👉 TCP fluid is a mechanism used in TCP (Transmission Control Protocol) to dynamically adjust the congestion control window size based on network conditions, enhancing network efficiency and stability. When a TCP connection is established, the initial congestion window (cwnd) is set to a default value. As the connection progresses and network conditions change, TCP fluid allows the application layer to communicate with the transport layer to adjust this window size in real-time. This is achieved through specific TCP headers, such as the TCP_Fluid header, which carries information about the current fluid size and its expected changes. By adapting the congestion window in response to actual network throughput, TCP fluid helps prevent congestion and improves overall performance, especially in fluctuating network environments.
