
Configuring IP Utilities
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304234-A Rev 00
NetBIOS Overview
The Network Basic Input/Output System (NetBIOS) is a session layer
communications service used by client and server applications in IBM token ring
and PC LAN networks.
NetBIOS provides applications with a programming interface for sharing services
and information across a variety of lower-layer network protocols, including IP.
Figure 2-7
shows the position of NetBIOS and IP in a simple network
architecture.
Figure 2-7. NetBIOS over IP
There are three categories of NetBIOS services: the name service, the session
service, and the datagram service.
The NetBIOS name service allows an application to:
• Verify that its own NetBIOS name is unique. The application issues an add
name query to NetBIOS. NetBIOS broadcasts the add name query, containing
the name. NetBIOS applications that receive the query return an add name
response or a name-in-conflict response. If no response to the query is
received after (typically) six broadcasts, the name is considered to be unique.
• Delete a NetBIOS name that the application no longer requires.
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