Server Message Block (SMB)
Server Message Block (SMB) is an application and presentation layer protocol that provides a mechanism to access shared network resources such as files or printers on network servers. SMB is the default file access method used on Windows networks. Today, SMB is more commonly referred to as the Common Internet File System (CIFS), though the functionality remains the same. On a network that uses Windows servers and clients, administrators access the functionality of SMB through Windows Explorer and the command line NET utility.