Name Service NetBIOS resources are referenced by name. Lower level addresses are not available to NetBIOS applications. An application representing a resource registers one or more names that it wishes to use. The name space is flat and not hierarchically organized. It uses 16 alphanumeric characters.
Registration implies bidding for use of a name.
Each application contends with other applications in real time. No two applications on the NetBIOS network may use a unique name until the originating application requests that their name be deleted or the host is powered off or reset. The three primitive operations provided by Name Service are Add Name , Add Group Name , and Delete Name . Session Service A session is a full-duplex, sequenced, and reliable message exchange conducted between a pair of NetBIOS applications. Data is organized into messages.