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SMB/CIFS: Windows File Sharing

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SMB: the protocol behind Windows file sharing

SMB (Server Message Block) is Microsoft's protocol for file and printer sharing. When you map a network drive or access \\server\share, you're using SMB. It runs over TCP port 445 and supports authentication, file locking, and oplock-based client-side caching.

Samba implements SMB on Linux/macOS, making cross-platform file sharing possible.

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