Skip site navigation (1)Skip section navigation (2)
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

next in thread | previous in thread | raw e-mail | index | archive | help
> : 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-net" in the body of the message



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199810071738.SAA08935>