
v
Contents
About This Guide
Audience ........................................................................................................................xviii
Before You Begin ...........................................................................................................xviii
Bay Networks Customer Support ..................................................................................xviii
CompuServe .............................................................................................................xix
InfoFACTS ................................................................................................................. xx
World Wide Web ........................................................................................................ xx
How to Get Help .............................................................................................................. xx
Conventions .....................................................................................................................xxi
Ordering Bay Networks Publications ...............................................................................xxi
Acronyms ........................................................................................................................xxii
Chapter 1
Overview of Line Protocols
LAN Protocols .................................................................................................................1-1
Ethernet Overview ...................................................................................................1-1
Ethernet Topologies ...........................................................................................1-1
Data Flow ..........................................................................................................1-3
Medium Access Control .....................................................................................1-3
Ethernet Frame Formats ....................................................................................1-3
Ethernet Media ..................................................................................................1-4
Token Ring Overview ...............................................................................................1-5
Token Ring Topology ..........................................................................................1-5
Data Flow and Medium Access Control ............................................................1-6
FDDI Overview .........................................................................................................1-6
FDDI Dual Counter-Rotating Ring Architecture .................................................1-7
FDDI Ring Operation .........................................................................................1-9
FDDI Ring Maintenance ..................................................................................1-10
FDDI SMT ........................................................................................................1-10
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