计算机网络作业六

Assignment 6: what' s your name

1. Find as many DNS server as possible (at least 10,000), provide a list of their IP and network delay, draw a global map that reflects their distributions (categorize them as recursive, auth, tld, and root), using modern tools such as echarts, d3, ...

2. Query them for famous sites such as amazon, aws, google, Baidu, tiktok, ... analyze their responses and tell us your findings, how do they distribute geographically? do they share similar IP?

3. Try find ip ranges for famous CDNs, in a global view.

4. Try find server IP that server HNU students for at least 10 famous sites, how many of them have local servers and how many of them not.

1.找到尽可能多的DNS服务器（至少10,000个），提供它们的IP和网络延 迟的列表，绘制一张反映它们分布的全球地图（将它们分类为递归、授权、顶级域和根），使用现代工具如echarts、d3等。

2.查询它们对于著名网站如亚马逊、AWS、谷歌、百度、抖音等的响应，分析它们的回应并告诉我们你的发现，它们在地理上如何分布？它们是否共享相 似的IP？

3.尝试找到著名CDNs的IP范围，从全球视角看。

4.尝试找到为HNU的学生服务的至少10个著名网站的服务器IP，它们中有多少个有本地服务器，有多少个没有。