This JNCIA-JUNOS practice question tests your understanding of user interfaces. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
An engineer needs to view the current active configuration of a Junos device without making any changes. Which CLI mode should they use?
Operational mode
Operational mode provides read-only access to configuration and operational commands.
Privileged mode
Why wrong: Junos uses operational and configuration modes; privileged mode is not a Junos term.
Configuration mode
Why wrong: Configuration mode is for editing, not read-only viewing.
Exclusive configuration mode
Why wrong: Exclusive mode is a type of configuration mode that locks others out; still editing.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Operational mode
Operational mode is the default CLI mode in Junos, used for monitoring, troubleshooting, and viewing the current active configuration without making any changes. Commands in this mode are read-only and do not modify the device's configuration. The active configuration is the one currently running on the device, and it can be viewed using commands like 'show configuration' in operational mode.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
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 provides read-only access to configuration and operational commands.
Related concept
Read the scenario before looking for a memorised answer.
Privileged mode
Why it's wrong here
Junos uses operational and configuration modes; privileged mode is not a Junos term.
Configuration mode
Why it's wrong here
Configuration mode is for editing, not read-only viewing.
Exclusive configuration mode
Why it's wrong here
Exclusive mode is a type of configuration mode that locks others out; still editing.
Common exam traps
The trap here is that candidates familiar with Cisco IOS may confuse 'Privileged mode' (which allows viewing and some changes) with Junos operational mode, but Junos strictly separates read-only (operational) and read-write (configuration) modes.
Detailed technical explanation
In Junos, the active configuration is stored in the 'junos.conf' file on the device's flash, and it is loaded into the kernel's forwarding table. Operational mode commands like 'show configuration' display the active configuration by reading this file, while 'show configuration | display set' shows it in set-format. A subtle behavior is that 'show configuration' in operational mode shows the candidate configuration if it has been committed, but if changes are pending, it shows the last committed configuration, not the candidate.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A junior network technician can log in to a core router but cannot reach the enable prompt or configuration mode. The AAA server is authenticating the login — but the authorisation policy only grants privilege level 1, not 15. Authentication (who you are) is working; authorisation (what you can do) is not.
What to study next
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FAQ
User Interfaces — This question tests User Interfaces — Read the scenario before looking for a memorised answer..
The correct answer is: Operational mode — Operational mode is the default CLI mode in Junos, used for monitoring, troubleshooting, and viewing the current active configuration without making any changes. Commands in this mode are read-only and do not modify the device's configuration. The active configuration is the one currently running on the device, and it can be viewed using commands like 'show configuration' in operational mode.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This JNCIA-JUNOS 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 JNCIA-JUNOS exam.
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