Examine the command: SQL> CONNECT hr/hr@orcl Which two configurations allow this command to execute successfully? (Choose two.)

The `SERVICE_NAME` value in `tnsnames.ora` should typically match the database's actual service name; it's the `orcl` TNS alias itself that needs to resolve to this service, rather than the `SERVICE_NAME` within `CONNECT_DATA` explicitly being `orcl`.

The `SERVICE_NAMES` initialization parameter in the database instance defines the service names that the database registers with the listener, making it discoverable and connectable via those names.

The `orcl` TNS alias must be defined in a client-side configuration file (like tnsnames.ora) or via a naming method (like LDAP) so that the client application can resolve 'orcl' to the database's network address and service name.

The `tnsnames.ora` file is a client-side configuration for resolving network aliases and is not typically required on the database server itself for a client to connect to that server.

The `TNS_ADMIN` environment variable specifies the directory where client network configuration files (like `tnsnames.ora`) are located, not the TNS alias itself.