While we have start this project which title was Data Link Simulation, we have built up the data flow diagram (DFD) which was used for developed the system or program which one we want to develop.

As the DFD show as below, that was the Context Diagram of the Data Link Simulation. Not only this, we also prepared the Leveling of the DFD for implemented our program while we developing the program.

Figure 8 :Context Diagram