NSE7 Advanced Networking and SD-WAN Practice Question
This NSE7 practice question tests your understanding of advanced networking and sd-wan. 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 FortiGate is running OSPF in a multi-area network. The administrator notices that routes from area 1 are not being redistributed into area 0. The configuration includes 'redistribute connected' under OSPF. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The 'redistribute connected' command is missing under the OSPF process
By default, OSPF only redistributes routes from other routing protocols or connected routes if configured. However, routes from other OSPF areas are not redistributed; they are learned via inter-area LSAs. If redistribution is not configured for connected or static routes, the issue might be that the routes are not being generated. Option C is a plausible cause: missing 'redistribute connected' under the OSPF process.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The OSPF network type is not broadcast
Why it's wrong here
Network type affects neighbor adjacency, not route redistribution between areas.
✗
Area 1 is a stub area
Why it's wrong here
Stub areas do not accept external routes, but inter-area routes are still passed.
✗
The ABR is not configured with 'area 0'
Why it's wrong here
An ABR automatically connects area 0 and other areas; this would prevent inter-area routing entirely.
✓
The 'redistribute connected' command is missing under the OSPF process
Why this is correct
If the routes are connected interfaces in area 1, they need to be redistributed into OSPF to be advertised to other areas.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
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 NSE7 OSPF questions on adjacency and route selection.
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: The 'redistribute connected' command is missing under the OSPF process — By default, OSPF only redistributes routes from other routing protocols or connected routes if configured. However, routes from other OSPF areas are not redistributed; they are learned via inter-area LSAs. If redistribution is not configured for connected or static routes, the issue might be that the routes are not being generated. Option C is a plausible cause: missing 'redistribute connected' under the OSPF process.
What should I do if I get this NSE7 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 NSE7 OSPF questions on adjacency and route selection.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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