联通, ttl 一直在变。。。
PING 114.114.114.114 (114.114.114.114): 56 data bytes
64 bytes from 114.114.114.114: seq=0 ttl=85 time=16.841 ms
64 bytes from 114.114.114.114: seq=1 ttl=86 time=16.696 ms
64 bytes from 114.114.114.114: seq=2 ttl=87 time=16.824 ms
64 bytes from 114.114.114.114: seq=3 ttl=76 time=16.724 ms
64 bytes from 114.114.114.114: seq=4 ttl=77 time=16.687 ms
64 bytes from 114.114.114.114: seq=5 ttl=78 time=16.577 ms
64 bytes from 114.114.114.114: seq=6 ttl=88 time=16.843 ms
64 bytes from 114.114.114.114: seq=7 ttl=83 time=16.765 ms
64 bytes from 114.114.114.114: seq=8 ttl=90 time=16.848 ms
64 bytes from 114.114.114.114: seq=9 ttl=78 time=17.272 ms
64 bytes from 114.114.114.114: seq=10 ttl=92 time=16.635 ms