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.
Which TWO statements correctly describe the behavior of the 'commit confirmed' command in Junos?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The confirmation timeout can be modified by specifying a number of minutes.
Option A is correct because the `commit confirmed` command in Junos accepts an optional numeric argument (in minutes) to override the default confirmation timeout. For example, `commit confirmed 10` sets a 10-minute window during which the administrator must issue a `commit` to make the changes permanent; otherwise, the system automatically rolls back to the previous active configuration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 confirmation timeout can be modified by specifying a number of minutes.
Why this is correct
Correct: The timeout can be set from 1 to 65535 minutes.
Related concept
Read the scenario before looking for a memorised answer.
✗
The default confirmation timeout is 5 minutes.
Why it's wrong here
Incorrect: The default timeout is 10 minutes.
✗
It requires a reboot to revert to the previous configuration.
Why it's wrong here
Incorrect: No reboot is required; rollback is immediate.
✓
It activates the configuration and schedules an automatic rollback unless confirmed.
Why this is correct
Correct: 'commit confirmed' applies the configuration and sets a timer for automatic rollback.
Related concept
Read the scenario before looking for a memorised answer.
✗
It stages the configuration in the candidate configuration but does not apply it until confirmed.
Why it's wrong here
Incorrect: The configuration is applied immediately upon commit.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the default timeout with Cisco's 5-minute default for `configure confirm` or mistakenly think the configuration is only staged and not applied until confirmed, whereas Junos immediately activates it and schedules an automatic rollback.
Detailed technical explanation
How to think about this question
Under the hood, `commit confirmed` leverages the Junos configuration database revision system. When issued, the commit operation creates a new revision and starts a timer; if the timer expires without a subsequent `commit` (or `commit check` with confirmation), mgd automatically loads the previous revision and commits it, effectively reverting all changes. This mechanism is useful for remote management scenarios where a misconfiguration could lock out the administrator — the automatic rollback ensures connectivity is restored without manual intervention.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
User Interfaces — This question tests User Interfaces — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The confirmation timeout can be modified by specifying a number of minutes. — Option A is correct because the `commit confirmed` command in Junos accepts an optional numeric argument (in minutes) to override the default confirmation timeout. For example, `commit confirmed 10` sets a 10-minute window during which the administrator must issue a `commit` to make the changes permanent; otherwise, the system automatically rolls back to the previous active configuration.
What should I do if I get this JNCIA-JUNOS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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