SMB, refers to a network protocol entitled Server Message Block. It's mainly applied to share files, printers, serial ports, and miscellaneous communications between nodes on a network.
SMB works through a client-server approach, where a client makes specific requests and and the network server responds accordingly.
The SMB servers make their file systems and other resources available to clients on the network. Client computers may have their own hard disks, which are not publically shared, yet also want access to the shared file systems and printers on the server.
Clients connect to servers using NetBIOS via TCP/IP.
