The initial congestion window size (cwnd) is a key component of TCP slow start, also known as the exponential growth phase. Using standard TCP, a period of three RTT is required for an average HTTP web load during slow start, which can happen after a packet loss. The majority of web transactions are on the small side, under 16 kbytes. The transactions are very short and complete before a slow start gets a chance to ramp up. To make full use of the significant bandwidth offered in mobile networks, AA TCPO sets the initial size of the cwnd, by default, high enough to allow small web transactions to take place within one RTT period. AA TCPO also offers the operator the ability to configure the initial cwnd size as part of the AA TCPO configuration policy.