Oracle 11G OCP 1Z0-052 130

（130）Which two statements are true regarding listeners? (Choose two.)

A.Listeners use only the TCP/IP protocol.

B.Multiple listener processes can run simultaneously on a host.

C.Multiple database instances can be registered with a single listener.

D.The listener-related errors can be traced only at the administrative level.

E.Only one database instance can be registered with a single listener at any time.

答案：（B、C）

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