<P> IEEE 802 divides the data link layer into two sublayers: </P> <Ul> <Li> Medium access control (MAC) layer--responsible for controlling how devices in a network gain access to a medium and permission to transmit data . </Li> <Li> Logical link control (LLC) layer--responsible for identifying and encapsulating network layer protocols, and controls error checking and frame synchronization . </Li> </Ul> <Li> Medium access control (MAC) layer--responsible for controlling how devices in a network gain access to a medium and permission to transmit data . </Li> <Li> Logical link control (LLC) layer--responsible for identifying and encapsulating network layer protocols, and controls error checking and frame synchronization . </Li>

The lower layer of the osi reference model is