- A
set: Modifies a configuration parameter
The 'set' command is used to change configuration values or add new configuration elements.
- B
edit: Navigates to a specific configuration hierarchy level
The 'edit' command allows moving into a sub-hierarchy of the configuration tree for focused changes.
- C
delete: Removes a configuration element
The 'delete' command removes a configuration statement or entire hierarchy.
- D
rename: Changes the identifier of a configuration object
The 'rename' command is used to rename a configuration node, such as an interface or firewall rule.
- E
set: Removes a configuration element
Why wrong: Incorrect — 'set' is for modifying, not removing; 'delete' is the command for removal.
- F
rename: Navigates to a specific configuration hierarchy level
Why wrong: Incorrect — 'rename' changes identifiers; navigating to a hierarchy level is done with 'edit'.
Know Your Junos Config Mode Commands
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.
Match each Junos configuration mode command to its purpose.
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
set: Modifies a configuration parameter
In Junos configuration mode, 'set' modifies parameters, 'edit' changes the hierarchy level, 'delete' removes elements, and 'rename' renames identifiers. Common confusions involve swapping purposes of 'set' and 'delete', or 'rename' and 'edit'.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
set: Modifies a configuration parameter
Why this is correct
The 'set' command is used to change configuration values or add new configuration elements.
Related concept
Authentication checks who the user is.
- ✓
edit: Navigates to a specific configuration hierarchy level
Why this is correct
The 'edit' command allows moving into a sub-hierarchy of the configuration tree for focused changes.
Related concept
Authentication checks who the user is.
- ✓
delete: Removes a configuration element
Why this is correct
The 'delete' command removes a configuration statement or entire hierarchy.
Related concept
Authentication checks who the user is.
- ✓
rename: Changes the identifier of a configuration object
Why this is correct
The 'rename' command is used to rename a configuration node, such as an interface or firewall rule.
Related concept
Authentication checks who the user is.
- ✗
set: Removes a configuration element
Why it's wrong here
Incorrect — 'set' is for modifying, not removing; 'delete' is the command for removal.
- ✗
rename: Navigates to a specific configuration hierarchy level
Why it's wrong here
Incorrect — 'rename' changes identifiers; navigating to a hierarchy level is done with 'edit'.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Trap categories for this question
Command / output trap
Incorrect — 'set' is for modifying, not removing; 'delete' is the command for removal.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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. Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access. 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.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related JNCIA-JUNOS questions on access control and AAA configuration.
- →
Junos Configuration Basics — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this JNCIA-JUNOS question test?
Junos Configuration Basics — This question tests Junos Configuration Basics — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: set: Modifies a configuration parameter — In Junos configuration mode, 'set' modifies parameters, 'edit' changes the hierarchy level, 'delete' removes elements, and 'rename' renames identifiers. Common confusions involve swapping purposes of 'set' and 'delete', or 'rename' and 'edit'.
What should I do if I get this JNCIA-JUNOS question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related JNCIA-JUNOS questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 11, 2026
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