FS labelling vs network protocols
SMB - server message block - communications protocol that backs typical CIFS (common internet file system) FS's.
Samba: open source implementation of windows communication, authentication and presentation protocols and APIs.
Windows AD. An authentication mechanism designed to confuse Samba users.
<none of the above is intended as a dictionary definition or an implementation guide. These are purely my perspective. And I have been known to be wrong>