Connection String of TNSNAMES.ORA
// Example: Connection String
(DESCRIPTION=
(CONNECT_TIMEOUT=5sec) // Required connection timeout
(ADDRESS = (PROTOCOL = TCP)(HOST = dbserver.example.com)(PORT = 1521))
// PROTOCOL: Connection protocol (e.g., HTTP)
// HOST: Server address
// PORT: Port number
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = ORCL)
)
// The service name (or SID) of the target database
)