Evolution and challenges of DNS-based CDNs

• 来源期刊: 数字通信与网络（英文）
• 年，卷（期）: 2018,（4）
• 页码范围: 235-243
• 页数: 9页
• 语种: 中文

摘要

DNS-based server redirecting is considered the most popular means of deploying CDNs.However,with the increasing use of remote DNS,DNS-based CDNs face a great challenge in performance degradation.To address this issue,encouraging progress has been made in both industry and research communities.In this article,state-of-art solutions for the remote DNS problem are discussed at first.Next,privacy concerns about DNS-based CDNs,including client location as well as redirection privacy,are identified and a representative solution is summarized.Finally,the solution is compared to those in prior works under different measures,and a discussion on DNS-based CDN applications is provided.A model is also established to deepen the understanding of CDN performance.We believe that this survey will shed light on the application of DNS-based CDNs,and it is expected to provide design guidelines to CDN service providers.