If a segment is lost, the window does not advance until the segment is retransmitted and the sender receives the acknowledgment for the segment. When the receiver gets a segment out of order, it can send an acknowledgment for the highest received data byte without sending individual acknowledgments for the intermediate data.

Animation 20.5 Item information Caption: If a segment is lost, the window does not advance until the segment is retransmitted and the sender receives the acknowledgment for the segment. When the receiver gets a segment out of order, it can send an acknowledgment for the highest received data byte without sending individual acknowledgments for the intermediate data. Animation: 20.5 Type: animation Item: Animation 20.5 without textual material Keywords: tcp, sliding window, flow control