The solution is to send more data at a time. As the bandwidth of the networkincreases, more data can fit into the pipe (network), and as the pipe getslonger, it takes longer to acknowledge the receipt of the data. Thisrelationship is known as the bandwidth-delay product (BDP). This is calculatedas the bandwidth multiplied by the round-trip time (RTT), resulting in a valuethat specifies the optimal number of bits to send in order to fill the pipe. Theformula is this: