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A. A simple repeater backbone
Coax backbone
10/100BaseT hubs
B. Multilevel hub backbone
C. A bridged backbone
Bridge or router/switch
Bridge or router/switch
D. A collapsed-backbone router/switch
Multiport router/switch
FIGURE 14.3
Different types of backbones used in Ethernet networks.
individually at each hub that is to be connected to the backbone. In some LAN
backbone topologies, a backbone ring must be formed, linking each telecommuni-
cations room. Token-Ring and FDDI are examples of this backbone ring method.
Unlike the telephone scenario, the LAN backbone connections do not simply
combine individual station cables into larger multiplier cables. LAN backbones usu-
ally require one backbone connection for each group of hubbed workstations that
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