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Aflter completing this lesson you should be able to do the following:Use Database Control to --create additional listeners --create oracle net service aliases --configure connect time failover --control the oracle net listenerUse the Oracle Net Manager to configure client and middle-tier connectionsUse TNSPING to test Oracle Net connectivityOracle Net ServicesOracle net services enable network connections from a client or middle-tier application to the oralce da

1.Establishing a connectionAfter oracle net names resolution is complete ,a connection request is passed from the user or middle-tier application to the Oracle Net Listener.The listener receives a CONNECT packet and checks to see whether that CONNECT packet is requesting a valid Oracle Net service name..If the service name is not requested ,the listener acknowledges the connect reqeust and does nothing else.If an invalid service name is requested ,the listener transmits an error code to the user