I'm facing some concerns about tnsping & telnet in Oracle. In my current understanding:
telnet IP PORTis used to test that you can connect to that machine (at IP addr) and some service is listening at that PORT.tnsping NET_SERVICE_NAME [COUNT]is used to test that you can connect to that machine (at IP addr) and some service is listening at that PORT & that service is an Oracle Listener.
Can someone with a solid knowledge about Oracle verify or point out wrong things in my statements? It is currently hanging in my head, but I am not sure that I have a correct understanding about it.
Tnsping .. uses tnsnames.ora file to connect to the oracle instance. Tnsping on the other hand must get a response from Oracle Net service or daemon running on the server.