当我在 linux 上使用 ping 命令时
我得到以下输出:
ping google.com
PING google.com (216.58.205.206) 56(84) bytes of data.
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=2 ttl=128 time=490 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=3 ttl=128 time=1209 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=4 ttl=128 time=702 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=5 ttl=128 time=112 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=6 ttl=128 time=320 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=7 ttl=128 time=137 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=8 ttl=128 time=145 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=9 ttl=128 time=281 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=10 ttl=128 time=138 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=11 ttl=128 time=298 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=12 ttl=128 time=194 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=13 ttl=128 time=395 ms
64 bytes from mil04s29-in-f14.1e100.net (216.58.205.206): icmp_seq=14 ttl=128 time=124 ms
所以第一行它说大小是56字节(这是icmp数据的大小对吗?)+ 8(icmp头)+ 20(ipv4头)= 84字节,这是每个发送数据包的大小对吗?
下一行没有,它说 64 字节(数据 + icmp 标头),为什么重播时是 64 字节,为什么不是 84 字节?!
在最后一行
14 packets transmitted, 13 received, 7% packet loss, time 13607ms
时间是什么 ?以及如何计算?
问候
man
您可以使用该命令获取软件包的手册页(“手册”) 。如果您
man ping
在终端中运行,您将获得该ping
实用程序的详细说明以及如何使用它的说明。在手册页中,有以下条目:
哦,时间以毫秒 (ms) 为单位计算