The OSI model implies more layers than most computer systems employ. Computer system design causes this. If possible, use fewer layers. Reduced layers have drawbacks.

A computer system can have various chassis that contain components (hard-drive chassis, power-supply chassis, etc) and buses that contain cards. The entire system is composed of individual components (floppy drives, cd-rom drives), buses and chassis. Design a UML class diagram to specify the ‘is-a’ relationships needed in this exercise.

On the other hand, the OSI model requires that a computer system have a minimum of seven levels in order to be considered complete. Why not utilise a greater number of layers? What are some of the possible downsides associated with using fewer layers?

Provide an illustration of how a distributed system could profit from shared software resources. What would be the simplest way to sum up the present situation?