Optimal TCP and Queuing Discipline for Web Proxy Servers

Abstract

Web proxies are a fundamental component in networks. They are used to cache and accelerate Web access and to save the bandwidth and traffic volume across the Internet. The performance of Web proxies is proven to be very vital and crucial in determining the overall usage and throughput of the Internet links. This paper investigates the effect of TCP various implementations and queuing disciplines for different loads on Web proxy servers through simulation using ns-2 simulator. The evaluated TCP models are Tahoe (referred to as TCP), Reno, New Reno, Vegas, and Sack. The evaluated queuing disciplines are Drop Tail, SFQ, DRR, and RED. The network topology used in the evaluation process is a realistic mapping of a typical Web proxy configuration in an enterprise network. The Web proxy lies in the middle between the router that connects the internal network segments and the external router that connects …