致谢 (Acknowledgements)
本文档的主要思想取自 [DNSRRR] 第 3 节, "Stopping Downward Cache Search on NXDOMAIN". 感谢其作者 Paul Vixie, Rodney Joffe, and Frederico Neves. 此外, Tony Finch, Ted Lemon, John Levine, Jinmei Tatuya, Bob Harold, and Duane Wessels 提供了宝贵的反馈和建议.
本文档的主要思想取自 [DNSRRR] 第 3 节, "Stopping Downward Cache Search on NXDOMAIN". 感谢其作者 Paul Vixie, Rodney Joffe, and Frederico Neves. 此外, Tony Finch, Ted Lemon, John Levine, Jinmei Tatuya, Bob Harold, and Duane Wessels 提供了宝贵的反馈和建议.