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RFC TCP\r\n\r\nReliability:\r\n The TCP must recover from data that is damaged, lost, duplicated, or\r\n delivered out of order by the internet communication system. This\r\n is achieved by assigning a sequence number to each octet\r\n transmitted, and requiring a positive acknowledgment (ACK) from the\r\n receiving TCP. If the ACK is not received within a timeout\r\n interval, the data is retransmitted. At the receiver, the sequence\r\n numbers are used to correctly order segments that may be received\r\n out of order and to eliminate duplicates. Damage is handled by\r\n adding a checksum to each segment transmitted, checking it at the\r\n receiver, and discarding damaged segments.\r\n\r\n是否有问题? |
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