A NetBIOS name resolution method in which broadcast messages are used for name registration and resolution. B-node is one of the NetBIOS name resolutions supported by Microsoft Windows NT and Windows 2000.
Name resolution is the process of converting the name of a host on the network into a network address (such as an IP address). Name resolution must be performed in order to establish communication over a network in Windows. B-node is one of four basic methods supported by Windows for resolving NetBIOS host names—that is, computer names—into IP addresses.
If a computer running Windows is configured as a B-node machine, it always uses broadcasts to resolve names of other hosts on the network. For example, if a B-node machine wants to communicate with another machine with the NetBIOS name SERVER7 (for example, if it wants to connect to a shared resource on SERVER7), the B-node machine broadcasts a packet containing a NetBIOS name query request. If SERVER7 receives the packet, it responds by returning a frame containing its IP address. If SERVER7 is off line or fails to return a response, the B-node client will be unable to establish a connection with SERVER7.
As a name resolution method, B-node is flawed in two ways:
A better approach to NetBIOS name resolution on Windows networks is to configure clients as H-node machines and use a WINS server. H-node is a NetBIOS name resolution method that combines B-node and P-node.