Understanding SQL Server Net-Libraries

I know that SQL Server and its clients interact with each other using different Net-Libraries or network protocols. But what are these Net-Libraries that SQL Server uses and how do each of these differ from the others. Also, in which scenario is one preferred over the others? SQL Server provides different Net-Libraries, known as Dynamic-Link Library (DLL), to let clients communicate with SQL Server using different network protocols. These Net-Libraries specify which networking protocols to use while exchanging data back and forth between SQL Server and the clients. To learn more about it click here.