LTCP is a simple layering technique for the congestion window response of TCP to make it more scalable in highspeed, high RTT networks. LTCP is a two dimensional congestion control framework - the macroscopic control uses the concept of layering to quickly and efficiently make use of available bandwidth whereas microscopic behaviour extends the existing AIMD algorithms of TCP to determine the per-ack behaviour. If congestion is not observed over a period of time, the number of layers is increased. When a flow operates at a higher layer, it increases its congestion window faster than when operating at a lower layer. LTCP flows have shown efficient bandwidth utilization with excellent fairness properties, low convergence time and RTT unfairness similar to normal TCP. Below figure shows the evolution of congestion window of LTCP as compared to TCP. The result is obtained from simulations on 'ns-2' network simulator.