This is done by assigning a sequence number to each segment being transmitted on the network and receiving a positive acknowledgment (ACK) on successful delivery. By using of sequence numbers, the receiver ends arrange segments in correct sequence, that may be received out of order and to avoid duplicate packets.

In TCP, Damage is handled by adding a checksum to each segment which is being transferred, finally the checking is done at the receiver, and the damaged segments are then finally discarded. Flow control- TCP provides a mechanism that helps the receiver to control the amount of data sent by the sender.

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