The authors propose three indirect star-type networks, the indirect star networks I and II and the star-delta network, and investigate their properties. An indirect star-type network is obtained by unfolding the star graph. The star-delta network is obtained through an unfolding scheme based on the recursive property of the star graph, and has n-1 switching stages. The star-delta network has the advantage of being controlled by the destination tag routing scheme. The indirect star-type networks are to the star graph as the indirect cube-type networks are to the n-cube. The authors analyze the performance of the indirect star-type networks under uniform traffic to investigate their potential as an alternative to the indirect cube-type networks for the future high-performance large multiprocessor systems.