A. A different procedure is required to restore a database from compressed backups
B. The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C. Using this command to create backups minimizes the bandwidth consumed
D. Using this command to create backups improves the performance of the backup process

A. It produces an error because a fully qualified host name needs to be specified.
B. It produces an error because the range of ports associated with the hosts has not been specified.
C. It creates an access control list （ACL） with the user ACCT_MGR who gets the CONNECT and  RESOLVE privileges.
D. It creates an access control list （ACL） with the user ACCT_MGR who gets the CONNECT privilege but not the RESOLVE privilege.