在下面的netstat输出中bad segments received坏的部分是什么构成了一个坏的部分？ 我会认为一个TCP头的校验和可以做到这一点，但还有其他的东西吗？ 如果段超时后到达？ 或者如果重复的部分到达？
$ netstat -s <snip...> Tcp: 183975 active connections openings 110830 passive connection openings 5140 failed connection attempts 2649 connection resets received 19 connections established 18272496 segments received 18712556 segments send out 25163 segments retransmited 824 bad segments received. 9557 resets sent <snip...>