Progress has been made in the development of a distributed information system simulator (DISS). While several DISS component models have been developed, two related models, an analytical model and a simulation model, are presented for illustration purposes and to highlight their worth, especially in comparison with Snapshot. The comparison highlights some interesting aspects of the Snapshot results, including some of its shortcomings. The Level 2 models focus on the operation and use of resources within a single DISS node or central processing unit (CPU). Level 2 includes the CPU, the primary memory and the input/output access devices. More specifically, the two models detailed herein deal primary with the CPU component of Level 2.