The trackpad also establishes a flat layer beneath the screen that looks sleek and smooth in line with the four navigational buttons.

The device management network setup is usually very simple: a flat-layer two-type network on a 10/100 switch is acceptable for device management purposes, so no further explanation is needed.

This layer is responsible for running the application's business logic and getting the relevant data (for example, running an SQL command or reading a flat file).