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3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS Connected: An Internet Encyclopedia
3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS

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3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS

3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS

To minimize the impact on the TCP protocol, the selective acknowledgment extension uses the form of two new TCP options. The first is an enabling option, "SACK-permitted", that may be sent in a SYN segment to indicate that the the SACK option may be used once the connection is established. The other is the SACK option itself, which may be sent over an established connection once permission has been given by SACK-permitted.

The SACK option is to be included in a segment sent from a TCP that is receiving data to the TCP that is sending that data; we will refer to these TCP's as the data receiver and the data sender, respectively. We will consider a particular simplex data flow; any data flowing in the reverse direction over the same connection can be treated independently.


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Connected: An Internet Encyclopedia
3. TCP SELECTIVE ACKNOWLEDGMENT OPTIONS

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