Type 7 LSAs (NSSA External LSAs) are used in Not-So-Stubby Areas (NSSAs) to carry external routing information.
These LSAs are generated only by ASBRs within an NSSA , and later converted to Type 5 LSAs by the ABR .
Stub areas do not allow ASBRs , meaning Type 7 LSAs cannot exist in a stub area .
The question incorrectly states that Type 7 LSAs can be generated in stub areas , which is false .
???? Reference: Huawei HCIA-Datacom Study Guide, OSPF LSA Types and Area Configurations.
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