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.
What permission bit must be included in a custom login class to allow a user to execute the ping command?
view
Why wrong: view grants read-only access but not ping.
control
Why wrong: control allows configuration changes, not ping.
system
Why wrong: system permission allows system administration, not ping specifically.
network
network permission allows diagnostic tools like ping and traceroute.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
network
The correct answer is D, network. In Junos, the 'network' permission bit controls access to network diagnostic commands such as ping, traceroute, and ssh. Without this permission, a user cannot execute these commands even if they have other permissions like view or control.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
view
Why it's wrong here
view grants read-only access but not ping.
control
Why it's wrong here
control allows configuration changes, not ping.
system
Why it's wrong here
system permission allows system administration, not ping specifically.
network
Why this is correct
network permission allows diagnostic tools like ping and traceroute.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often assume 'view' or 'control' permissions are sufficient for basic troubleshooting commands, but Junos requires the specific 'network' permission bit for any command that sends or receives network traffic.
Detailed technical explanation
Junos login classes use permission bits to granularly control user access to operational commands. The 'network' permission bit specifically enables commands that interact with network interfaces and protocols, including ICMP echo requests (ping) and UDP/TCP probes (traceroute). This is distinct from the 'view' permission, which only allows reading the configuration and operational state without executing any commands that generate traffic or modify state.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
User Interfaces — This question tests User Interfaces — Read the scenario before looking for a memorised answer..
The correct answer is: network — The correct answer is D, network. In Junos, the 'network' permission bit controls access to network diagnostic commands such as ping, traceroute, and ssh. Without this permission, a user cannot execute these commands even if they have other permissions like view or control.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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