Quick Answer
The answer is configure private, configure exclusive, and configure shared. These three modes control how multiple administrators interact with the Junos candidate configuration, each offering different levels of isolation and concurrency. Configure private creates a completely isolated session where changes are invisible to other users until committed, configure exclusive locks the entire configuration database to a single user, and configure shared allows all users to see and modify the same candidate configuration simultaneously. On the JNCIA-Junos exam, this question tests your understanding of operational versus configuration mode and the specific behavior of each mode, often appearing as a multiple-select item where a common trap is confusing configure private with configure shared or forgetting that configure exclusive is a distinct mode. A useful memory tip is to think of the three modes as “alone” (private), “only me” (exclusive), and “together” (shared).
This JNCIA-JUNOS practice question tests your understanding of user interfaces. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which THREE modes can be used to enter configuration mode in Junos? (Choose three.)
configure static
Why wrong: Not a valid Junos configuration mode.
configure private
Creates a private copy of the candidate configuration.
configure shared
Default mode where multiple users can edit the candidate config (non-exclusive).
configure dynamic
Why wrong: Not a valid Junos configuration mode.
configure exclusive
Locks the configuration database to prevent others from 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
configure private
Option B is correct because 'configure private' creates a private configuration session that isolates candidate changes from other users, allowing multiple users to stage changes simultaneously without interference. This mode is one of the three standard configuration modes in Junos, alongside exclusive and shared.
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.
configure static
Why it's wrong here
Not a valid Junos configuration mode.
configure private
Why this is correct
Creates a private copy of the candidate configuration.
Related concept
Read the scenario before looking for a memorised answer.
configure shared
Why this is correct
Default mode where multiple users can edit the candidate config (non-exclusive).
Related concept
Read the scenario before looking for a memorised answer.
configure dynamic
Why it's wrong here
Not a valid Junos configuration mode.
configure exclusive
Why this is correct
Locks the configuration database to prevent others from editing.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates may confuse Junos configuration modes with Cisco IOS configuration modes (like 'configure terminal' or 'configure memory'), leading them to select non-existent options like 'configure static' or 'configure dynamic'.
Detailed technical explanation
Junos configuration modes control how multiple users interact with the candidate configuration. In 'configure private', each user gets an isolated copy of the configuration, and changes are merged at commit time. In 'configure exclusive', a single user locks the configuration, preventing others from making changes. In 'configure shared', all users share the same candidate configuration, which can lead to conflicts if not coordinated. These modes are entered via the 'configure' command with the appropriate keyword at the CLI.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A practitioner preparing for the JNCIA-JUNOS exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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: configure private — Option B is correct because 'configure private' creates a private configuration session that isolates candidate changes from other users, allowing multiple users to stage changes simultaneously without interference. This mode is one of the three standard configuration modes in Junos, alongside exclusive and shared.
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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