Gigabit Ethernet
Comparison Summary

Topology Rules
for
Maximum Network Distance

All ethernet topologies have segment length limitations. The following chart provides a comparison between the distance restrictions for current ethernet topologies and Gigabit Ethernet.


Ethernet
10 BaseT		 Fast Ethernet
100 BaseT		 Gigabit Ethernet*
1000 Base x
Data Rate 10 Mbps 100 Mbps 1000 Base Mbps
(1 gigabit per second)
Cat 5 UTP 100 m (min) 100 m 100 m
STP/Coax 500 m 100 m 25 m
Multimode Fiber 2 km 412 m (hd)**
2 km (fd)*		 550 m
Single-mode Fiber 25 km 20 km 5 km

**IEEE spec half duplex
*  IEEE spec full duplex

Note: technical decisions made by the IEEE 802.3 standards group


 
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Last Modified: September 19, 1998