Wired and Wireless networks are two types of challenging environment for TCP congestion control. Most of the congestion control algorithms have been proposed to improve the performance of TCPs in these two environments. Although these improved algorithm can improve network utilization, and perform excellently over disparate networks that contain both wired and wireless residue a good performance. In this study, the Enhanced Slow-Start algorithm, which can concentrate for avoiding heavy packet loss and improved network utilization for keeping a Congestion Window (CWND) increment/decrement manner, and perform very well while controlling packet loss with the standard TCP Reno algorithm. A series of experimental results to demonstrate the performance of Enhanced Slow-Start compared with other state-of-the-art algorithms. The performance of the proposed algorithm is proved to better when compared to the standard Slow-Start, Agile-SD, Reno, Vegas, Hybrid Congestion control Algorithms. The parameters used for testing are CWND size, packet delivery ratio, RTT value, Packet drop.