多选题Which of the following is true about routers internal to a totally NSSA area?（）ARouters cannot redistribute external routes into the area.BRouters should have zero Type 3 LSAs in their LSDBs.CRouters should have zero Type 5 LSAs in their LSDBs.DRouters should learn default routes from the ABRs attached to the area.
多选题
Which of the following is true about routers internal to a totally NSSA area?（）
A
Routers cannot redistribute external routes into the area.
B
Routers should have zero Type 3 LSAs in their LSDBs.
C
Routers should have zero Type 5 LSAs in their LSDBs.
D
Routers should learn default routes from the ABRs attached to the area.
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