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> Why would DNS have "optimized, localized results"? Any content that is CDN-based (which is most content) dynamically responds to DNS queries based on network

> Why would DNS have "optimized, localized results"? Any content that is CDN-based (which is most content) dynamically responds to DNS queries based on network and geographic location - to support CDN localization. In this way, Akamai for example knows the end user is in Boston on a Comcast network and will send the recursive DNS server a dynamic response that points to a directly-connected local-to-Boston content server.

nfoz 6y ago
oh, I didn't know that. thanks!!
Eikon 6y ago
Any serious CDN is doing that with anycast, not with geodns which has tons of drawbacks.
- etrabroline 6y ago
  You're right. This is really cool tech. https://www.cloudflare.com/learning/cdn/glossary/anycast-network/ https://www.cloudflare.com/learning/cdn/glossary/anycast-net...
- virtuallynathan 6y ago
  That's not the case - many use hybrid approaches, and GeoDNS is still used heavily in the industry. Anycast sucks too.