The answer is 2. This is correct because in Junos, a static default route is defined by the destination prefix 0.0.0.0/0, and the exhibit shows two such routes, each with a different next-hop address of 0.0.0.0, confirming exactly two static default routes are configured. On the JNCIA-Junos exam, counting static default routes tests your ability to distinguish a default route from other static routes; a common trap is confusing a next-hop of 0.0.0.0 with the destination prefix—remember that the destination 0.0.0.0/0 is what makes it a default, not the next-hop value. This concept appears frequently in routing fundamentals sections, where you must parse configuration output quickly. A helpful memory tip: think of the destination as “anywhere” (0.0.0.0/0) and the next-hop as “the exit door”—if you see two “anywhere” entries with different exit doors, you have two static default routes.
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 protocol static
inet.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0.0.0.0/0 *[Static/5] 00:10:00, metric2 0
> to 10.0.0.1 via ge-0/0/0.0
[Static/10] 00:05:00, metric2 0
to 10.0.0.2 via ge-0/0/1.0
Refer to the exhibit. How many static default routes are configured?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
2
Option D is correct because the exhibit shows two static routes with a next-hop of 0.0.0.0, which are static default routes. In JUNOS, a static default route is defined by a destination prefix of 0.0.0.0/0 (or ::/0 for IPv6). The configuration lists two such routes, each with a different next-hop address, confirming two static default 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.
✗
1
Why it's wrong here
Two routes are present.
✗
0
Why it's wrong here
There are two static default routes shown.
✗
3
Why it's wrong here
Only two routes are shown.
✓
2
Why this is correct
Two static routes for 0.0.0.0/0 with different preferences.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may miscount the number of default routes by including non-default static routes (e.g., 10.0.0.0/8) or by overlooking that a default route must have a prefix length of /0, leading to an incorrect count.
Trap categories for this question
Command / output trap
There are two static default routes shown.
Detailed technical explanation
How to think about this question
In JUNOS, a static default route is defined with the destination prefix 0.0.0.0/0 (IPv4) or ::/0 (IPv6). When multiple static default routes exist, they are installed in the routing table with equal preference (default 5) unless modified, and load-balancing or failover behavior depends on the next-hop configuration and protocol settings like 'no-readvertise' or 'passive'. In real-world scenarios, multiple static defaults are often used for dual-homed connections to different ISPs, requiring careful management of routing policies to control traffic flow.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 — Option D is correct because the exhibit shows two static routes with a next-hop of 0.0.0.0, which are static default routes. In JUNOS, a static default route is defined by a destination prefix of 0.0.0.0/0 (or ::/0 for IPv6). The configuration lists two such routes, each with a different next-hop address, confirming two static default routes.
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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