Refer to the exhibit. What additional commands should be used to configure OSPF area 5 as
a Totally Stubby area?

A.
area 0 stub on routers R4 and R5

B.
area 5 stub on routers R4 and R5

C.
area 5 stub no-summary on routers R4 and R5

D.
area 0 stub no-summary on router R4 and area 5 stub no-summary on router R5

E.
area 5 stub no-summary on router R4 and area 5 stub on router R5

Explanation:
The point of the question is the configuration of totally stub.
From this picture, we can find that R4 is an ABR, network 10.1.45.0/24 is in area 5. We have
two commands to configure totally stub.
First: area 5 stub no-summary, it’s on ABR.
Second: area xxx stub ,it’s on other routers which belong to totally stub except ABR.