In which configuration mode do you configure the ip ospf authentication-key 1 command?
A . Interface
B . routing process
C . global
D . privileged
Answer: A
Explanation:
ip ospf authentication-key is used under interface configuration mode, so it’s in interface level, under global configuration mode. If it asks about interface level then choose that. interface Serial0 ip address 192.16.64.1 255.255.255.0 ip ospf authentication-key c1$c0