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On 2/12/2022 12:28 PM, Bill Horne wrote:
The provider's fastest plan is available in select areas of the city
and will be rolled out to additional markets later this year.
...
I'm also curious about how a line that tops out at 940 Mbps can be
labelled "Gigabit" when it obviously isn't: let's see, I'll grab a
virtual pencil ...
940 divided by 1,000 is 0.94.
880 divided by 1,000 is 0.88.
So, Verizon's "Gigabit" service, according to Cnet, is only 94% of a
Gigabit on download, and only 88% of a Gigabit on uploads.
Bill Horne
Speeds are measured using the burst rate of the physical layer. GigE essentially transmits a bit in a billionth of a second. But usable
capacity is always lower than the burst rate. There is protocol
overhead, like the packet headers, and sometimes some mandatory wait
time, like for upstream arbitration. So depending on how it's measured,
it's always somewhat below the burst rate. The FCC rule for compliance
with CAF/RDOF obligation is to net 80%.
--
Fred R. Goldstein k1io fred "at" ionary.com
+1 617 795 2701
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<div class="moz-cite-prefix">On 2/12/2022 12:28 PM, Bill Horne
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:%
3C20220212172853.231AA7A7@telecom2018.csail.mit.edu%3E">
<pre class="moz-quote-pre" wrap="">The provider's fastest plan is available in select areas of the city
and will be rolled out to additional markets later this year.
...
I'm also curious about how a line that tops out at 940 Mbps can be
labelled "Gigabit" when it obviously isn't: let's see, I'll grab a
virtual pencil ...
940 divided by 1,000 is 0.94.
880 divided by 1,000 is 0.88.
So, Verizon's "Gigabit" service, according to Cnet, is only 94% of a
Gigabit on download, and only 88% of a Gigabit on uploads.
Bill Horne
</pre>
</blockquote>
<br>
Speeds are measured using the burst rate of the physical layer. GigE
essentially transmits a bit in a billionth of a second. But usable
capacity is always lower than the burst rate. There is protocol
overhead, like the packet headers, and sometimes some mandatory wait
time, like for upstream arbitration. So depending on how it's
measured, it's always somewhat below the burst rate. The FCC rule
for compliance with CAF/RDOF obligation is to net 80%.<br>
<br>
<pre class="moz-signature" cols="72">--
Fred R. Goldstein k1io fred "at" ionary.com
+1 617 795 2701</pre>
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