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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!

Celebi
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    Did you Google "Google Public DNS latency"? See https://developers.google.com/speed/public-dns/docs/performance and in particular https://developers.google.com/speed/public-dns/docs/performance#geography – Daan Apr 24 '12 at 08:21
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    this is not programming related. – Alnitak Apr 24 '12 at 16:04
  • Maybe https://networkengineering.stackexchange.com/ would be a better fit? Although the tags make it seem like it would be on topic here as well. – SkySpiral7 May 18 '20 at 00:00

1 Answers1

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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.

Sandman4
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