A listener configuration file that identifies the following for a listener: Unique name Protocol addresses on which the listener is accepting connection requests Services that the listener listens for The listener.ora file typically resides in $ORACLE_HOME/network/admin on UNIX platforms. Oracle9 does not require identification of the database service because of service registration. However, static service configuration is required for Oracle Enterprise Manager.

A listener configuration file that identifies the following for a listener: Unique name Protocol addresses on which it accepts connection requests Services for which it is listening

A configuration file that describes one or more Transparent Network Substrate (TNS) listeners on a server.

A configuration file for the listener that identifies listener name, protocol addresses for accepting connection requests, and the services for which it is listening. File listener.ora typically resides in ORACLE_BASE\ORACLE_HOME\network\admin on Windows operating systems.

LISTENER.ORA is an ASCII text file used to configure database listeners (required to accept remote connection requests). This file normally resides in the ORACLE_HOME\NETWORK\ADMIN directory.