Provider=SQLNCLI11;Server=myServer\instance;Database=myDB;Trusted_Connection=yes;
The 2012 version brought several improvements over its predecessors (SQL Server 2005 and 2008 Native Clients): microsoft sql server native client 2012
Provider=SQLNCLI11;Server=myServer;Database=myDB;MARS Connection=True; XML data type support
(also known as SNAC 11.0) is a standalone data access library that combines ODBC and OLE DB technologies into a single dynamic-link library (DLL). It was designed to provide native data access for applications connecting to SQL Server 2005 through 2012, offering features like Multiple Active Result Sets (MARS), XML data type support, and query notifications. Key Features and Capabilities microsoft sql server native client 2012