Which line in the following OSPF configuration will not be required for MD5 authentication to work?

Which line in the following OSPF configuration will not be required for MD5 authentication to work?

interface GigabitEthernet0/1

ip address 192.168.10.1 255.255.255.0

ip ospf authentication message-digest

ip ospf message-digest-key 1 md5 CCNA

!

router ospf 65000

router-id 192.168.10.1

area 20 authentication message-digest

network 10.1.1.0 0.0.0.255 area 10

network 192.168.10.0 0.0.0.255 area 0

!
A . ip ospf authentication message-digest
B . network 192.168.10.0 0.0.0.255 area 0
C . area 20 authentication message-digest
D . ip ospf message-digest-key 1 md5 CCNA

View Answer

Answer: C