16 Sep
2016
16 Sep
'16
4:59 p.m.
On Sep 16, 2016, at 5:47 PM, Antonio Carlini
<a.carlini at ntlworld.com> wrote:
I once worked for a company that said Ethernet switch ports were 20 Mb/s because they are
10 Mb/s each way.
But with that oddball exception, your statement is accurate for networks. In other
domains, not so much. Fibre Channel is marketed as x Gb/s (x = 1, 2, 4, 8, 16...) but in
fact x is GBaud (rounded slightly; the original rate is 1.0625 GBaud). So the real speed
is 800, 1600, ... Mb/s.
By Fibre Channel standards, the original Ethernet would have been called 20 Mb/s (since
it's 20 MBaud, being Manchester encoded), and Fast Ethernet would be 125 Mb/s (since
it's 125 MBaud, with 4b/5b coding) and so on. But networking people aren't so
confused (or whatever).
paul
...
I've never encountered anyone
claiming that a 10Mb/s network means anything other than ten million bits per second.