A.Win98：winipcfg
B.Win2000以上：Ipconfig/all
C.NSLOOKUP：如查看河北的DNS
C:\>nslookup
Default Server: ns.hesjptt.net.cn
Address: 202.99.160.68
>server 202.99.41.2 则将DNS改为了41.2
> pop.pcpop.com
Server: ns.hesjptt.net.cn
Address: 202.99.160.68
Non-authoritative answer:
Name: pop.pcpop.com
Address: 202.99.160.212