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- Switched ports?
July 30, 2009, 5:01 am
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I saw a wireless router described as having some ports and some switched
Is there an English way to describe the difference or something ... ? Are
switched ports ports you can click a witch to turn them off? Or are they
more like switching power supplies? Doesn't matter. I don't really know
what that means either.
Re: Switched ports?
This is some stuff I dug up last night.
There is a basic networking slide set here.
page 10 "Hub"
page 12 "Switch"
page 14 "Router"
As far as I know, the "Switch" uses MAC addresses, and learns what each
port has on it as far as a MAC address is concerned. That is how it
does a better job than a hub, by only sending the packet to the most likely
port with that MAC address.
You can get a bit more terminology from here, and some description
of how a switch learns where to send a packet. "Switched ports" may
be referring to Layer 2 switching.
This is an example of a switch chip. One of the applications
described, is to use the switch chip, as part of a router box.
So maybe at least some part of the operation of a router,
is actually done by a switch chip.
Because Ethernet is mature, it is unlikely you'd get more
detail than that. Maybe a datasheet would go into more detail.
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