S1836 Thunder 100
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Shared hubs
In a shared network environment, computers are connected to hubs
called repeaters. All ports of the repeater hub share a fixed amount of
bandwidth, or data capacity. On a 100 Mbps shared hub, all nodes on
the hub must share the 100 Mbps of bandwidth. As stations are added
to the hub, the effective band-width available to any individual station
gets smaller. Shared hubs do not support full duplex.
Think of a shared repeater hub as a single-lane highway that everyone
shares. As the number of vehicles on the highway increases, the traffic
becomes congested and transit time increases for individual cars.
On a shared hub all nodes must operate at the same speed, either 10
Mbps or 100 Mbps. Fast Ethernet repeaters provide 100 Mbps of
available bandwidth, ten times more than what’s available with a
10BASE-T repeater.
Repeaters use a well-established, uncomplicated design, making them
highly cost effective for connecting PCs within a workgroup. These are
the most common type of Ethernet hubs in the installed base.
Switching hubs
In a switched network environment, each port gets a fixed, dedicated
amount of bandwidth. In the highway scenario, each car has its own
lane on a multi-lane highway and there is no sharing.
In a switched environment, data is sent only to the port that leads to the
proper destination station. Network bandwidth is not shared among all
stations, and each new station added to the hub gets access to the full
bandwidth of the network.
If a new user is added to a 100 Mbps switching hub, the new station
receives its own dedicated 100 Mbps link and doesn’t impact the 100
Mbps bandwidth of another station. Switching hubs can effectively
increase the overall bandwidth available on the network, significantly
improving performance. Switching hubs can also support full duplex.
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