Junos software architecture benefit
Which IPv6 address is a global unicast address?
Configuration command that creates a statement hierarchy and assigns identifier values while leaving you at your current hierarchy level.
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