TCP:可靠数据传输 event: data received from application above 简化的发送方,假设 create, send segment 单向数据传输 无流量,拥塞控制 wait event: timer timeout for fc segment with seq# y or event retransmit segment event: AcK received with ACK #y ACK processing 主讲人:西安交通大学程向前 第4讲传输层之二45主讲人：西安交通大学 程向前 第4讲 传输层之二 4-5 TCP: 可靠数据传输 简化的发送方, 假设 wait for event wait for event event: data received from application above event: timer timeout for segment with seq # y event: ACK received, with ACK # y create, send segment retransmit segment ACK processing •单向数据传输 •无流量, 拥塞控制