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.
Exhibit
user@router> show route 10.1.1.0/24
inet.0: 5 destinations, 6 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.1.1.0/24 *[Static/5] 00:12:34, metric 0
> to 192.168.1.1 via ge-0/0/0.0
to 192.168.2.1 via ge-0/0/1.0
Refer to the exhibit. How many next hops are installed for the 10.1.1.0/24 route?
Exhibit
user@router> show route 10.1.1.0/24
inet.0: 5 destinations, 6 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.1.1.0/24 *[Static/5] 00:12:34, metric 0
> to 192.168.1.1 via ge-0/0/0.0
to 192.168.2.1 via ge-0/0/1.0
A
4
Why wrong: Only two next hops are listed.
B
2
Two next hops are shown: one active (with '>') and another without.
C
3
Why wrong: Only two next hops are listed.
D
1
Why wrong: There are two next hops listed, not one.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
2
The route 10.1.1.0/24 has two next hops installed because the routing table shows two distinct next-hop addresses (e.g., 192.168.1.1 and 192.168.2.1) under the same route entry. In JUNOS, when equal-cost paths exist, the route is installed with multiple next hops, and the count reflects the number of unique next-hop entries, not the number of interfaces or paths in a load-balancing set.
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.
✗
4
Why it's wrong here
Only two next hops are listed.
✓
2
Why this is correct
Two next hops are shown: one active (with '>') and another without.
Related concept
Read the scenario before looking for a memorised answer.
✗
3
Why it's wrong here
Only two next hops are listed.
✗
1
Why it's wrong here
There are two next hops listed, not one.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often count the number of interfaces or paths shown in the output (e.g., two interfaces with two IPs each) and mistakenly think each interface represents a separate next hop, when JUNOS counts only the unique next-hop IP addresses.
Detailed technical explanation
How to think about this question
In JUNOS, the 'show route 10.1.1.0/24' command displays all next hops for a given prefix. When multiple next hops are present, the route is installed with a 'next-hop list' that can be used for per-packet or per-flow load balancing, depending on the forwarding policy. The number of next hops is determined by the number of unique next-hop addresses that satisfy the same metric and preference, not by the number of interfaces or protocol sources.
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: 2 — The route 10.1.1.0/24 has two next hops installed because the routing table shows two distinct next-hop addresses (e.g., 192.168.1.1 and 192.168.2.1) under the same route entry. In JUNOS, when equal-cost paths exist, the route is installed with multiple next hops, and the count reflects the number of unique next-hop entries, not the number of interfaces or paths in a load-balancing set.
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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