In OSPF, a Not-So-Stubby Area (NSSA) is a type of area that allows for the injection of external routes (like a standard area) while maintaining some stub area characteristics.
Type 7 LSAs (NSSA External LSAs) are generated by ASBRs within an NSSA.
An ABR at the NSSA boundary translates these Type 7 LSAs into Type 5 LSAs to propagate them into the rest of the OSPF domain.
This translation is necessary because Type 5 LSAs are the standard method for advertising external routes in OSPF.
Therefore, the statement is TRUE.
[Reference:, Huawei HCIE Datacom Official Certification Guide, Huawei OSPF Configuration and Maintenance Guide, ===========, ]
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