| Jeff McAdams on 24 Feb 2006 00:25:18 -0000 |
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Toby DiPasquale wrote:
> On Thu, Feb 23, 2006 at 01:24:09PM -0800, Marc Zucchelli wrote:
>> I have a customer who was entertaining the notion of
>> hosting his server in house. I talked him out of it,
>> but I was curious about whether or not the bandwidth
>> he could get would handle his site. He is able to get
>> a business connection with 1Mbit upstream.
>> 1Mbit = 1024bits * 1024bits = 1,048,576bits
> 1Mbit == 1,000,000 bits per second
> As such, 1Mbit => 125Kbytes/sec.
> Network and disk are measured by powers of 10, not powers of 2 as you'd
> expect.
No, hard drives are frequently quoted in powers of 10...but that's hard
drive vendors being dumb.
Networks are basically *never* quoted in powers of 10. So Marc was
correct in the 1024 * 1024.
> A T1 is 1.54Mbit per second, over 150% faster than his current connection
> (assuming he's got a symmetric connection).
> 1.54Mbit/s => 192.5Kbytes/sec.
At the risk of being pedantic...
Its 1.544Mbit/s, but only 1.536Mbit/s is useable...the other 8kbit/s is
used by the framing on the circuit. That's not so much to make a really
noticeable difference, though.
> Lots of people think that networking and disk are measured along powers
> of 2 units, like RAM. I used to think that myself, but its not true. Check
> the real number of bytes on your hard disk for some confirmation.
Yeah, hard drive vendors are dumb...but networks still use powers of
2...basically universally.
--
Jeff McAdams
"They that can give up essential liberty to obtain a
little temporary safety deserve neither liberty nor safety."
-- Benjamin Franklin
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