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We analyze and evaluate the performance of a distributed wireless system with an added Web cache server. We use OPNET™ simulation tools to perform two experiments. In the first one, keeping the number of wireless clients constant, data traffic at the remote server running Web applications is analyzed as the cache hit rate of the caching device is varied. We noticed that the load at the Web server is improved by having increased caching capabilities at the cache server. Interestingly, it is observed that the traffic improvement is the best at a certain range of caching. The second experiment investigates the pattern of data dropped, and the delay at the remote Web server as the number of wireless clients is varied at a fixed cache hit rate. The results from this study are expected to help us understand the importance of cache servers while planning and designing a distributed wireless system with many clients.

Performance Evaluation for Web Applications with Web Caching in a Distributed Wireless System Using Opnet™.