Quick Answer
The answer is that the device prompts for confirmation. This behavior exists because the Junos OS prioritizes operational safety; without any options like 'now' or a specific time, the 'request system reboot' command enters a confirmation dialogue rather than executing immediately. On the JNCIA-Junos exam, this tests your understanding of Junos's default interactive safeguards, often appearing as a trick where candidates assume the system reboots instantly. A common trap is confusing this with the 'request system reboot now' variant, which bypasses the prompt. To remember, think of the mnemonic "No options, no rush" — without additional flags, Junos always asks for a second confirmation before restarting the control plane.
This JNCIA-JUNOS practice question tests your understanding of junos os fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
What happens when a user issues the 'request system reboot' command without any options?
The device reboots after the current commit.
Why wrong: C is wrong; commit not required.
The device reboots immediately.
Why wrong: A is wrong; confirmation is required.
The device prompts for confirmation.
B is correct; user must confirm reboot.
The device schedules a reboot in 5 minutes.
Why wrong: D is wrong; no default delay.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The device prompts for confirmation.
When a user issues the 'request system reboot' command without any options, Junos OS prompts for confirmation before proceeding. This is a safety mechanism to prevent accidental reboots, as the command does not automatically reboot the device immediately or schedule a delayed reboot by default.
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.
The device reboots after the current commit.
Why it's wrong here
C is wrong; commit not required.
The device reboots immediately.
Why it's wrong here
A is wrong; confirmation is required.
The device prompts for confirmation.
Why this is correct
B is correct; user must confirm reboot.
Related concept
Read the scenario before looking for a memorised answer.
The device schedules a reboot in 5 minutes.
Why it's wrong here
D is wrong; no default delay.
Common exam traps
The trap here is that candidates often assume 'request system reboot' behaves like a typical Linux 'reboot' command (immediate execution), but Junos requires explicit confirmation or the 'now' option to proceed without a prompt.
Detailed technical explanation
The 'request system reboot' command triggers a clean shutdown of all processes and file systems before restarting the Junos OS kernel. If the user wants to bypass the confirmation prompt, they can use the 'now' option (e.g., 'request system reboot now') for immediate reboot without interaction. In production environments, this prompt is critical to avoid accidental outages, especially during maintenance windows where a delayed reboot might be intended.
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
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FAQ
Junos OS Fundamentals — This question tests Junos OS Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: The device prompts for confirmation. — When a user issues the 'request system reboot' command without any options, Junos OS prompts for confirmation before proceeding. This is a safety mechanism to prevent accidental reboots, as the command does not automatically reboot the device immediately or schedule a delayed reboot by default.
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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