Sockets in windows vs linux

Are there differences in how Windows and Linux implements sockets? Is this a os concert or rather one entirely dependant on programming platform?

From stackoverflow

• Presumably their implementations are very different (Though it's hard to tell, as the windows source code isn't available.).

  Both provides a rather similar API for programmers to use, based on the BSD socket api , and the socket API for various programming languages are a wrapper around that native C API.