域名相关知识

DNS学习:

https://www.ze3kr.com/2016/12/domain-name-system/

http://blog.csdn.net/yipiankongbai/article/details/25031461

http://blog.csdn.net/yxwmzouzou/article/details/46643609

 http://blog.csdn.net/yipiankongbai/article/details/25031461   

IP地址学习：

http://blog.csdn.net/u013018721/article/details/38332703

http://www.cnblogs.com/JuneWang/p/3917697.html