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In terms of scalability, a promising system architecture is a two-level hierarchical architecture Although the two-level hierarchical architecture is believed to have good properties with respect to scalability, not much is known about its performance characteristics Contributions Queueing theory is used to develop a performance model for the two-level(More)
In recent years, protocols have been developed to ensure secure communications over the Internet, e.g., the secure sockets layer (SSL) and secure electronic transaction (SET). Deployment of these protocols incurs additional resource requirements at the client and server. This may have a negative impact on system performance. In this paper , we consider a(More)