*3.3.2. Communication model perspective*

The system adopts a general communication model in which each node in the system can initiate a routing operation. Thus, any node can be a source. Moreover, any node can be a destination for that node. The selection of the source-destination pair is done randomly. The reason of adopting this model is to study a very general case and not limiting our scope to particular scenarios. Other more realistic scenarios are important to consider. However, such scenarios should also account for the application specifications.

## *3.3.3. Security perspective*

The existence of the reputation system does not imply a complete solution for all security problems. Our proposed solution tries to solve a particular security problem that is related to nodal behavior in the routing operation, as has been discussed earlier. Thus, some reasonable assumptions are made to make the work more focused on our problem:

