Wed Oct 20 02:45:58 MDT 2010
A period character separates the name into a NetBIOS scope identifier
and the computer name. The NetBIOS scope identifier is an optional
string of characters that identify logical NetBIOS networks that run
on the same physical TCP/IP network. For NetBIOS to work between
computers, the computers must have the same NetBIOS scope identifier
and unique computer names.
More information about the samba