Stability Of Tcp/ip Protocols

Abstract

The internet is emerging to be the basic need of our times impacting our social lives, the way companies do business, the education sector and even government. There has hence been a huge almost exponential rise in the number of internet users in recent times. In this journey, the internet has also evolved from a simple research project at the Defense Advanced Research Projects Agency (DARPA) to a global interconnected network on which most critical aspects of our lives depend on. This increase and dependency on the internet has resulted in a form of congestion collapse where service providing servers are unable to service their workload and users are competing for available bandwidth. The basic idea of this work is to simulate TCP Reno using NS2 at different delay times and window size, to find out its stability. The result is that TCP-Reno is not a scalable protocol, i.e., its stability is compromised if either the RTT of the users is large or if the available capacity per user at the router is large. This leaves room for research into techniques aimed at improving TCP’s Congestion Control algorithms’ abilities.