Common Internet File System (CIFS) is a file-sharing protocol that provides an open and cross-platform mechanism for requesting network server files and services.
CIFS is typically used in workstation and server OSs and was a native file-sharing protocol in Windows 2000.
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CIFS is also used in embedded and appliance systems.
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Recent storage products, like Storage Area Network (SAN) and Network Access Server (NAS), are based on CIFS.