1.8.1 The 802.3 and Ethernet Architectures
nEthernet only consists of one single layer, the Media Access
Control (MAC) layer
nIEEE 802.3 has two
sublayers:
–The Media Access Control sub-layer (MAC): responsible
for gaining access to the shared medium. It
is topology dependent.
–The Logical Link Control sub-layer (LLC): responsible
for reliable communications over a LAN
and provides a unified interface to the network layer, i.e., hides the underlying LAN from the upper layers.