JN0-106: Junos, Associate (JNCIA-Junos) CertificationDemo

By Juniper · Browse Mode
About the Exam

JN0-106 is Juniper's Junos, Associate (JNCIA-Junos) certification exam for networking professionals with beginner-intermediate networking knowledge. It covers networking fundamentals, Junos OS fundamentals, user interfaces, configuration basics, operational monitoring and maintenance, routing fundamentals, and routing policy and firewall filters. Passing demonstrates an understanding of the core functionality of Juniper Networks Junos OS and serves as the baseline certification for the Enterprise Routing and Switching and Service Provider Routing and Switching tracks.

Exam Topics

  • Networking Fundamentals0%
  • Junos OS Fundamentals0%
  • User Interfaces0%
  • Configuration Basics0%
  • Operational Monitoring and Maintenance0%
  • Routing Fundamentals0%
  • Routing Policy and Firewall Filters0%

How to Use This Practice Exam

  1. Browse — Read each question, select your answer, and reveal the explanation.
  2. Exam Mode — Simulate real exam conditions with a timed session and score report.
  3. Learn Mode — Spaced repetition schedules questions you struggle with for long-term retention.

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Last updated August 12, 2026 at 7:45 PM

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QuestionQ1

Routing Fundamentals

Which two statements regarding route preference in Junos OS are correct?

Choose two
  • A Higher route preference values indicate higher priority.
  • B Route preference is considered after evaluating the longest prefix match.
  • C Lower route preference values indicate higher priority.
  • D Route preference determines the forwarding table size.
Explanation

Junos OS treats a lower route-preference value as more preferred. Longest-prefix matching identifies the most-specific matching destination, after which route preference is used to select the preferred route for that destination. Route preference ranks route candidates; it does not determine forwarding-table size.

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QuestionQ2

Networking Fundamentals

Which IPv4 address and subnet-mask combination represents a point-to-point connection with exactly two usable host addresses?

  • A 192.168.1.0/30
  • B 192.168.1.0/29
  • C 192.168.1.0/24
  • D 192.168.1.0/28
Explanation

An IPv4 /30 subnet contains four addresses in total. With one network address and one broadcast address reserved, two addresses remain usable for the endpoints of a point-to-point link.

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QuestionQ3

Junos OS Fundamentals

Which two statements are true about logical units?

Choose two
  • A A physical interface can host multiple logical units.
  • B Logical units can have multiple IP addresses.
  • C Logical units are used only for management interfaces.
  • D A physical interface can host only one logical unit.
Explanation

A physical interface can host multiple logical units, enabling multiple logical interfaces such as VLAN-associated interfaces on one physical device. A logical unit can also have more than one IP address configured. Logical units are not limited to management interfaces.

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QuestionQ4

Junos OS Fundamentals

Which two statements accurately describe the way Junos OS performs control and forwarding functions?

Choose two
  • A The Packet Forwarding Engine (PFE) forwards packets based on forwarding tables received from the Routing Engine.
  • B Exception traffic is always dropped by the Packet Forwarding Engine without being inspected.
  • C Transit traffic is processed by the Routing Engine to ensure high-speed packet forwarding.
  • D The Routing Engine (RE) is responsible for maintaining routing tables and running routing protocols.
Explanation

The Routing Engine maintains routing tables and runs routing protocols. It installs active routes into the forwarding table, and Junos OS synchronizes that forwarding information to the Packet Forwarding Engine, which forwards packets. Transit traffic is therefore handled by the PFE rather than the Routing Engine, and exception traffic is not always dropped.

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QuestionQ5

Operational Monitoring and Maintenance

According to HPE Juniper Networking, which two recommended tasks should you complete before upgrading Junos OS on a device?

Choose two
  • A Delete all rollback configurations.
  • B Verify available storage space using the show system storage command.
  • C Disable all interfaces to prevent traffic during the upgrade.
  • D Back up the active current configuration.
Explanation

Before a Junos OS upgrade, sufficient disk space must be available, which can be verified with the show system storage command. The active configuration should also be backed up to preserve a recoverable configuration if the upgrade must be rolled back or restored.

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