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by citrin_ru
1794 days ago
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It is relatively easy to make DNS highly redundant: just put multiple DNS server in data-centers which are as independent as possible (different geo locations, different ISPs). You can also use different DNS software and different OS (say BSD+Linix) to exclude correlated bugs. Root DNS server AFAIK use different software for this reason. Problems starts when you want to easy make frequent changes and introduce complex software to manage DNS zones (and complexity usually comes with bugs). |
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