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You work as a database administrator for Supportcenter.cn. You enabled tracing while creating a listener to your database. What additional information is available to you when you enable tracing？（）
A:Information about each Oracle Net connection.
B:Information about each entry in theLinstener.orafile
C:Information about the changed done in the database
D:Information about the different listeners in your system
E:Information about all thenondatabasefiles required to operate the database

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出自：Oracle认证

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