This JNCIA-JUNOS practice question tests your understanding of user interfaces. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
show interfaces terse ge-0/0/0 Interface Admin Link Proto Local Remote ge-0/0/0 up up inet 192.168.1.1/24
Refer to the exhibit. Based on the output, what is the operational status of interface ge-0/0/0?
show interfaces terse ge-0/0/0 Interface Admin Link Proto Local Remote ge-0/0/0 up up inet 192.168.1.1/24
The interface is up but the link is down.
Why wrong: Link is up.
The interface has no IP address configured.
Why wrong: IP address is present: 192.168.1.1/24.
The interface is administratively down.
Why wrong: Admin is 'up'.
The interface is administratively up and the link is up.
Both Admin and Link are up.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The interface is administratively up and the link is up.
Option D is correct because the output shows 'Physical link is Up' and 'Administratively Up', confirming that the interface is both enabled and receiving a carrier signal. In JUNOS, the 'show interfaces terse' command displays 'up' for the administrative status and 'up' for the link status when both conditions are met.
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.
The interface is up but the link is down.
Why it's wrong here
Link is up.
The interface has no IP address configured.
Why it's wrong here
IP address is present: 192.168.1.1/24.
The interface is administratively down.
Why it's wrong here
Admin is 'up'.
The interface is administratively up and the link is up.
Why this is correct
Both Admin and Link are up.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse the 'up/down' notation in 'show interfaces terse' with Cisco's 'show ip interface brief', where the first 'up' refers to the line protocol and the second to the administrative status, whereas JUNOS reverses the order (administrative first, then link).
Detailed technical explanation
In JUNOS, the 'show interfaces terse' command provides a concise view of interface status, where the first field (e.g., 'ge-0/0/0.0') shows the administrative status (up/down) and the second field shows the link status (up/down). The 'Physical link is Up' message in the full output confirms that Layer 1 carrier detection (e.g., from the transceiver or cable) is active, while 'Administratively Up' confirms the interface has not been placed in a 'disable' state. This distinction is critical for troubleshooting, as an interface can be administratively up but have a down link due to a faulty cable or remote end.
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
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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: The interface is administratively up and the link is up. — Option D is correct because the output shows 'Physical link is Up' and 'Administratively Up', confirming that the interface is both enabled and receiving a carrier signal. In JUNOS, the 'show interfaces terse' command displays 'up' for the administrative status and 'up' for the link status when both conditions are met.
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 11, 2026
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