Abstract
The performance of different implementation choices of the ISO Transport Protocol Class 4 on top of a connectionless link layer protocol in the presence of transmission errors is studied by means of simulation. The performance measure investigated is the throughput which can be achieved in transferring files between two stations over a local-area or long-distance network. The results are compared to those obtained for the ISO Transport Protocol Class 2 on top of a connection-oriented link layer protocol. Simple analytical approximations for some of the throughput values are derived which explain the outcome of the simulation experiments. © 1991 IEEE