The configuration of the client can be done using Oracle's own Net Configuration Assistant and Net Manager. The first tool is used here. Mainly to configure a local network service name.
Proceed as follows:
Here I make changes to login, the test is still unsuccessful! It doesn't matter, we need to check the tnsnames.ora file: the directory where I am here is: D:\oracle\ora11g\product\11.2.0\dbhome_1\NETWORK\ADMIN.
After the modification, use the ADO assistant to test:
success! Get it! The premise of the above can be successfully connected is that the server-side database monitoring has been configured.
Not finished. . . The next part is the configuration instructions for server monitoring!