1. TNSNAMES.ORA? TNSNAMES.ORA is a configuration file that Oracle database use. It allows users and applications to connect to Oracle Databases by matching a connection name with all of the relevant details. 2. Where is the TNSNAMES.ORA located? $ORACLE_HOME\network\admin\ $ORACLE_HOME : the location that the Oracle database is installed in. 3. How to find ORACLE_HOME and the TNSNAMES.ORA Locati..