title: getaddrinfo with flag AI_NUMERICHOST
body: <p>Please tell me something I can't understand. There is a function <code>getaddrinfo()</code> and there is a flag <code>AI_NUMERICHOST</code>. MSDN says that in <code>getaddrinfo()</code> with this flag, you need to send the numeric value of the IP address, and not the domain name. But why?</p>
  <p>I already have an IP address, why should I ask DNS for an IP address?</p>