追路由後面 Ping 值比前面的低? - V2EX
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rack

追路由後面 Ping 值比前面的低?

  •   
  •   rack Jul 17, 2015 2465 views
    This topic created in 3939 days ago, the information mentioned may be changed or developed.
    我Cohona追路由

    什後面的Ping值比前面低?
  • cohona
  • ping
  • 面的
    1 replies    2015-07-18 08:22:09 +08:00
    wy315700
        1
    wy315700  
       Jul 18, 2015
    这并不是用ping来测试的
    而是用icmp回显测试的

    比如你要知道第六跳的IP，就发送一个TTL=6的包，这样到了第六跳就会因为TTL=0被丢弃，同时返回一个ICMP不可达的包

    而返回一个ICMP不可达的包并不是强制的，
    所以这种测试结果并不科学
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