Switches
Switches control the flow of network traffic
based on the address information in each packet. A switch learns which devices
are connected to its ports (by monitoring the packets it receives), and then
forwards on packets to the appropriate port only. This allows simultaneous
communication across the switch, improving bandwidth.
This switching operation reduces the amount of
unnecessary traffic that would have occurred if the same information had been
sent from every port (as with a hub).
Switches and hubs are often used in the same
network; the hubs extend the network by providing more ports, and the switches
divide the network into smaller, less congested sections.
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