3Com 9000 SX User Manual page 23

Network Configuration Example 1-5
Figure 1-1 Switch 9000 used in a backbone configuration
The Switch 3000 on each floor is provided with a Gigabit Ethernet
full-duplex link to the Switch 9000.
Using Gigabit Ethernet as a backbone technology removes bottlenecks
by providing scalable bandwidth, low-latency, high-speed data
switching.
In addition to providing a fast backbone between Ethernet LANs,
Gigabit Ethernet equipped file servers and services may be directly