User`s guide

Signamax 065-7931 16-Port 10/100/1000BaseT/TX WebSmart Switch
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The diagram above shows the Ethernet architecture, LLC sub-layer, and
MAC sub-layer, which are responded to the Data Link layer, and transceivers, which
are correspond to the Physical layer in the OSI model. In this section, we are
mainly describing the MAC sub-layer.
Logical Link Control (LLC)
The Data Link layer is composed of both of the sub-layers of the MAC and
the MAC-client. Here the MAC client may be a logical link control or bridge relay
entity.
Logical link control supports the interface between the Ethernet MAC and the
upper layers in the protocol stack, usually the Network layer, which has nothing to
do with the nature of the LAN. Therefore, it can operate over other different LAN
technologies such as Token Ring, FDDI and so on. Likewise, for the interface to the
MAC layer, LLC defines the services with the interface independent of the medium
access technology and with some of the nature of the medium itself.
Coaxial/STP/UTP
IEEE 802.2 LLC
IEEE 802.3 CSM
A
/CD MAC
IEEE 802.3 PLS
ANSI X3T9.5 PMD
CS
IEEE 802.3
MAU
Physical
Layer
Data
Link
Layer
MII
Fiber