Quick Answer
The correct commands to display the IPv4 unicast routing table are show route and show route table inet.0. This is because in Junos OS, the default routing instance is the master instance, and its primary IPv4 unicast table is named inet.0; issuing the show route command without any filters implicitly displays the contents of this inet.0 table, while the explicit show route table inet.0 command directly targets that same table. On the JNCIA-Junos exam, this question tests your understanding of Junos routing table naming conventions and default behavior, often appearing as a multiple-select item where a common trap is choosing show route table inet.1 (which is the multicast table) or show route protocol static (which filters by protocol). A reliable memory tip is to remember that inet.0 is the "zero" for unicast, as it holds all unicast routes by default, and any show route command without a table modifier defaults to this table.
This JNCIA-JUNOS practice question tests your understanding of operational monitoring and maintenance. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
Which two commands display the IPv4 unicast routing table? (Choose two.)
show ip route
Why wrong: Cisco command, not valid in Junos.
show route protocol ospf
Why wrong: Shows only OSPF routes, not full table.
show route
Shows the default routing table (inet.0).
show route table inet.0
Shows the inet.0 table directly.
show routing
Why wrong: Not a valid command in Junos.
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
Option C is correct because the 'show route' command without any filters displays the entire IPv4 unicast routing table (inet.0) by default in Junos OS. Option D is correct because 'show route table inet.0' explicitly targets the main IPv4 unicast routing table, which is the default routing instance's inet.0 table.
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 ip route
Why it's wrong here
Cisco command, not valid in Junos.
show route protocol ospf
Why it's wrong here
Shows only OSPF routes, not full table.
show route
Why this is correct
Shows the default routing table (inet.0).
Related concept
Read the scenario before looking for a memorised answer.
show route table inet.0
Why this is correct
Shows the inet.0 table directly.
Related concept
Read the scenario before looking for a memorised answer.
show routing
Why it's wrong here
Not a valid command in Junos.
Common exam traps
The trap here is that candidates familiar with Cisco IOS may incorrectly choose 'show ip route' (Option A) or 'show routing' (Option E), not realizing Junos uses the 'show route' command and organizes routing information into named tables like inet.0.
Trap categories for this question
Command / output trap
Cisco command, not valid in Junos.
Detailed technical explanation
In Junos, the routing table is organized into multiple tables per address family and routing instance; inet.0 is the default IPv4 unicast table. The 'show route' command without arguments defaults to inet.0, but you can also specify other tables like inet6.0 for IPv6 or table names for non-default routing instances. This table-based architecture allows Junos to maintain separate routing tables for different protocols and instances, which is critical in MPLS L3VPN or VRF-lite deployments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Operational Monitoring and Maintenance — This question tests Operational Monitoring and Maintenance — Read the scenario before looking for a memorised answer..
The correct answer is: show route — Option C is correct because the 'show route' command without any filters displays the entire IPv4 unicast routing table (inet.0) by default in Junos OS. Option D is correct because 'show route table inet.0' explicitly targets the main IPv4 unicast routing table, which is the default routing instance's inet.0 table.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 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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