OCP 1Z0 052 34

34. A user, who  is authenticated externally,  logs  in  to a  remote machine and connects  to  the database 
instance. What action would you take to ensure that a user cannot connect to the database instance by 
merely logging in to a remote machine? 
A.Set REMOTE_OS_ROLES to FALSE. 
B.Set the OS_ROLES parameter to FALSE. 
C.Set the REMOTE_OS_AUTHENT parameter to FALSE. 
D.Set the REMOTE_LOGIN_PASSWORD_FILE parameter to NONE. 
Answer: C

Note:
The REMOTE_OS_AUTHENT parameter is deprecated. It is retained for backward compatibility only.