To design a parallel computer system, selecting an appropriate network is an important issue. This paper presents the simulation results on the performance of message passing interconnection networks used commonly in multiprocessor systems. Comparisons have been made on the performance of various inter-connection networks like crossbar, mesh, hypercube, tree and hypertree with wormhole routing. The performance factors compared include the throughput of these networks and message delay. To make a more general model for tree structured network, this paper present the definition of m-fold n-ary tree, which is the extension of the hypertree network.