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User Manual
24
This above diagram shows the Ethernet architecture, LLC sub-layer and
MAC sub-layer, which are responded to the Data Link layer, and transceivers, which
are responded to the Physical layer in OSI model. In this section, we are mainly
describing the MAC sub-layer.
Logical Link Control (LLC)
Data link layer is composed of both the sub-layers of MAC and MAC-client.
Here MAC client may be logical link control or bridge relay entity.
Logical link control supports the interface between the Ethernet MAC and
upper layers in the protocol stack, usually Network layer, which is nothing to do with
the nature of the LAN. So it can operate over other different LAN technology 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
IEEE802.3 CSMA/CD MAC
IEEE 802.3 PLS
ANSI X3T9.5 PMD
CS
IEEE 802.3
MAU
Physical
Layer
Data
Link
Layer
MII
Fiber
- User’s Guide 1
- Table of Contents 3
- Revision History 5
- About this user’s manual 7
- 1. Introduction 8
- User Manual 10
- 2. Installation 14
- 1 1111111 24
- 1 0000000 24
- 3. Basic Concept and 29
- Management 29
- 4. Operation of 53
- Web-based Management 53
- 5. Trouble Shooting 105
- Appendix A 106
- Technical Specifications 106
- Appendix B 110
- MIB Specifications 110
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