Quick Answer
The answer is the `show route` command. This command is the correct tool because it displays the entire routing table, which contains all active routes learned through static configuration, direct connections, or dynamic routing protocols like OSPF and BGP. When verifying the routing table entry for a remote network, `show route` reveals the next-hop IP address, the outgoing interface, and the route preference or metric, directly confirming whether the path to that network is installed and reachable. On the JNCIA-Junos exam, this question tests your understanding of fundamental operational commands for troubleshooting Layer 3 connectivity; a common trap is confusing `show route` with `show route advertising-protocol` or `show interface terse`, which show different data. Remember that `show route` is your go-to for checking what the router actually knows and will use to forward traffic, while other commands show only configuration or protocol-specific information. A helpful memory tip is to think of “route” as the router’s roadmap—if the destination isn’t on that map, the packet cannot be delivered.
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 engineer is troubleshooting a reachability issue between two directly connected routers. Both routers have IP addresses configured on their interfaces and the interfaces are up. Which command would the engineer use to verify the routing table entry for the remote network?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
show route
Displays the routing table, including directly connected and learned routes.
show interfaces terse
Why wrong: Shows interface status and IP addresses, not the routing table.
show configuration interfaces
Why wrong: Shows the interface configuration, not the operational routing table.
show arp
Why wrong: Shows the ARP cache, not the routing table.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
show route
The 'show route' command displays the routing table, which contains all active routes learned via static configuration, direct connections, or dynamic routing protocols. To verify the routing table entry for a specific remote network, this command shows the next-hop IP address, interface, and route preference/metric, directly confirming whether the remote network is reachable.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
show route
Why this is correct
Displays the routing table, including directly connected and learned routes.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
show interfaces terse
Why it's wrong here
Shows interface status and IP addresses, not the routing table.
show configuration interfaces
Why it's wrong here
Shows the interface configuration, not the operational routing table.
show arp
Why it's wrong here
Shows the ARP cache, not the routing table.
Common exam traps
The trap here is that candidates confuse verifying interface configuration or ARP entries with verifying routing table entries, assuming that if interfaces are up and IPs are configured, the route must exist, but the routing table must be explicitly checked to confirm the remote network is reachable.
Trap categories for this question
Command / output trap
Shows interface status and IP addresses, not the routing table.
Detailed technical explanation
The routing table in Junos is built from multiple sources (direct, static, OSPF, BGP, etc.) and uses route preference (administrative distance) to select the best path. The 'show route' command can be filtered with a specific prefix (e.g., 'show route 192.168.1.0/24') to verify if a route exists and which protocol installed it, which is critical when troubleshooting reachability issues that may involve route summarization or missing routes.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Routing Fundamentals — study guide chapter
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FAQ
Routing Fundamentals — This question tests Routing Fundamentals — Read the scenario before looking for a memorised answer..
The correct answer is: show route — The 'show route' command displays the routing table, which contains all active routes learned via static configuration, direct connections, or dynamic routing protocols. To verify the routing table entry for a specific remote network, this command shows the next-hop IP address, interface, and route preference/metric, directly confirming whether the remote network is reachable.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This JNCIA-JUNOS practice question is part of Courseiva's free Juniper Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the JNCIA-JUNOS exam.
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