NetBIOS

NetBIOS is an acronym for Network Basic Input/Output System. Source

Microsoft developed NetBIOS/NetBEUI

NetBEUI
NetBIOS Extended User Interface
  • supported logical addressing like IP addresses. Each system remembered the NetBIOS name and MAC address.
  • used broadcasts to determine names of devices.
  • microsoft developed NetBIOS over TCP/IP and got rid of NetBEUI to handle more modern networking.
  • protocol: tcp, uDP
  • TCP Ports: 137, 139
  • UDP ports: 137, 138