4 ms·

Buffer bugs can and will happen. Packets can and will be queued in multiple outgoing interfaces. Dumb shit happens in network kit. Also, the new SDN stuff se

• hinkley 4y ago
  In TCP in particular there can be a lot of duplication due to missed packets or packets that arrive just a little too late. On noisy wifi you're transferring data, and the destination finally gets enough packets to send an ACK for the sliding window, only the source never gets the ACK, so it sends the packets it thinks you want but already have. Some of those get through, and the destination realizes it needs to send the ACK again because clearly you didn't get it the first time. Finally you resync and start getting new data, until the next cup of coffee goes into the microwave and it all repeats again. Since many UDP protocols end up re-implementing half of TCP, you're going to have some of the same failure modes.