Chapter 13. Transmission Control Protocol (TCP) Retransmission and Time-Out

The reliable service of TCP requires that all segments containing data be acknowledged by the receiver. When an acknowledgment (ACK) for a segment is not received, the sender must retransmit the segment. The method by which the sender detects that a segment was not received can have a direct impact on performance. This chapter describes how TCP measures the expected time within which to receive an ACK and how it detects and recovers from lost segments.

Retransmission Time-Out and Round-Trip Time

For each connection, TCP maintains a ...

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