Refer to the exhibit.Which command must be applied to R2 for an OSPF neighborship to form?
A. network 20.1.1.2.0.0.0.0 area 0
B. network 20.1.1.2 255.255.0.0. area 0
C. network 20.1.1.2.0.0.255.255 area 0
D. network 20.1.1.2 255.255.255 area 0
Answer:A
Refer to the exhibit.Which command must be applied to R2 for an OSPF neighborship to form?
A. network 20.1.1.2.0.0.0.0 area 0 B. network 20.1.1.2 255.255.0.0. area 0 C. network 20.1.1.2.0.0.255.255 area 0 D. network 20.1.1.2 255.255.255 area 0
Explanation: The network 20.0.0.0 0.0.0.255 area (” command on R2 did not cover the IP address of Fal/1 interface of R2 so OSPF did not run on this interface. Therefore we have to use the command “network 20.1.1.2 0.0.255.255 area 0” to turn on OSPF on this interface.