A) Explanation:
R4
Int range et0/0 -- 1
Ip ospf authentication message-digest
Ip ospf message-digest-key 1 md5 CCNP
Router ospf 1
Redistribute connected subnets route-map to-ospf metric-type 1
Copy run start
R5
Int range et0/0 -- 1
Ip ospf authentication message-digest
Ip ospf message-digest-key 1 md5 CCNP
Interface eth 0/1
Ip ospf cost 10
Copy run start
VERIFICATION:-
Glory
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