JNCIA-JUNOS Junos OS Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of junos os fundamentals. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 commands can be used to save the current Junos configuration to a file on the local flash drive? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show configuration | save /config/backup.conf
Option D is correct because the 'show configuration | save' command pipes the current active configuration (from the candidate or active configuration) directly to a file, allowing you to save it to a specified path like /config/backup.conf on the local flash drive. This is a standard method for exporting the running configuration to a file in Junos.
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.
This copies an existing file, not a save from current config.
✗
request system configuration rescue save
Why it's wrong here
This saves the rescue configuration, which is a separate concept.
✗
copy flash:juniper.conf.gz /config/backup.conf
Why it's wrong here
This is a file copy command, not a configuration save command.
✓
show configuration | save /config/backup.conf
Why this is correct
This operational mode command saves the active configuration to the specified file.
Related concept
Read the scenario before looking for a memorised answer.
✓
save /config/backup.conf
Why this is correct
This configuration mode command saves the candidate configuration to a file.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates familiar with Cisco IOS may mistakenly choose option C ('copy flash:...') because it resembles the Cisco command for copying files, but Junos uses different syntax and filesystem references, and options D and E are the correct Junos-specific commands for saving the current configuration to a file.
Trap categories for this question
Command / output trap
This is a file copy command, not a configuration save command.
Detailed technical explanation
How to think about this question
In Junos, the 'show configuration' command outputs the current active configuration in text format, and piping it to 'save' writes that output directly to a file, which is useful for creating manual backups or snapshots. The 'save' command (option E) is a top-level operational mode command that saves the current candidate configuration to a file, effectively performing the same action as 'show configuration | save' but without the pipe. Both methods write to the /config directory on the flash drive, which is the default location for configuration files in Junos.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 OS Fundamentals — This question tests Junos OS Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show configuration | save /config/backup.conf — Option D is correct because the 'show configuration | save' command pipes the current active configuration (from the candidate or active configuration) directly to a file, allowing you to save it to a specified path like /config/backup.conf on the local flash drive. This is a standard method for exporting the running configuration to a file in Junos.
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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