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Analysis of DNS cache effects on query distribution.

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This study analyzes Domain Name System (DNS) cache effects on query distribution in the CN top-level domain (TLD). Findings quantify cache impacts and infer Time-To-Live (TTL) distributions for domain names.

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Area of Science:

  • Computer Science
  • Network Engineering
  • Internet Infrastructure

Background:

  • Domain Name System (DNS) resolution is critical for internet functionality.
  • DNS caching significantly impacts query performance and traffic patterns.
  • Understanding cache effects is essential for optimizing internet services.

Purpose of the Study:

  • To investigate the impact of DNS caching on query distribution at the CN top-level domain (TLD) server.
  • To develop and present a model for DNS resolution, specifically focusing on caching mechanisms.
  • To quantify the presence and magnitude of DNS cache and cache-sharing effects on request distribution.

Main Methods:

  • Filtering malformed DNS queries to ensure data accuracy.
  • Developing an analytical model for DNS resolution and caching.
  • Employing simulation to demonstrate cache effects.
  • Analyzing CN TLD log data using the developed cache model.

Main Results:

  • Demonstrated the presence and magnitude of DNS cache effects on query distribution.
  • Quantified cache-sharing effects on request patterns.
  • Inferred the approximate Time-To-Live (TTL) distribution for domain names.
  • Provided analysis of CN TLD log data based on the cache model.

Conclusions:

  • DNS caching significantly influences query distribution at the TLD level.
  • Cache-sharing effects are quantifiable and impact request patterns.
  • The study provides insights into TTL distributions, aiding network optimization.