The main function of the physical layer of the OSI reference model is ______ .

 The main function of the physical layer of the OSI reference model is ______ .
A .  Physical address definition
B .  Establish an end-to-end connection
C .  Transmit bit stream between terminal equipment, define voltage, interface, cable standard and transmission distance etc.
D .  Transfer data from one end host to the other end host

View Answer

Answer:   C