This article contain a table to understand what version you will end up, depending on what Windows version is running as the SMB client and what version of Windows is running as the SMB server.

https://blogs.technet.microsoft.com/josebda/2012/06/06/windows-server-2012-which-version-of-the-smb-protocol-smb-1-0-smb-2-0-smb-2-1-or-smb-3-0-are-you-using-on-your-file-server/