The answer is `show route forwarding-table destination 10.0.0.0/24`. This command is the correct choice because it displays the forwarding table, which is the actual hardware or kernel-level table used to forward packets, and it explicitly shows all next-hops being used for load-balanced destinations. While the routing table may list multiple paths, only the forwarding table confirms that both next-hops are actively installed and utilized in the data plane. On the JNCIA-Junos exam, this question tests your understanding of the critical distinction between the routing table (control plane) and the forwarding table (forwarding plane), a common trap where students mistakenly rely on `show route` output. A useful memory tip is: "Routes are thought, forwards are fought"—the routing table thinks about paths, but the forwarding table fights the traffic, so always check the forwarding table to verify actual load-balanced next-hop usage.
JNCIA-JUNOS Routing Fundamentals Practice Question
This JNCIA-JUNOS practice question tests your understanding of routing fundamentals. 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.
A router has two ISIS adjacencies to the same router, both with equal metrics. The router installs both routes in the routing table and performs load balancing. The network team wants to verify that both next-hops are being used for a particular destination. Which command provides this information?
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.
Option A is correct because `show route forwarding-table destination` shows the actual next-hops used in the forwarding plane, including load-balanced paths. Option B is wrong because `show route` with detail may show multiple next-hops but not the hardware forwarding decision. Option C is wrong because it shows all ISIS routes, not specific next-hop usage. Option D is wrong because extensive output still shows routing table, not forwarding table.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
`show route 10.0.0.0/24 extensive`
Why it's wrong here
Extensive output provides routing table details but not the forwarding table.
This command displays the forwarding table, which shows the actual next-hops used for forwarding, including load-balanced paths.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
✗
`show route protocol isis`
Why it's wrong here
This shows all ISIS routes, not specific next-hop usage for a destination.
✗
`show route 10.0.0.0/24 detail`
Why it's wrong here
This shows the routing table entry but may not explicitly indicate which next-hops are used for load balancing in hardware.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
Extensive output provides routing table details but not the forwarding table.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related JNCIA-JUNOS NAT questions on configuration and troubleshooting.
Routing Fundamentals — This question tests Routing Fundamentals — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: `show route forwarding-table destination 10.0.0.0/24` — Option A is correct because `show route forwarding-table destination` shows the actual next-hops used in the forwarding plane, including load-balanced paths. Option B is wrong because `show route` with detail may show multiple next-hops but not the hardware forwarding decision. Option C is wrong because it shows all ISIS routes, not specific next-hop usage. Option D is wrong because extensive output still shows routing table, not forwarding table.
What should I do if I get this JNCIA-JUNOS question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related JNCIA-JUNOS NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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