To make OSPF area 4 totally stubby, the following command was issued on the ABR in
router configuration mode: area 4 stub.
Which two things need to be done to finish making area 4 a totally stubby area? (Choose
two.)

A.
Apply the area 4 stubcommand to all routers in the area.

B.
On the ABR, use the area 4 stubcommand with theno-summarykeyword.

C.
On the ABR, specify a default cost for the area with the area default-cost
command.

D.
On the ABR, use the default-information originatescommand to inject a
default route into area 4.

E.
Use the auto-cost command on each router in the area to automaticallydetermine the
cost to other OSPF areas.

Explanation:
To make an area “totally stubby” we must apply the “area area-idstub no-summary”
command on the ABR and area area-id stub” commands to all other routers in that area.
Note: The ABR in a totally stubby area does not create Type 3 summary LSA. It only
creates a default route to outside destinations.