NetApp
7-mode/HA pair/V-Series : Configuration : Protocols : CIFS : Understanding CIFS : About CIFS and SMB

About CIFS and SMB
System Manager uses the CIFS protocol to enable file sharing from host storage systems. When your system is first installed and CIFS is configured in Workgroup mode, a login named "administrator" is automatically created. You can use this login to access shares with a blank password.
The Common Internet File System (CIFS) protocol is used to share files. CIFS is the method of transport for Windows Shares. CIFS is an extension of the Server Message Block (SMB) protocol, which is a file-sharing protocol used on Windows and UNIX systems. SMB runs over several different types of networks, including TCP/IP. For most purposes, SMB has been superseded by CIFS. System Manager uses CIFS to support file sharing from host storage systems.