title: what is the need for multiple applications running on same port iis
body: <p>Recently I found that in IIS we can create 2 or more sites with same port number with a different host header.</p>
  
  <p>But I couldn't understand what is the need for this? In which scenarios is this useful?</p>
  
  <p>Please point me in the direction which can help my understanding?</p>
  
  <p>How does this work when machines are associated with load balancer?</p>