1.最基本，最常用的，测试物理网络的
ping 192.168.0.8 －t ，参数－t是等待用户去中断测试

2.查看DNS、IP、Mac等
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

更多见http://www.eefocus.com/myspace/blog/show.php?id=1194

有些有点用。