The Host Name

The host name for the client can be any combination of the letters A through Z, the numerals 0 through 9, and the hyphen (-). By default, in Microsoft networking environments, this value is the NetBIOS computer name, but you can assign a different host name without affecting the NetBIOS computer operation if desired. If WINS Lookup is used with Microsoft DNS, this value should match your NetBIOS computer name for consistency.

Some characters that can be used in NetBIOS names, especially the underscore and period, cannot be used in DNS host names.