JN0-106 Operational Monitoring and Maintenance Practice Question
A junior administrator wants to view only the operational state of interface ge-0/0/1, including its link status and protocol state. Which command should they use?
⚠ Common exam trap
The trap here is that candidates familiar with Cisco IOS might type 'show interface' (singular) instead of the Junos plural 'show interfaces', or they might choose 'extensive' thinking more detail is better, when 'terse' is the precise tool for a quick operational state check.
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
✓
show interfaces ge-0/0/1 terse
The 'show interfaces ge-0/0/1 terse' command displays a concise operational state of the interface, including link status (up/down) and protocol state (up/down) without configuration details. This is the standard Junos command for quickly verifying the operational status of a specific interface.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
show interface ge-0/0/1
Why it's wrong here
The command 'show interface ge-0/0/1' fails because the Junos CLI keyword is the plural 'interfaces', not the singular 'interface'. In Junos, the operational command is always 'show interfaces' as the base; using 'interface' results in an 'error: syntax error' or 'unknown command'. This misspelling means no output is produced at all, so it cannot display the operational state.
- ✓
show interfaces ge-0/0/1 terse
Why this is correct
The command 'show interfaces ge-0/0/1 terse' is correct because 'terse' is a display level that shows one summary line per interface or logical unit, including admin status, link status, protocol status, and the configured IP addresses. This is exactly what the junior administrator needs to quickly view operational status without cluttering the output with counters or configuration details. The 'terse' keyword is the standard Junos way to get a concise operational snapshot.
- ✗
show configuration interfaces ge-0/0/1
Why it's wrong here
The command 'show configuration interfaces ge-0/0/1' displays the configured settings for the interface, such as logical units, family addresses, and MTU, but it does not show any live operational state like link status or protocol state. An operational status check must come from the 'show interfaces' family, not the configuration hierarchy. Therefore, this command is wrong for viewing operational state, as it only reveals the intended configuration, not the actual current status.
- ✗
show interfaces ge-0/0/1 extensive
Why it's wrong here
The command 'show interfaces ge-0/0/1 extensive' provides a very detailed output with interface flags, queue statistics, error counters, and configuration history, which is far more than 'only operational status'. The 'extensive' display level is used for deep troubleshooting, not for a quick status check, and it can generate dozens of lines of output. Since the junior administrator wants just the operational status, 'extensive' is too verbose and misses the concise 'terse' view.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This JN0-106 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 JN0-106 exam.