TCP error recovery mechanism exactly is what kind of? There are fast retransmission mechanism, the book says TCP received three times in the same package when don't have to wait for an ack can overtime retransmission the package, the back and he said also adopted the SR protocol TCP, the SR protocol which message segment is returned the corresponding ack is not received? It is not to say the conflict? Still say this is two different versions of the TCP protocol? It is now the most common TCP USES the error recovery mechanism is what kind of?

CodePudding user response:

Sr is to choose the retransmission, TCP is also a similar mechanism, the receiver if didn't receive a serial number of the packet, it will send an ack packet retransmission, when, after receipt of the package will package on the missing piece