Which two functions of an NSSA an OSPF network design are true? (Choose two)

Opaque LSAs (Types 9, 10, and 11) are used for OSPF extensions such as MPLS Traffic Engineering; NSSA relies on Type 7 LSAs, not opaque LSAs.

NSSA does not resolve suboptimal routing caused by multiple exit points from an area; that issue is addressed by techniques such as route summarization or filtering at the ABR, not by the NSSA area type itself.

In an NSSA, the ASBR (Autonomous System Boundary Router) originates Type 7 LSAs to advertise external routing information within the area. The ABR then translates these Type 7 LSAs into Type 5 LSAs when redistributing them to the rest of the OSPF domain, maintaining compatibility with standard OSPF areas.

It is the ASBR, not the ABR, that originates Type 7 LSAs inside the NSSA; the ABR's role is to convert those Type 7 LSAs into Type 5 LSAs for distribution to other OSPF areas.

The defining purpose of an NSSA is to allow an ASBR inside a stub-like area to inject external routing information into OSPF, which a standard stub area prohibits. This makes NSSA useful when a branch area must redistribute external routes while still benefiting from reduced LSA flooding overhead.