Berkeley description: The requested name is valid, but
does not have an Internet IP address at the name server. This is not a
temporary error. This means another type of request to the name server
will result in an answer.
WinSock description: Same as Berkeley for host
resolution. For protocol and services resolution, the name or number was
not found in the respective database.
User suggestions: see WSAHOST_NOT_FOUND for details.