怎样确定两台电脑确实连上了

举例说明，电脑1的IP地址是168.192.0.1 电脑2的IP地址是168.192.0.2
为了测试是否连接，使用Ping命令测试。
使用方法：在电脑1上，单击开始菜单，单击运行命令，在弹出的对话框中输入"cmd"，在命令提示符状态下输入ping 168.192.0.2，
屏幕显示

C:\Documents and Settings\Administrator>ping 168.192.0.2

Pinging 168.192.0.2 with 32 bytes of data:

Reply from 168.192.0.2: bytes=32 time<1ms TTL=128
Reply from 168.192.0.2: bytes=32 time<1ms TTL=128
Reply from 168.192.0.2: bytes=32 time<1ms TTL=128
Reply from 168.192.0.2: bytes=32 time<1ms TTL=128

Ping statistics for 127.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
则说明连接正常。
如果显示
C:\Documents and Settings\Ray>ping 192.168.0.2

Pinging 192.168.0.2 with 32 bytes of data:

Request timed out.
Request timed out.
Request timed out.
Request timed out.
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