Microsoft still hosts the redistributable package for legacy purposes:
Using :
To ensure optimal performance and security when using the Microsoft SQL Server Native Client 2012, follow these best practices and recommendations: microsoft sql server native client 2012
Provider=SQLNCLI11;Server=myServer\instance;Database=myDB;Trusted_Connection=yes; Microsoft still hosts the redistributable package for legacy
It is a single dynamic-link library (DLL) that contains both the provider and the ODBC driver. It was released in conjunction with SQL Server 2012 and introduced support for new features introduced in that version, such as AlwaysOn Availability Groups and the datetime2 data type. microsoft sql server native client 2012