Oracle OraClient Network Configuration

After Oracle OraClient has been installed, network connection can be added, edited manually from Network Configuration File. This file locates in X:\oracle\product\10.2.0\client_1\network\admin\tnsnames.ora. Its syntax looks like

ServiceName =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = HostName)(PORT = HostPort))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ServiceName)
    )
  )