Starting from the bottom, which is managing the physical characteristics of the hardware and data flow in the bit-level to end at the application layer in the top section.
Starting from the bottom, which is the management of the physical characteristics of the hardware and the transmission of data at the bit to end at the application layer on top.
Starting from the bottom end which is dealing physical characteristics of hardware and sending a stream of information in the bit level to end at the application layer in the top.