Why Google public DNS(8.8.8.8)'s ping latency so low?

Question

I use just-ping to ping Google public DNS server, which IP is 8.8.8.8. just-ping can ping a host from 50 locations worldwide.

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).

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?

Thanks!

Solution

8.8.8.8 is not one host. Instead it's an anycast address which routed to the nearest host out of many locations around the world.