Ethernet Communications Modules, 3rd Edition, Rev. D
2–12
Chapter 2: Setup and Installation
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2
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A
B
C
D
Star Topology
Hub or Repeater
10/100BaseT
or
10BaseFL
Star-Bus-Star Topology
Hub or Repeater
10Base2
10Base5
10BaseT
or
10BaseFL
Any Backbone
10BaseT
10BaseFL
100BaseT
Hubs or repeaters can connect together to make it possible to connect more devices to the
network or to extend the range of the network
NOTE:
Hubs or repeaters often designate one port for uplink to another hub. This port may not be able
to be used to connect to a PLC. If the uplink port is used to connect to another hub, it may disable the
adjacent port. Use of the uplink port may require the use of a crossover cable.