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A switch connects multiple computers together in a LAN. After
the first data transfer, it creates a “switch table” which matches
ports to connected devices by their MAC addresses.
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Switches, unlike hubs, are able to differentiate between
computers as the first time data passes through the switch, it looks to see
which MAC addresses are connected to which ports and remembers the layout.
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What Is It Good For?
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Creating a LAN. Hubs used to be recommended for this because
they were cheaper than switches, but switches are far superior as they minimize
the traffic on a network, decrease bandwidth usage, and only send data to
the intended computers.
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For instance Computer A wants to send data to Computer C. The
switch would see that Computer A is on port 1 while Computer C is on port 4.
The switch can then send data directly between them, with the data arriving at
port 1 and leaving the switch at port 4. This process hugely reduces bandwidth
usage when compared to a hub.
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Recommended Switch Model
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Great switches are relatively inexpensive these days and can be
found from most networking manufacturers. is a five port switch which you
can either use to create a LAN or can be plugged into one of your router’s
Ethernet ports to increase the amount of wired ports on your network.
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When buying a switch, there are managed and unmanaged varieties. Unmanaged are
the most common, which allow you to plug in and get using straight away with no
setup. Managed switches let you set up the network and allow you to prioritize
traffic, say Skype to ensure great call quality.
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