This thesis conducts a performance evaluation study on a token ring local area network. The investigation is based on an analytic model which describes the token ring network to a sufficient level of detail. A queueing model with cyclic-service is applied for the performance evaluation of the token ring network. This study defines the performance measures, i.e., mean throughput rate and average message transfer delay, and derives the relations between performance measures and system workloads. Besides this analysis, stability conditions for the system are derived. Finally, the performance sensitivity to variations in system parameters like channel capacity, cable length, number of stations, and message lengths is discussed.