Three types of NetBIOS commands generate connectionless traffic:
These commands are sent as Unnumbered Information (UI) frames at the LLC sublayer.
To understand how Windows NT Server and Windows NT Workstation use retry and timeout values, consider what happens when the Windows NT-based computer running NBF registers its NetBIOS computer name. The Windows NT-based computer sends a multicast message containing an ADD_NAME_QUERY frame on to the network. Other computers on the network running NBF can retrieve and process the ADD_NAME_QUERY message. The multicast frames are sent a total of AddNameQueryRetries times at time intervals of AddNameQueryTimeout. This allows computers on the network enough time to inform the sending computer whether the name is already registered as a unique computer name or as a group name on the network.
Note
All Registry values discussed in this chapter are found under the following Registry path: