Abstract :
The increasing use of computer data communications over the past several years has spawned a variety of network architectures to support requirements for distributed processing. Developed by various R&D groups,1-3by the common carriers,4-4by minicomputer and mainframe manufacturers,7,8and by the vendors of traditional communications hardware,9,10these new architectures represent alternative means to similar ends. This article provides a framework for understanding existing and forthcoming systems, focusing particular attention on the impact of evolving requirements and technologies.
