TCP window full

When a TCP window is full, it means that the receiving host's buffer where it stores incoming data has reached its maximum capacity. This can occur when the sender is sending data too quickly, overwhelming the receiver's ability to process and store it. When the receiver's buffer is full, it sends an acknowledgment message to the sender indicating that it cannot receive any more data until some of the currently stored data is processed and cleared from the buffer. Once space in the buffer becomes available, the receiver sends another message to the sender indicating that it can resume sending data. This process is called flow control and helps to ensure that data is transmitted efficiently and effectively between hosts on a network.