NSE7 Advanced Networking and SD-WAN Practice Question
A FortiGate is configured with OSPF multi-area. The administrator wants to ensure that routes from area 0 are redistributed into area 1. Which OSPF configuration is required?
⚠ Common exam trap
Many candidates confuse route redistribution (importing external routes) with the automatic inter-area route advertisement performed by ABRs, leading them to select options involving redistribution policies or area type modifications.
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
✓
No additional configuration is needed; ABRs automatically advertise inter-area routes
OSPF ABRs (Area Border Routers) automatically advertise inter-area routes between areas by default. In a multi-area OSPF setup, the ABR learns Type 3 LSAs from area 0 and floods them into other areas (like area 1) without any additional redistribution configuration. No explicit redistribution policy is needed for inter-area route advertisement.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable 'redistribute connected' on the ABR
Why it's wrong here
'Redistribute connected' injects directly connected subnets as external type 5 LSAs; it does not move area 0's inter-area routes into area 1, which the ABR already advertises as type 3 LSAs. It is tempting because redistribution does share routes, and would be correct when advertising connected interfaces into OSPF.
- ✗
Set the 'area type' to 'nssa' on area 1
Why it's wrong here
Setting area 1 as NSSA blocks type 5 external LSAs and generates type 7 LSAs; it does not control whether area 0's inter-area routes reach area 1, which the ABR already floods as type 3 LSAs. NSSA is tempting for stub-like external injection, and would be correct when importing external routes into a non-backbone area.
- ✗
Configure a route redistribution policy under OSPF
Why it's wrong here
Area 0 routes are already propagated into area 1 as inter-area (type 3) LSAs by the ABR; redistribution policy governs external routes injected into OSPF, not intra-domain LSA flooding. Redistribution is tempting because it does move routes between domains, and would be correct when importing static or connected prefixes into OSPF.
- ✓
No additional configuration is needed; ABRs automatically advertise inter-area routes
Why this is correct
Area Border Routers automatically generate and advertise inter-area routes, including those from the backbone, into attached non-backbone areas. Because area 0 routes are injected into area 1 by default, no redistribution or extra OSPF configuration is required to satisfy the stem.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This NSE7 practice question is part of Courseiva's free Fortinet 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 NSE7 exam.