参数中 -l ping包大小最大65500，
ttl返回值 代表所ping的主机操作系统
128 代表win2000/xp/nt
255 unix
64 linux
32 win95
ttl返回值接近那个 说明主机操作系统类型 差值就是ping包经过的路由跳数 可用tracert验证
比如
C:/Documents and Settings/Administrator>ping www.163.com
Pinging www.cache.gslb.netease.com [121.195.178.235] with 32 bytes of data:
Reply from 121.195.178.235: bytes=32 time<1ms TTL=58
Reply from 121.195.178.235: bytes=32 time<1ms TTL=58
Reply from 121.195.178.235: bytes=32 time<1ms TTL=58
Reply from 121.195.178.235: bytes=32 time=1ms TTL=58
说明所ping操作系统为linux 64-58=6 路由经过了6跳 用tracert可以看到7条路径（ 首条是本机的网关）
C:/Documents and Settings/Administrator>tracert www.163.com
Tracing route to www.cache.gslb.netease.com [121.195.178.235]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 59.64.150.1
2 2 ms 1 ms 1 ms 10.1.1.1
3 <1 ms <1 ms <1 ms 10.0.11.1
4 <1 ms <1 ms <1 ms 10.0.28.5
5 <1 ms <1 ms <1 ms 202.112.42.5
6 1 ms 1 ms 1 ms 121.195.176.2
7 1 ms <1 ms <1 ms 121.195.178.235
Trace complete.