JN0-106 User Interfaces Practice Question
An administrator wants to view the current operational status of interface ge-0/0/1 on a Junos device. Which command displays this information?
⚠ Common exam trap
The trap here is that Cisco engineers often expect 'show interface' (singular) to work, but Junos strictly requires the plural 'interfaces' for operational commands, and candidates may confuse 'show configuration' (which shows config) with 'show interfaces terse' (which shows operational status).
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 terse ge-0/0/1
The 'show interfaces terse ge-0/0/1' command displays a concise, one-line summary of the operational status of the specified interface, including its administrative and link state, protocol status, and configured IP addresses. This is the correct command for viewing the current operational status because 'terse' filters the output to show only the essential operational details without configuration data.
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 interfaces terse ge-0/0/1
Why this is correct
The show interfaces terse ge-0/0/1 command displays each interface as a single line containing the key operational states: administrative status (enabled/disabled), link state (up/down), and active protocol addresses. For the specified interface ge-0/0/1, this reveals immediately whether the interface is physically connected and configured for operation, without the noise of packet counters or detailed error statistics. It is the standard one-shot operational inquiry for a quick health check.
- ✗
show configuration interfaces ge-0/0/1
Why it's wrong here
This command renders the stored interface configuration, such as the logical unit number, family addressing, speed, and description, from the configuration database rather than from the live router's kernel or forwarding planes. It will not report carrier presence, link flaps, or current protocol adjacency state, so it cannot answer the question of whether ge-0/0/1 is actually operational. A configuration can look correct even when the interface is down due to external causes like a disconnected cable or remote fault.
- ✗
monitor interface ge-0/0/1
Why it's wrong here
The monitor interface command enters an interactive, real-time display that refreshes counter values and status details every few seconds, making it suitable for watching trends over time but not for a one-shot current-state check. Because it remains active until the administrator presses Ctrl-C, it does not give the clean, single snapshot that the question requests. Also, without specifying ge-0/0/1 it monitors all interfaces, and even with the interface argument, the output format differs from terse operational status.
- ✗
show interface ge-0/0/1
Why it's wrong here
In Junos, the operational show command uses the plural keyword 'interfaces'; the singular 'show interface' is not a valid CLI syntax and will be rejected by the management daemon with an error or a 'syntax error' message. This singular form is a common trap for administrators coming from other devices, but it is not a synonym for 'show interfaces'. The correct query must use 'show interfaces terse ge-0/0/1' to get concise operational status.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
Go deeper
Related to this question
About these practice questions
This JN0-106 question is part of Courseiva's 326-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
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.