域名解析实验

1.　　研究nslookup命令的用法，并通过该命令获得常用的著名网络服务器的ip地址。

2.　　编写程序，从命令行读入任意域名，解析出相关的ip指针和别名等，并和上面的结果进行比较。

-DNS Experiment 1. Study the use of the nslookup command, and the command to get the famous network server ip address. Program from the command line reads any domain name, parse out the ip pointer and alias, and compare the results of the above.