The difference between tnsping and telnet?

Question

I'm facing some concerns about tnsping & telnet in Oracle. In my current understanding:

• telnet IP PORT is 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.

Answer 1

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.