Printer Model

LAN Environment

Printer Model

The simplest Computing Device model is the Printer equipment model. This model cannot generate independent data packets; therefore, its primary use in a LAN simulation is as a final destination for data packets from other Computing Device models. A sample control panel for a Printer model is shown in Figure 4.6.

Figure 4.6: Sample Printer Model Controls

All Computing Device models have the Bus Speed, Memory Size, and Processor Delay properties. While you can edit the Memory Size property, its value is not used during a simulation and its only function is documentation. The Bus Speed property is used to determine how long it takes a packet to travel between the processor and NIC of a model. The Send and Receive Processor Delays are used to simulate packet delays associated with processor processing. The processor packet delays are calculated using the following formula:

delay = MinDelay * ( PacketSize * [Delay/Byte] )

Note that there is nothing in this model specific to a printer and since a Printer model can only be a destination, its properties (processor delays and bus speed) affect only the routing protocol packets this model originates. As with all Computing Device models, you can display a window with processor traffic statistics using the Options $\Rightarrow$ Statistics selection from its pop-up menu.

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