title: Analysis of DNS cache effects on query distribution.
abstract: This paper studies the DNS cache effects that occur on query distribution at the CN top-level domain (TLD) server. We first filter out the malformed DNS queries to purify the log data pollution according to six categories. A model for DNS resolution, more specifically DNS caching, is presented. We demonstrate the presence and magnitude of DNS cache effects and the cache sharing effects on the request distribution through analytic model and simulation. CN TLD log data results are provided and analyzed based on the cache model. The approximate TTL distribution for domain name is inferred quantificationally.
authors.affiliation: Computer Network Information Center, Chinese Academy of Sciences, No. 4 South 4th Street, Zhongguancun, Beijing 100190, China ; China Organizational Name Administration Center, Jia 31, North Guangximen, Xibahe, Beijing 100028, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang