Hubs/Repeaters are used to connect
together two or more network segments of any media type. In larger designs,
signal quality begins to deteriorate as segments exceed their maximum length.
Hubs provide the signal amplification required to allow a segment to be
extended a greater distance. There are two kinds of hubs namely:
1. Passive hubs simply forward any data packets they receive over one port from
one work station to all the remaining ports.
2. Active hubs, also sometimes referred to as multiport repeaters regenerates
the data bits in order to maintain a strong signal.
An important fact to note about hubs is that they only allow users to share
ethernet. A network of hub/repeaters is termed "Shared Ethernet",
meaning that all members of the network are contending for transmission of data
onto a single network (collision domain). This means that individual members of
a shared network will only get a percentage of the available network bandwidth.
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