4.利用ping命令（-n參數）了解網絡健康狀況

“-n count”參數用于定義測試所發出的測試數據包的個數，其默認值為4。通過這個命令可以自定義發送測試ICMP數據包的個數，這對衡量網絡質量是很有幫助的。

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

這是向IP地址為192.168.1.188的計算機發送10個ICMP測試數據包，發送10個，返回10個，最大延時和最小延時均為0，丟包率為0。