1. A method for determining a type of Virtual Private Network (VPN) comprising the steps of: representing the network by a model containing a plurality of object classes; evaluating an import/export relationship of a first one and a second one of the object classes; and identifying the network type based on the evaluated relationship; wherein the first object class is a RouteTarget; and wherein the step of evaluating an import/export relationship comprises the step of: determining 
 Im( R 1 )=Ex( R 2 ); and 
 Ex( R 1 )Im( R 1 )=Im( R 2 )Ex( R 2 ); and 
 Ex( R 1 )≠Im( R 2 ) OR 
 Ex( R 1 )∩Im( R 1 )≠Empty set.