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 technician needs to load a new configuration file that replaces only the specific hierarchy paths present in the file, leaving all other existing configuration unchanged. Which load statement is appropriate?
Why wrong: 'load replace' replaces the entire configuration hierarchy with the file's contents, not just specific paths.
B
load set
Why wrong: 'load set' is used to load a set of configuration commands from a file, but it behaves like merge by default; however, 'load merge' is the explicit command for adding to existing config.
C
load override
Why wrong: 'load override' completely replaces the entire candidate configuration with the contents of the file, discarding all existing configuration.
D
load merge
'load merge' adds or replaces only the configuration statements in the file, preserving all other existing configuration.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
load merge
The 'load merge' command is correct because it merges the contents of the specified configuration file with the current candidate configuration, adding or updating only the hierarchy paths present in the file while preserving all other existing configuration. This matches the requirement to replace only specific hierarchy paths without affecting the rest of the 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.
✗
load replace
Why it's wrong here
'load replace' replaces the entire configuration hierarchy with the file's contents, not just specific paths.
✗
load set
Why it's wrong here
'load set' is used to load a set of configuration commands from a file, but it behaves like merge by default; however, 'load merge' is the explicit command for adding to existing config.
✗
load override
Why it's wrong here
'load override' completely replaces the entire candidate configuration with the contents of the file, discarding all existing configuration.
✓
load merge
Why this is correct
'load merge' adds or replaces only the configuration statements in the file, preserving all other existing configuration.
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 often confuse 'load merge' with 'load replace' or 'load override', mistakenly thinking 'replace' means partial replacement, when in fact 'replace' replaces the entire candidate configuration, while 'merge' is the correct command for targeted, non-destructive updates.
Trap categories for this question
Command / output trap
'load set' is used to load a set of configuration commands from a file, but it behaves like merge by default; however, 'load merge' is the explicit command for adding to existing config.
Detailed technical explanation
How to think about this question
Under the hood, 'load merge' reads the configuration file and applies each statement as an addition or modification to the existing candidate configuration hierarchy, using the same logic as if the statements were entered manually in configuration mode. A subtle behavior is that 'load merge' will not remove any existing configuration that is not referenced in the file, making it ideal for incremental changes. In a real-world scenario, this is commonly used when applying a partial configuration snippet from a template or a backup of a specific feature, such as adding a new BGP group without disturbing existing routing policies.
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 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: load merge — The 'load merge' command is correct because it merges the contents of the specified configuration file with the current candidate configuration, adding or updating only the hierarchy paths present in the file while preserving all other existing configuration. This matches the requirement to replace only specific hierarchy paths without affecting the rest of the 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.