6.3.4 NetBIOS Broadcast and NBNS Background

If a server is in a domain whose NetBIOS name is d, it registers <d>[1C] records, and <d>[1B] records if it is a PDC, to the NBNS(WINS) server. A client can retrieve those records by either broadcasting or querying against NBNS(WINS) directly.

For more information, see [RFC1001] and [RFC1002].