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.来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/17013648/viewspace-1199472/ ,如需转载,请注明出处,否则将追究法律责任。