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.
Exhibit
show route forwarding-table destination 0.0.0.0/0
Routing table: default.inet
Destination Type RtRef Next hop Type Index NhRef Netif
0.0.0.0/0 user 0 192.168.1.1 ucst 1112 2 ge-0/0/0.0
Refer to the exhibit. What does the 'user' type indicate about the route?
Exhibit
show route forwarding-table destination 0.0.0.0/0
Routing table: default.inet
Destination Type RtRef Next hop Type Index NhRef Netif
0.0.0.0/0 user 0 192.168.1.1 ucst 1112 2 ge-0/0/0.0
A
The route is from the kernel.
Why wrong: Kernel routes are shown as 'kern' in the forwarding table.
B
The route was manually configured.
The 'user' type indicates the route was configured by an administrator, typically as a static route.
C
The route is a default route generated by the router.
Why wrong: Default routes generated by the router (e.g., default route from DHCP) would not show as 'user'.
D
The route was learned from a routing protocol.
Why wrong: Protocol-learned routes typically show as 'other' or have a protocol-specific type.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The route was manually configured.
In Junos, the 'user' type in a route table indicates that the route was manually configured, typically via a static route statement under the 'routing-options' hierarchy. This distinguishes it from routes learned dynamically through routing protocols or derived from the kernel's interface addresses.
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 is from the kernel.
Why it's wrong here
Kernel routes are shown as 'kern' in the forwarding table.
✓
The route was manually configured.
Why this is correct
The 'user' type indicates the route was configured by an administrator, typically as a static route.
Related concept
Read the scenario before looking for a memorised answer.
✗
The route is a default route generated by the router.
Why it's wrong here
Default routes generated by the router (e.g., default route from DHCP) would not show as 'user'.
✗
The route was learned from a routing protocol.
Why it's wrong here
Protocol-learned routes typically show as 'other' or have a protocol-specific type.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'user' with 'kernel' or 'direct' routes, mistakenly thinking any route not learned from a protocol must be kernel-generated, but Junos explicitly labels manually configured static routes as 'user' to differentiate them from kernel-derived interface routes.
Trap categories for this question
Command / output trap
Kernel routes are shown as 'kern' in the forwarding table.
Detailed technical explanation
How to think about this question
The 'user' route type in Junos corresponds to static routes configured manually by an administrator. Under the hood, these routes are stored in the routing table with a preference of 5 by default (unless overridden), and they are not subject to dynamic updates or protocol-specific metrics. In real-world scenarios, static routes are often used for simple network topologies or for pointing to specific next-hops where dynamic routing is unnecessary or undesirable.
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.
Quick reference
Routing Protocol Comparison
Protocol
Metric
Max Hops
Algorithm
Type
RIP v2
Hop count
15
Bellman-Ford
Distance vector
OSPF
Cost (bandwidth)
Unlimited
Dijkstra (SPF)
Link state
EIGRP
Composite metric
Unlimited
DUAL
Hybrid
IS-IS
Cost
Unlimited
Dijkstra
Link state
BGP
Policy / attributes
Unlimited
Path vector
Path vector
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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: The route was manually configured. — In Junos, the 'user' type in a route table indicates that the route was manually configured, typically via a static route statement under the 'routing-options' hierarchy. This distinguishes it from routes learned dynamically through routing protocols or derived from the kernel's interface addresses.
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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Question Discussion
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