I installed Oracle database 11g enterprise edition to my laptop. When I was installing Oracle, at the beginning I selected Desktop Class (not server class) option.
Now I am trying to make remote connection to my Oracle database from another PC but I cannot connect to Oracle and get this error message:
"ORA-12545: Connect failed because target host or object does not exist"
even though all Oracle services have been already started.
May the reason be why I installed Oracle as desktop class instead of server class?
My tnsnames.ora file:
ORACLR_CONNECTION_DATA = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (CONNECT_DATA = (SID = CLRExtProc) (PRESENTATION = RO) ) ) DERS = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =localhost)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = Ders) ) )