The correct approach is to use the 'deactivate' command to mark the statements inactive. This command temporarily disables a set of configuration statements without deleting them, prefixing them with 'inactive:' in the configuration hierarchy so the commit operation ignores them. This is the ideal method for testing changes because the statements remain intact and can be quickly re-enabled using the 'activate' command, avoiding the risk of losing configuration details. On the JNCIA-Junos exam, this concept tests your understanding of configuration management and operational efficiency, often appearing in scenario-based questions where a candidate must distinguish between deactivate, delete, and comment out. A common trap is confusing 'deactivate' with 'delete'—remember that deactivate preserves the statements for easy rollback. Memory tip: think of "deactivate" as putting a configuration statement in a temporary "sleep mode" rather than erasing it.
JNCIA-JUNOS Junos Configuration Basics Practice Question
This JNCIA-JUNOS practice question tests your understanding of junos configuration basics. 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.
A network administrator needs to temporarily disable a set of configuration statements for testing without deleting them. Which approach should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
use the 'deactivate' command to mark the statements inactive
Option A is correct because the 'deactivate' command in Junos allows an administrator to temporarily disable a set of configuration statements without removing them from the configuration. When a statement is deactivated, it is prefixed with 'inactive:' in the configuration hierarchy, and the commit operation ignores it. This is ideal for testing changes, as the statements can be easily re-enabled using the 'activate' command.
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.
✓
use the 'deactivate' command to mark the statements inactive
Why this is correct
'deactivate' makes the configuration inactive without removing it, allowing easy reactivation.
Related concept
Read the scenario before looking for a memorised answer.
✗
delete the statements and later re-add from a backup
Why it's wrong here
This is inefficient and error-prone; deactivate is the proper method.
✗
comment out the lines using #
Why it's wrong here
Junos CLI does not support comments in configuration in that manner.
✗
set the configuration to a different group and remove apply-groups
Why it's wrong here
This is overly complex and not the standard way to temporarily disable config.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates familiar with Cisco IOS may assume that commenting out lines with '!' or '#' is a valid method, but Junos uses a structured hierarchy and requires the 'deactivate' command for temporary disabling.
Detailed technical explanation
How to think about this question
The 'deactivate' command works by adding an 'inactive' tag to the configuration node in the candidate configuration. When a commit is performed, the Junos commit engine skips all nodes marked as inactive, effectively removing their operational effect. This is particularly useful in scenarios like testing a new BGP policy or firewall filter, where you can deactivate the policy, commit, verify behavior, and then activate it again without losing the original configuration.
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.
Junos Configuration Basics — This question tests Junos Configuration Basics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: use the 'deactivate' command to mark the statements inactive — Option A is correct because the 'deactivate' command in Junos allows an administrator to temporarily disable a set of configuration statements without removing them from the configuration. When a statement is deactivated, it is prefixed with 'inactive:' in the configuration hierarchy, and the commit operation ignores it. This is ideal for testing changes, as the statements can be easily re-enabled using the 'activate' command.
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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