last-ack
![last-ack](https://linux.systemv.pe.kr/wp-content/uploads/2015/03/last-ack.png)
If the remote end stays in LAST-ACK state because the last ACK was lost, opening a new connection with the same quadruplet will not work.
If the remote end stays in LAST-ACK state because the last ACK was lost, opening a new connection with the same quadruplet will not work.