Connect system /oracle@orclSET SERVEROUTPUT ONSQL> EXEC dbms_output.put_line(sys_context('USERENV', 'CURRENT_USER'));SYSTEMSQL> EXEC dbms_output.put_line(sys_context('USERENV', 'SESSION_USER'));SYSTEMSQL> EXEC dbms_output.put_line(sys_context('USERENV', 'IP_ADDRESS'));192.168.1.2SQL> SELECT sys_context('USERENV', 'IP_ADDRESS') FROM DUAL;192.168.1.2SQL> EXEC dbms_output.put_line(sys_context('USERENV', 'NETWORK_PROTOCOL'));tcpSQL> EXEC dbms_output.put_line(sys_context('USERENV', 'AUTHENTICATION_TYPE')); DATABASESQL> SELECT sys_context('USERENV', 'AUTHENTICATION_TYPE') FROM DUAL;DATABASESQL> SELECT sys_context('USERENV', 'CURRENT_USER') FROM DUAL;SYSTEMSQL> SELECT sys_context('USERENV', 'NETWORK_PROTOCOL') FROM DUAL;TCP