102878 - Information on Browser Operation: "SUMMARY
The Computer Browser service lets you track servers that are active on the network with a minimum of network overhead. It consists of two components on a Windows NT or Windows NT Advanced Server computer.
The User Mode component is the Browser, which is part of the LAN Manager Server service. This portion is responsible for maintaining the browse list, remoting the NetServerEnum API, and managing the computer's role as a Browser (or non-Browser).
The Kernel Mode component is the Datagram Receiver and is in charge of receiving and managing datagrams. "