The article explains TCP's retransmission mechanisms (timeout and fast retransmit), selective acknowledgment (SACK), sliding window and MSS limits, packet sticking causes and solutions, as well as flow control and congestion control techniques including slow start, congestion avoidance, and fast recovery.
In the digital age, TCP's retransmission mechanisms ensure reliable data delivery by handling packet loss through timeout, fast retransmission, SACK, and D‑SACK, while adaptive RTO calculations and optimization strategies keep network performance stable across varied conditions.
Understanding TCP's Selective Acknowledgment (SACK), Delayed ACK, and Round‑Trip Time (RTT) mechanisms is essential for performance and fault testing, as they improve retransmission efficiency, balance latency and bandwidth, and influence timeout calculations, enabling engineers to design precise test scenarios and optimize network reliability.
This article explains TCP's retransmission mechanisms—including timeout retransmission, fast retransmit, SACK and D‑SACK—along with sliding window operation, window sizing, and congestion control algorithms such as slow start, congestion avoidance, and fast recovery, providing a comprehensive network fundamentals guide.
