802.3z: Gigabit Ethernet Protocol Architecture
•Physical Layer
–1000BaseLX: 1300 nm laser
(long infrared) 5 Km SMF
(long infrared) 5 Km SMF
–1000BaseSX: 850 nm laser
(barely infrared) 500 m MMF
(barely infrared) 500 m MMF
–1000BaseCX: 150W
balanced twinax 25 m
balanced twinax 25 m
–1000BaseT: 4 pair Cat5 UTP
100m
100m
Figure 13.1
Upper Layers
LLC
CSMA/CD
or
Full
Duplex
8B/10B
Decoder
&
Encoder
Serializer
&
Deserializer
Physical
Layer
Data
Link
Layer