Abstract. The aim of this paper is to determine the performance enhancement of the network
for eliminating congestion through the use of the benefits of algorithms. These algorithms can
be used in hindering the congestion which may occur within the network that relies on a
Transmission Control Protocol (TCP) protocol. This paper specifically focuses on
demonstrating the function of TCP, and most especially the four (slow start, congestion
avoidance, fast retransmit and fast recovery algorithms) that are applied in the control of
congestion. In the study, the varying effects of connection link from PPP DS1 to PPP DS3 on
the network’s performance are investigated.