JN0-106 Junos OS Fundamentals Practice Question
Which Junos CLI mode allows a user to view the configuration and execute operational commands, but not make configuration changes?
⚠ Common exam trap
The trap here is that candidates familiar with Cisco IOS may confuse 'Enable mode' (which grants configuration privileges in Cisco) with Junos's Operational mode, not realizing that Junos uses a completely different two-tier model where Operational mode is read-only and Configuration mode is required for any changes.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Operational mode
In Junos OS, Operational mode (indicated by the `>` prompt) allows users to execute operational commands (e.g., `show`, `ping`, `traceroute`) and view the active configuration using `show configuration`, but it does not permit any changes to the configuration. Configuration changes require entering Configuration mode (indicated by the `#` prompt) via the `configure` command. This separation enforces a strict two-tier access model, ensuring that operational tasks do not inadvertently alter the device's configuration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Operational mode
Why this is correct
Operational mode, indicated by the `>` prompt, is the default Junos CLI mode. It allows users to run `show` commands, including `show configuration` and its variants, to view the active configuration without making any changes. This mode is sufficient for viewing; entering configuration mode is unnecessary for read-only access.
- ✗
Monitor mode
Why it's wrong here
Junos does not implement a 'monitor mode' as a distinct CLI mode. The CLI has only operational mode and configuration mode; commands like `monitor traffic` or `monitor interface` are operational-mode commands, not a separate mode. Therefore, selecting monitor mode is incorrect because it does not exist in the Junos architecture.
- ✗
Enable mode
Why it's wrong here
Enable mode is a concept from Cisco IOS, where users escalate privileges with the `enable` command to access privileged-exec commands. Junos uses login classes and user privileges instead of a separate enable mode. There is no `>` to `#` privilege escalation for viewing configuration; operational mode is always the context for the `show configuration` command.
- ✗
Configuration mode
Why it's wrong here
Configuration mode, entered with `configure` and shown by the `#` prompt, is intended for modifying the candidate configuration. Although you can view the configuration while in this mode (e.g., using `show` within a hierarchy), it is not the primary or required mode for viewing. The question asks for the mode that 'allows a user to view the configuration' — operational mode is the straightforward answer, because configuration mode is for editing and has a different purpose.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This JN0-106 practice question is part of Courseiva's free Juniper Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the JN0-106 exam.