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A network is also limited in its maximum size, when Repeaters and/or hubs are used to extend a Thin Ethernet (10base2) or Twisted Pair Ethernet (10baseT/UTP) network, on large configurations, a Switch may become necessary to optimize network utilisation..
An cable can be extended by installing Repeaters, which amplify the signal:
A Repeater counts on each segment as a node and can be connected at ANY location in the Thin-Ethernet cable.
However, if a network needs more than 2 repeater:
the following limitations apply:
When an Ethernet signal travels from its source to destination station, it can travel through:
– maximum of 5 segments
– maximum of 4 Repeaters/hubs
– maximum of 3 populated segments
(Populated segments have more than 2 nodes connected, un-populated segments have only a node at each end, so a 10baseT-segments is a non-populated segment).
And for this discussion, a 10BaseT-Hub is like a repeater and a 10baseT cable can be treated as a cable 10base2-cable with just 2 systems on it.
There can be more repeaters/hubs in the complete network, and an Ethernet signal can pass-by more than 4 Repeaters/hubs, as long it does not have to go THROUGH more than 4 Repeaters/hubs.
If these rules are violated, the network becomes unreliable.