Date: Wed, 7 Oct 1998 18:38:51 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: imp@village.org (Warner Losh) Cc: freebsd-net@FreeBSD.ORG, vev@michvhf.com, freebsd-hackers@FreeBSD.ORG Subject: Re: Dummynet Message-ID: <199810071738.SAA08935@labinfo.iet.unipi.it> In-Reply-To: <199810071752.LAA17076@harmony.village.org> from "Warner Losh" at Oct 7, 98 11:51:53 am
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> : actually i don't remember well how i implemented this in ipfw, but i > : think KB is for kilobyte and K or Kb is for kilobit > : > : (with K=1000, not 1024) > > kb/s == 1000 bits per second. > Kb/s == 1024 bits per second > kB/s == 1000 bytes per second > KB/s == 1024 bytes per second. > > In the SI units, as expanded for computer folks, b == bits, B == > bytes, k == 1000 and K == 1024. M == 1000000 or 2^20 (or sometimes > 1024 * 1000). there's nothing worse than imprecise definitions! the b/B differentiation is widespread, but k/K are often used interchangeably. What i know for sure is that network bandwidths are seldom measured with powers of 2, i.e. 64k means 64.000 not 65536, ethernet is 10Mbit= 10.000.000, etc. disk capacities... there K and M were used for 2^10 and 2^20 respectively, but now it is more and more common to use them for 10^3 and 10^6, and i hope the unit will not shrink as it happened to the "monitor inch" ! cheers luigi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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