Question 1mediumdrag order
Review the full routing breakdown →Question 925 of 2,152
Quick Answer
The correct order ends with testing reachability to a host in the summarized range, as this step confirms that the summary route is actually forwarding traffic correctly. This sequence is grounded in a layered verification approach: you must first confirm the summary exists in the routing table, then validate its propagation in the OSPF database via the summary LSA, check for any conflicting more-specific routes that could cause suboptimal routing, and verify that summarization is enabled under show ip protocols before finally performing a live reachability test. On the Cisco CCNP ENARSI 300-410 exam, this drag-and-drop task tests your ability to distinguish between configuration verification and operational validation—a common trap is placing the reachability test too early, before confirming the route is even present. A useful memory tip is "Table, Database, Suboptimal, Protocols, Ping"—the first letters spell TDSPP, which you can recall as "The Data Should Pass Properly."
300-410 Route Summarization Practice Question
This 300-410 practice question tests your understanding of route summarization. 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.
Drag and drop the steps to verify and validate route summarization operational state into the correct order, from first to last.
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
View the routing table for the summary route
Begin by checking the routing table on the summarizing router to see the summary route. Then, inspect the OSPF database to confirm the summary LSA. Next, verify that the summary is not causing suboptimal routing by checking for more specific routes. After that, use show ip protocols to confirm summarization is enabled. Finally, test reachability to a host within the summarized range.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
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
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this 300-410 question test?
Route Summarization — This question tests Route Summarization — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: View the routing table for the summary route — Begin by checking the routing table on the summarizing router to see the summary route. Then, inspect the OSPF database to confirm the summary LSA. Next, verify that the summary is not causing suboptimal routing by checking for more specific routes. After that, use show ip protocols to confirm summarization is enabled. Finally, test reachability to a host within the summarized range.
What should I do if I get this 300-410 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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