多选题Which three pieces of information are to be mandatorily provided while creating a new listener using Enterprise Manager Database Control？（）Athe port used by the listenerBthe protocol used by the listenerCthe server name where the listener runsDthe log file and trace file destination for the listenerEthe database services to be registered with the listener
多选题
Which three pieces of information are to be mandatorily provided while creating a new listener using Enterprise Manager Database Control？（）
A
the port used by the listener
B
the protocol used by the listener
C
the server name where the listener runs
D
the log file and trace file destination for the listener
E
the database services to be registered with the listener
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