- A
The static route must have a lower preference than any dynamic route to the same prefix.
Why wrong: Preference determines which route is chosen among multiple routes to the same prefix, but does not affect resolution of the next-hop.
- B
The next-hop must have an ARP entry in the ARP table.
Why wrong: ARP is used for directly connected next-hops, not for recursive resolution.
- C
The next-hop 192.168.1.1 must be reachable via an active route (e.g., a direct or OSPF route).
Indirect next-hops require an active route to the next-hop address for the static route to be installed.
- D
The metric of the static route must be lower than that of any other route to the same prefix.
Why wrong: Metric is not considered for static route installation; it is used for tie-breaking among routes of the same protocol.
JNCIA-JUNOS Routing Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 static route to 10.0.0.0/8 has next-hop 192.168.1.1. The route is not installed in the routing table. Which condition must be met for the route to become active?
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 must be reachable via an active route (e.g., a direct or OSPF route).
The correct answer is C. For a static route with an indirect next-hop, the next-hop must be reachable via another active route. This is called recursive route resolution. Option A is incorrect because static routes do not depend on an ARP entry directly; they require a route to the next-hop. Option B is incorrect because preference affects selection, not installation. Option D is incorrect because metric is not used by static routes for resolution.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
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 static route must have a lower preference than any dynamic route to the same prefix.
Why it's wrong here
Preference determines which route is chosen among multiple routes to the same prefix, but does not affect resolution of the next-hop.
- ✗
The next-hop must have an ARP entry in the ARP table.
Why it's wrong here
ARP is used for directly connected next-hops, not for recursive resolution.
- ✓
The next-hop 192.168.1.1 must be reachable via an active route (e.g., a direct or OSPF route).
Why this is correct
Indirect next-hops require an active route to the next-hop address for the static route to be installed.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
The metric of the static route must be lower than that of any other route to the same prefix.
Why it's wrong here
Metric is not considered for static route installation; it is used for tie-breaking among routes of the same protocol.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related JNCIA-JUNOS OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this JNCIA-JUNOS question test?
Routing Fundamentals — This question tests Routing Fundamentals — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: The next-hop 192.168.1.1 must be reachable via an active route (e.g., a direct or OSPF route). — The correct answer is C. For a static route with an indirect next-hop, the next-hop must be reachable via another active route. This is called recursive route resolution. Option A is incorrect because static routes do not depend on an ARP entry directly; they require a route to the next-hop. Option B is incorrect because preference affects selection, not installation. Option D is incorrect because metric is not used by static routes for resolution.
What should I do if I get this JNCIA-JUNOS question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related JNCIA-JUNOS OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 24, 2026
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