- A
A static route with a next-hop of 127.0.0.1 is an unreachable route.
Why wrong: Incorrect: 127.0.0.1 is a loopback address; using it as a next-hop does not automatically make the route unreachable.
- B
Static routes have a default preference of 5.
Correct: the default preference for static routes is 5.
- C
A static route configured with a next-hop of an interface name (e.g., ge-0/0/0) uses Address Resolution Protocol (ARP) to resolve the next-hop MAC address.
Correct: specifying an interface as the next-hop causes the router to ARP for the destination.
- D
A static route with a next-hop of 0.0.0.0 is a discard route.
Why wrong: Incorrect: next-hop 0.0.0.0 is used for default routes; a discard route is configured with the 'discard' keyword.
- E
Static routes can have a preference value of 0.
Why wrong: Incorrect: preference 0 is reserved for directly connected routes; static routes can have preferences from 1 to 255.
JNCIA-JUNOS Routing Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. 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.
Which two statements about static routes in Junos OS are correct?
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
Static routes have a default preference of 5.
Option A is correct: static routes have a default preference of 5. Option B is correct: when a static route uses an interface as the next-hop, the router uses ARP to resolve the MAC address of the next-hop. Option C is incorrect: a next-hop of 0.0.0.0 is used for a default route, not a discard route; a discard route uses the 'discard' keyword. Option D is incorrect: static routes cannot have a preference of 0; preference 0 is reserved for directly connected routes. Option E is incorrect: 127.0.0.1 is a loopback address, but as a next-hop it would require the loopback interface to be specified and is not typically used for unreachable routes.
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.
- ✗
A static route with a next-hop of 127.0.0.1 is an unreachable route.
Why it's wrong here
Incorrect: 127.0.0.1 is a loopback address; using it as a next-hop does not automatically make the route unreachable.
- ✓
Static routes have a default preference of 5.
Why this is correct
Correct: the default preference for static routes is 5.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
A static route configured with a next-hop of an interface name (e.g., ge-0/0/0) uses Address Resolution Protocol (ARP) to resolve the next-hop MAC address.
Why this is correct
Correct: specifying an interface as the next-hop causes the router to ARP for the destination.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A static route with a next-hop of 0.0.0.0 is a discard route.
Why it's wrong here
Incorrect: next-hop 0.0.0.0 is used for default routes; a discard route is configured with the 'discard' keyword.
- ✗
Static routes can have a preference value of 0.
Why it's wrong here
Incorrect: preference 0 is reserved for directly connected routes; static routes can have preferences from 1 to 255.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Keyword trap
Incorrect: next-hop 0.0.0.0 is used for default routes; a discard route is configured with the 'discard' keyword.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 JNCIA-JUNOS exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Questions learners often ask
What does this JNCIA-JUNOS question test?
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: Static routes have a default preference of 5. — Option A is correct: static routes have a default preference of 5. Option B is correct: when a static route uses an interface as the next-hop, the router uses ARP to resolve the MAC address of the next-hop. Option C is incorrect: a next-hop of 0.0.0.0 is used for a default route, not a discard route; a discard route uses the 'discard' keyword. Option D is incorrect: static routes cannot have a preference of 0; preference 0 is reserved for directly connected routes. Option E is incorrect: 127.0.0.1 is a loopback address, but as a next-hop it would require the loopback interface to be specified and is not typically used for unreachable routes.
What should I do if I get this JNCIA-JUNOS question wrong?
Identify which JNCIA-JUNOS exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
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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