Investigation and Estimation of Fast Retransmission Method for Reliable Data Transmission in TCP

The transmission control protocol TCP is the protocol that is responsible for the reliable data transmission in the TCP/IP standard. Therefore, it has to recover the packets lost via data propagation and retransmit these packets after three duplicate acknowledge. Wait for three duplicate acknowledge could increase the total delay in the network. This work aims to investigate shorter retransmission time. It was proposed that two duplicate acknowledge and the NS2 program was used to simulate the transmission process in the network, taking into account all the factors that affect the transmission. From this project, it has been found that retransmitted lost packets by least time happen when just two duplicate acknowledges were used, and this time rises up when three duplicate acknowledges were used.