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As for the lack of enterprise DNS resiliency, consider this analogy. Most IT professionals would never
consider building a data center without backup power or redundant telecom or Internet connections.
Further, most know that redundant connectivity isn’t truly redundant unless there is diversity of physical
cable routes and facilities. But too many are just using a single DNS service. If that DNS “power” gets
cut, it doesn’t matter how much you spend on your CDN, your regional cloud hosting, etc. Your brand will
be offline and you’ll be scrambling.

DNS is still a bit of a “dark art” that many IT practitioners and leaders pay little attention to, not
understanding that its performance and security can significantly impact digital experience.

In many cases, it’s simply a lack of awareness of best practice. Companies often think that they’re resilient
because they have more that one nameserver, when in fact they are not. True DNS resilience means
that your authoritative DNS records are served from diverse networks, facilities and routed prefixes. It’s
certainly possible to do this on your own. But it’s typically easier (and less costly) to outsource your
authoritative DNS to one or more third party service, which can often offer better performance and
scalability across a broader geographic scope.

About the Author
Angelique Medina, Senior Product Marketing Manager,
ThousandEyes.Angelique has worked in technical marketing
roles related to network infrastructure and network visibility for
the past ten years, most recently at ThousandEyes, where
she works on multi-layer visibility spanning application, DNS,
L3, and BGP. Prior to joining ThousandEyes, she spent time
working on data center networking at Big Switch Networks
and visibility switching at VSS Monitoring. She holds a BA in
English from the University of California, Berkeley. You can
follow her on Twitter @bitprints. Angelique can be reached
online at (https://twitter.com/bitprints ) and at our company
website http://www.thousandeyes.com/

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