Which one of the following statements about the TNSPING utility is correct？（）<br>A:It helps you to determine whether or not the Oracle database is running.<br>B:It requires the username and password to check the connectivity of the service.<br>C:It does not require the username and password to check the connectivity of the service.<br>D:It establishes a session with the database and checks the connectivity of the service.

Which one of the following statements about the TNSPING utility is correct？（）
A:It helps you to determine whether or not the Oracle database is running.
B:It requires the username and password to check the connectivity of the service.
C:It does not require the username and password to check the connectivity of the service.
D:It establishes a session with the database and checks the connectivity of the service.

出自：Oracle认证

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