- A
The route preference is set to 170.
Why wrong: A higher preference number makes the route less preferred, but the route would still be active if no better route exists.
- B
The route is not exported into the forwarding table.
Why wrong: Static routes are automatically placed in the forwarding table if active.
- C
The next-hop 192.168.1.1 is not reachable.
If the next-hop is not in the routing table, the static route is not active.
- D
The router already has a default route learned via DHCP.
Why wrong: DHCP default route preference is 12; static route preference is 5, so static would be active and preferred.
Question 91 of 514
JNCIA-JUNOS Routing Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
A network administrator configures the following: `set routing-options static route 0.0.0.0/0 next-hop 192.168.1.1`. After committing, the administrator notices that the default route is not active. What could be the reason?
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
✓
The next-hop 192.168.1.1 is not reachable.
A static route becomes active only if the next-hop address is reachable via a directly connected interface or another active route. If 192.168.1.1 is not reachable (e.g., no ARP entry, interface down, or no matching subnet), the route remains hidden (inactive) in the routing table. Junos verifies next-hop reachability before installing a static route into the forwarding table.
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.
- ✗
The route preference is set to 170.
Why it's wrong here
A higher preference number makes the route less preferred, but the route would still be active if no better route exists.
- ✗
The route is not exported into the forwarding table.
Why it's wrong here
Static routes are automatically placed in the forwarding table if active.
- ✓
The next-hop 192.168.1.1 is not reachable.
Why this is correct
If the next-hop is not in the routing table, the static route is not active.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The router already has a default route learned via DHCP.
Why it's wrong here
DHCP default route preference is 12; static route preference is 5, so static would be active and preferred.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume a static route is always active once configured, overlooking Junos's requirement that the next-hop must be reachable for the route to be installed.
Detailed technical explanation
How to think about this question
Junos uses a next-hop resolution mechanism: a static route's next-hop must be resolved through an active direct or indirect route in the inet.0 table. If the next-hop address is not reachable (e.g., no matching subnet or the interface is down), the route is marked as hidden and not installed in the forwarding table. This behavior can be observed with 'show route protocol static' and 'show route hidden' commands.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
Visual reference
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.
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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: The next-hop 192.168.1.1 is not reachable. — A static route becomes active only if the next-hop address is reachable via a directly connected interface or another active route. If 192.168.1.1 is not reachable (e.g., no ARP entry, interface down, or no matching subnet), the route remains hidden (inactive) in the routing table. Junos verifies next-hop reachability before installing a static route into the forwarding table.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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