Specifications

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Contents
CHAPTER 1 OVERVIEW
Purpose of This Manual .........................................................................................................1-1
Who Should Use This Manual................................................................................................1-1
Structure of This Manual ........................................................................................................1-2
CHAPTER 2 INTRODUCTION
Ethernet History .....................................................................................................................2-1
Ethernet Features ..................................................................................................................2-2
Media Access Method .....................................................................................................2-2
Bandwidth........................................................................................................................2-2
Transmission Medium......................................................................................................2-3
Frame Transmission.........................................................................................................2-4
Ethernet Topologies.........................................................................................................2-4
Bus Topology.............................................................................................................2-5
Ring Topology............................................................................................................2-6
Star Topology ............................................................................................................2-6
Hybrid Network Topology ..........................................................................................2-7
CHAPTER 3 ETHERNET LAN STANDARDS
The Open Systems Interconnect (OSI) Model .......................................................................3-1
Application of the OSI Model ...........................................................................................3-2
CHAPTER 4 ETHERNET DATA FRAMES
Manchester Encoding ............................................................................................................4-1
Ethernet Data Frames............................................................................................................4-3
Data Frame Size..............................................................................................................4-4
Data Frame Types............................................................................................................4-5
Ethernet II Frame Type ....................................................................................................4-6
Ethernet “Raw” Frame Type .............................................................................................4-6
Ethernet 802.2 Frame Type .............................................................................................4-7
Ethernet SNAP Frame Type.............................................................................................4-9
Ethernet Addressing Schemes ......................................................................................4-10
Specific Addressing.................................................................................................4-10
Multicast Addressing...............................................................................................4-11
Broadcast Addressing.............................................................................................4-11