Question

19:25:47.629351 IP 2.2.2.2.80 > 1.1.1.1.31889: Flags [.], seq 2372487272:2372492544, ack 2808407165, win 122, options [nop,nop,TS val 911640439 ecr 235835291], length 5272
19:25:47.631626 IP 1.1.1.1.31889 > 2.2.2.2.80: Flags [.], ack 2372480682, win 3876, options [nop,nop,TS val 235835291 ecr 911640428], length 0
19:25:47.631638 IP 1.1.1.1.31889 > 2.2.2.2.80: Flags [.], ack 2372483318, win 3793, options [nop,nop,TS val 235835291 ecr 911640428], length 0
19:25:47.631677 IP 1.1.1.1.31889 > 2.2.2.2.80: Flags [.], ack 2372483318, win 4096, options [nop,nop,TS val 235835292 ecr 911640428], length 0
19:25:47.674712 IP 1.1.1.1.31889 > 2.2.2.2.80: Flags [.], ack 2372485954, win 4054, options [nop,nop,TS val 235835335 ecr 911640428], length 0

tcpdump输出中选项中ecr的含义是什么？我谷歌但却失败了。

谢谢！

Answer 1

ECR - Echo回复---与确认字段一起发送。它是根据同步数据包中发送的TSval计算的时间戳值...

什么是tcpdump ecr选项值的含义？

1 个答案: