title: Why Google public DNS(8.8.8.8)'s ping latency so low?
body: <p>I use <a href="http://just-ping.com">just-ping</a> to ping Google public DNS server, which IP is 8.8.8.8. 
  <a href="http://just-ping.com">just-ping</a> can ping a host from 50 locations worldwide.</p>
  
  <p>I found that DNS's latency is low around the world. Many cities are far from each other, but they got the same low latency in ping (about 5ms).</p>
  
  <p>I suppose the IP 8.8.8.8 is directed to one host. How that host reacts so fast even it is faraway from its clients?</p>
  
  <p>Thanks!</p>