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by error503
1213 days ago
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In addition to GeoDNS as explained by my sibling post, this can be achieved not by making the domain point to different IP addresses, but by placing multiple instances of the same IP address in different points in the network (Anycast), and which one you hit is determined by routing policy. Some CDNs 'prefer' one approach or the other, e.g. Akamai tends to use DNS, CloudFlare tends to use Anycast, but these days most have the capability to do both or mix them as appropriate. |
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