请问能否教我一个测试自己电脑和互联网连接是否正常的办法吗?

开始-运行-cmd
随便ping一个网站看有无回应
如：
ping baidu.com
看反映速度多少，有无数据丢失

C:\Documents and Settings\Administrator>ping baidu.com

Pinging baidu.com [202.108.22.46] with 32 bytes of data:

Reply from 202.108.22.46: bytes=32 time=229ms TTL=53
Reply from 202.108.22.46: bytes=32 time=227ms TTL=53
Reply from 202.108.22.46: bytes=32 time=228ms TTL=53
Reply from 202.108.22.46: bytes=32 time=229ms TTL=53

Ping statistics for 202.108.22.46:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 227ms, Maximum = 229ms, Average = 228ms

ping一下本地的nds 看延迟