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While bandwidth for previous IP backbone networks deployed by Internet Service Providers typically has been limited to 34 Mbps, current and future IP networks provide bandwidth ranging from 155 Mbps to 2.4 Gbps. Thus, it is important to investigate the impact of emerging network technologies on the performance of cooperative Web caching protocols. In this paper, the authors present a comprehensive performance study of four cooperative Web caching protocols. They consider the Internet cache protocol ICP, Cache Digests, the cache array routing protocol, CARP, and the Web cache coordination protocol, WCCP. The performance of these protocols is evaluated using trace-driven simulation with measured Web traffic from NLANR.
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