Which two statements are true regarding listeners?

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

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.



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