A customer recently asked the following question, "What type of connectivity is there between your application and the database for an Oracle instance? (Oracle Net, JDBC etc.)" Sadly, I actually don't know the answer to this. JDBC is obviously wrong, but before I write my BS response to this, I would actually like to know: What is the underlying protocol that DBD::Oracle uses to talk to the Oracle Database? Is it ODBC or some proprietary protocol.