Refer to the diagram. Which OSPF configuration command is required to configure Area 3
as a totally stubby area? Select the best response.

A.
On the ABR
router ospf 10
area 3 nssa

B.
On the ABR
router ospf 10
area 3 stub

C.
On all Area 3 routers
router ospf 10
area 3 stub no-summary

D.
On all Area 3 routers
router ospf 10
area 3 stub

E.
On the ABR
router ospf 10
area 3 stub no-summary

Explanation:
To make an area “totally stubby” we must apply the “area area-idstub no-summary”
command on the ABR (the middle router in this case)and area area-id stub” commands to
all other routers in that area.