The answer is the command show route 0.0.0.0/0. This is correct because it displays the exact routing table entry for the default static route, allowing you to verify that the next-hop has been updated from 192.168.1.1 to 192.168.1.2. In Junos, the show route command with a specific prefix filters the routing table to only that destination, confirming the active next-hop address without extraneous output. On the JNCIA-Junos exam, this tests your understanding of how to verify static route next-hop change efficiently, as the default route 0.0.0.0/0 is a common candidate for such updates. A common trap is using show route protocol static, which lists all static routes but may not immediately highlight the changed next-hop for the default route. A useful memory tip: think of the default route as the “zero-zero” path—when you change its gateway, always verify with show route 0.0.0.0/0 to see the exact hop.
JNCIA-JUNOS Routing Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. 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.
Exhibit
Refer to the exhibit.
user@router> show route protocol static
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0.0.0.0/0 *[Static/5] 1w2d 00:12:32, metric2 0
> to 192.168.1.1 via ge-0/0/0.0
10.0.0.0/24 *[Static/5] 1w2d 00:10:15, metric2 0
> to 10.0.0.1 via ge-0/0/1.0
user@router> show route 10.0.0.0
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.0.0/24 *[Static/5] 1w2d 00:10:15, metric2 0
> to 10.0.0.1 via ge-0/0/1.0
user@router> show route 0.0.0.0
inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0.0.0.0/0 *[Static/5] 1w2d 00:12:32, metric2 0
> to 192.168.1.1 via ge-0/0/0.0
Refer to the exhibit. The router has a default static route and a static route to 10.0.0.0/24. An engineer updates the next-hop for the default route from 192.168.1.1 to 192.168.1.2. Which command should the engineer use to verify that the change is active?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
show route 0.0.0.0/0
Option C is correct because the command 'show route 0.0.0.0/0' displays the routing table entry for the default route, including its next-hop address. After changing the next-hop from 192.168.1.1 to 192.168.1.2, this command confirms the active route has the updated next-hop. It directly verifies the specific prefix that was modified.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 route 192.168.1.2
Why it's wrong here
This would show a route to that IP, not the default route.
✗
ping 192.168.1.2
Why it's wrong here
Ping tests connectivity, not the routing table entry.
✓
show route 0.0.0.0/0
Why this is correct
This shows the active default route and its next-hop.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
show route protocol static
Why it's wrong here
This shows all static routes, which is less direct.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose 'show route protocol static' thinking it shows all static routes, but they fail to realize it does not isolate the specific prefix changed, and the engineer needs to confirm the next-hop for 0.0.0.0/0, not just any static route.
Trap categories for this question
Command / output trap
This would show a route to that IP, not the default route.
Detailed technical explanation
How to think about this question
In Junos, the 'show route 0.0.0.0/0' command displays the active route for the default prefix, including its next-hop, preference, and age. The routing table uses longest-prefix matching, so the default route (0.0.0.0/0) is only used when no more specific match exists. A real-world scenario is when an ISP changes its gateway; verifying the exact default route entry ensures traffic is forwarded correctly without relying on connectivity tests that may succeed via other paths.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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. 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
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Routing Fundamentals — This question tests Routing Fundamentals — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: show route 0.0.0.0/0 — Option C is correct because the command 'show route 0.0.0.0/0' displays the routing table entry for the default route, including its next-hop address. After changing the next-hop from 192.168.1.1 to 192.168.1.2, this command confirms the active route has the updated next-hop. It directly verifies the specific prefix that was modified.
What should I do if I get this JNCIA-JUNOS question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.