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Evolution and Challenges of DNS-Based CDNs



Zheng Wang, Scott W. Rose


DNS-based server redirecting has been realized as the most popular way to deploy CDNs. However, with the increasing use of remote DNS, DNS-based CDNs faces a great challenge in performance degradation. To address this challenging issue, encouraging progress has been made from both industry and research communities. In this article, the state-of-art solutions for the remote DNS problem are discussed at first. Next, the privacy concerns about DNS-based CDN, including client location as well as redirection privacy, are identified and a representative solution is summarized. At last, comparisons for prior work under the different measures are conducted. We believe that this survey will shed lights on the application of DNS-based CDNs and it is expected to provide design guidelines to the CDN service providers.
Digital Communications and Networks


DNS, CDN, Content Delivery Networks, DNS privacy


Wang, Z. and Rose, S. (2018), Evolution and Challenges of DNS-Based CDNs, Digital Communications and Networks, [online], (Accessed July 22, 2024)


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Created October 31, 2018, Updated October 12, 2021