4.利用ping命令（-n参数）了解网络健康状况

“-n count”参数用于定义测试所发出的测试数据包的个数，其默认值为4。通过这个命令可以自定义发送测试ICMP数据包的个数，这对衡量网络质量是很有帮助的。

例如：

            C:\WINDOWS>ping -n 10 192.168.1.188
            ping ing 192.168.1.188 with 32 bytes of data:
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            Reply from 192.168.1.188: bytes=32 time<10ms TTL=64
            ping statistics for 192.168.1.188:
            Packets: Sent = 10，Received = 10，Lost = 0 (0% loss)
            Approximate round trip times in milli-seconds:
            Minimum = 0ms，Maximum = 0ms，Average = 0ms

这是向IP地址为192.168.1.188的计算机发送10个ICMP测试数据包，发送10个，返回10个，最大延时和最小延时均为0，丢包率为0。