title: how a website is loaded in our browser
body: <p>When I type www.google.com at my browser address bar, what exactly happens technically and how entire stuff is loaded. Considering the same HTTP page is being loaded...</p>
  
  <p>what is role of DNS server, IP address, MAC address, subnet mask, proxy setting, default gateway in this case.</p>
  
  <p>Does it make any different if I am in different class of network?</p>