JN0-106 Junos OS Fundamentals Practice Question
What happens when a user issues the 'request system reboot' command without any options?
⚠ Common exam trap
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.
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
✓
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.
Answer analysis
Option-by-option breakdown
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
The 'request system reboot' command is not tied to the commit process. It does not wait for a commit operation to complete or schedule a reboot to follow a commit; rather, it immediately initiates the reboot sequence after the user confirms. The current configuration may be uncommitted or committed, but that state does not gate the reboot action. Thus, saying it reboots after the current commit is incorrect because no commit is performed or awaited by this command.
- ✗
The device reboots immediately.
Why it's wrong here
Without the 'now' option, 'request system reboot' does not reboot instantly. The command first displays a confirmation prompt, asking the user to explicitly verify that a reboot should proceed. Only when the 'now' keyword is appended (e.g., 'request system reboot now') does the device skip the prompt and initiate the reboot immediately. Therefore, immediate reboot is not the default behavior and requires the 'now' modifier.
- ✓
The device prompts for confirmation.
Why this is correct
By default, 'request system reboot' is an interactive command that prompts for confirmation. When executed, it displays a message asking the user to confirm the action, and optionally warns about unsaved configuration changes. The user must respond affirmatively (typically 'yes' or 'y') before the device begins the reboot sequence. This confirmation step is a safety mechanism to prevent accidental reboots and is the default behavior unless the 'now' option is provided.
- ✗
The device schedules a reboot in 5 minutes.
Why it's wrong here
There is no built-in 5-minute delay or scheduled reboot behavior in the basic 'request system reboot' command. The command either prompts for confirmation (default) or executes immediately if the 'now' option is used. To schedule a reboot for a specific time, Junos requires a separate syntax such as 'request system reboot at <time>'. Thus, option D incorrectly assumes a fixed 5-minute delay that does not exist in this command's default behavior.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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