Formerly known as SMB, the Common Internet File System (CIFS) allows a client workstation to perform transparent file access over a network to a Windows system, or a UNIX system running an SMB server. Client file access calls are converted to CIFS protocol requests and are sent to the server over the network. The server receives the request, performs the actual filesystem operation, and sends a response back to the client.
The fs-cifs manager uses TCP/IP for its transport. Therefore, to use fs-cifs, you'll also need to run the TCP/IP client for the QNX Neutrino RTOS.