What is the nsdc?

Amazing nobody did… Biigest pitfall in naming convention is the 15 character limit for (Netbios) hostnames. And adding nsdc- takes 5 of them. So, the NethServer that will host nsdc, can have a max of 10 character hostname.
@davidep: since Netbios is very old protocol, couldn’t we do without it? Or are there still situations and/or applications that depend on Netbios name resolution?