What Does Server Message Block Protocol (SMB Protocol) Mean?
Server Message Block Protocol is predominately a Microsoft Windows protocol that allows for the sharing of folders, printers and serial ports within a given network. The current version is SMBv2 which was deployed with Windows Vista, and has since undergone more changes under Windows 7.
Techopedia Explains Server Message Block Protocol (SMB Protocol)
Server Message Block is a networking protocol that was originally developed by IBM. Microsoft improved on the protocol in the 1990s, and it now gives Windows-based networks the ability to create, modify and delete shared folders, printers and serial ports.