[ee122] Homework 1: Base 2 or 10?
Lisa Fowler
fowler at eecs.berkeley.edu
Wed Sep 19 21:51:30 PDT 2007
For the purposes of this assignment, please use the bases as described
in each problem for each problem respectively.
Thanks!
Lisa
On 9/19/07, Jeremy Fleischman <jeremyfleischman at berkeley.edu> wrote:
>
>
>
>
> In the questions from the end of chapter 1 and question 2, we are required
> to convert between bits, bytes, megabytes, megabits, gigabytes, and
> gigabits. My understanding (from CS 61C) is that telecommunications (such as
> the internet) use base 10 as a conversion between many of these various
> units. For example (note that a capital B = bytes and a lowercase b = bits)
>
> 1 Kb = 10^3 b
>
> 1 Mb = 10^3 Kb = 10^6 b
>
> 1 Gb = 10^3 Mb = 10^9 b
>
>
>
> Furthermore:
>
> 1 B = 8 b
>
> 1 KB = 10^3 B = 8*10^3 b
>
> 1 MB = 10^3 KB = 10^6 B = 8*10^6 b
>
> 1 GB = 10^3 MB = 10^9 B = 8*10^9 b
>
>
>
> It was under these conversion factors that I did the first half of problem
> 1. When I reached problem 2, I noticed that it says "(Note: 1 KB = 2^10
> bytes, 1 Mbps = 10^6 bits/s)" These two appear to be contradictory, as one
> conversion uses base 2 and the other uses base 10. I thought that 1 KB =
> 10^3 bytes, not 2^10 bytes! Of course, if we are talking about data storage,
> then 1 KB could equal 2^10 bytes, however, don't we prefer the IEC notation
> 1 KiB = 2^10 bytes?
>
>
>
> I've already switched my homework from base 2 to base 10, please let me know
> if I need to switch back!
>
> Jeremy Fleischman
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