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    Evidence of Decreasing Internet Entropy: The Lack of Redundancy in DNS Resolution by Major Websites and Services
    02 Mar 2018Working Paper Summaries

    Evidence of Decreasing Internet Entropy: The Lack of Redundancy in DNS Resolution by Major Websites and Services

    by Samantha Bates, John Bowers, Shane Greenstein, Jordi Weinstock, and Jonathan Zittrain
    Stabilizing the domain name resolution (DNS) infrastructure is critical to the operation of the internet. Single points of failure become more consequential as a larger proportion of the internet's biggest sites are managed by a small number of externally hosted DNS providers. Providers could encourage diversification by requiring domain owners to select a secondary DNS provider.
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    Author Abstract

    This paper analyzes the extent to which the internet's global domain name resolution (DNS) system has preserved its distributed resilience given the rise of cloud-based hosting and infrastructure. We explore trends in the concentration of the DNS space since at least 2011. In addition, we examine changes in domains' tendency to "diversify" their pool of nameservers-how frequently domains employ DNS management services from multiple providers rather than just one provider-a comparatively costless and therefore puzzlingly rare decision that could supply redundancy and resilience in the event of an attack or service outage affecting one provider

    Paper Information

    • Full Working Paper Text
    • Working Paper Publication Date: February 2018
    • HBS Working Paper Number: NBER Working Paper Series, No. 24317
    • Faculty Unit(s): Technology and Operations Management
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    Shane M. Greenstein
    Shane M. Greenstein
    Martin Marshall Professor of Business Administration
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