tnsnames.ora, listener.ora
What does the following key words mean and related to SID, Global database name?
1) tnsames.ora
SERVICE_NAME = xxxxx
(ADDRESS = (PROTOCOL = IPC)(KEY = kstdby1)) key could also be EXTPROC1521
(ADDRESS = (PROTOCOL = TCP)(HOST = xxxxx)(PORT = 1521))
2) listener.ora
 (GLOBAL_DBNAME = XXXX)
	
 (SID_NAME = XXXX)
Thanks,
Arun