24 June 2014 at 1:52pm
When providing DNS nameserver services a degree of redundancy is needed. In most cases the DNS records for a particular domain will be hosted by at least two nameservers, but is that enough by itself? When building a resilient system the risks involved with the failure modes of the system need to be considered and weighed up against the associated costs and overheads. As a common example - does having both DNS servers on the same local network segment provide you with protection against network failure? Probably not.
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