On Thu, 04 Nov 2004 16:57:58 -0600, L wrote:

>
> Thank you so much for correcting it. I'm also learning daily even though I
> have been working in IT for so many years.
>
> I'm still a bit confused about the bandwith of GbE. Can GbE protocol send 1
> Gbps data to each direction **at the same time**, so we can get 2 Gbps data
> transfered (full-duplex) over the wire?
>
> Thanks,
>
> T.

No, Ethernet media (Cat5) have 4 twisted pairs in them, 10Base-T and
100Base-T use two of them and transfer at 125 Mbps. When they made GbE
they made a new media standard (Cat5e) and was able to reliably get
250Mbps out of each pair. They than used all 4 pairs to get a grand total
of 1000Mbps. So 1000Mbps of bandwidth can be used per second, thus you
have 1000Mbps for up and down combined.
--
Andrew Balmos (abalmos)
abalmos [/@t\] gmail [/dot\] _remove_this_ [/com\]


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