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by bhauer
3533 days ago
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FWIW, since the comment was a reply to my message above: It provided value by answering my question concerning serious downsides to providing optional post-TTL last-known-good caching within a DNS resolver. The answer is implicit in that a major DNS resolver provides exactly this functionality. |
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A little more information, considering it is public. (I had to double check if it was)
https://www.google.com/patents/US8583801