A Windows computer registry may also be configured in such a way as to display "unknown" for the node type.
LanMan normally ran across Microsoft's basic, non-routable NetBIOS/NetBEUI NBF protocol, but Pathworks included a DECnet stack, including layers like the LAT transport used for terminal sessions.
Starting with the second versions of the Professional Write, Professional File and Professional Plan trio, a separately-purchased Professional series networking add-on (available in 5-user, 10-user and larger packs) could be obtained so that they could all function in a multi-user local area networking (LAN) environment utilizing rudimentary file locking (but not record locking) via NetBIOS on such as Novell's NetWare, or Banyan VINES.
Notable Wollongong technical staff that worked on these projects include David H. Crocker (Email), Dr. Marshall Rose (SNMP), Karl Auerbach (Netbios, SNMP), Narayan Mohanram (TCP/IP on UNIX), Jerry Scott (TCP/IP on VMS), Leo McLaughlin III and John Bartas (TCP/IP on IBM PC).
Many Internet service providers currently block access to these NetBIOS ports over the Internet, helping to prevent spamming even for older unfirewalled clients.