https://www2.cs.duke.edu/courses/fall16/compsci356/DNS/DNS-primer.pdf
来源:oschina
链接:https://my.oschina.net/u/4710279/blog/4947189
https://www2.cs.duke.edu/courses/fall16/compsci356/DNS/DNS-primer.pdf
来源:oschina
链接:https://my.oschina.net/u/4710279/blog/4947189