Telnet testing port workable

Install telnet tool on Windows;

telnet www.example.net 80

NetBIOS Over TCP/IP

The Windows 2000 implementation of NetBIOS over TCP/IP is referred to as NetBT . NetBT uses the following TCP and UDP ports:

UDP port 137 (name services)

UDP port 138 (datagram services)

TCP port 139 (session services)