Re: administrative staff using Macs?

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From: George C. Kaplan (gckaplan@ack.berkeley.edu)
Date: Tue Jul 22 2003 - 16:30:34 PDT

In message <Pine.GSO.4.53.0307221103040.11918@rancid.berkeley.edu>, Michael Sin
atra writes:
>
> This discussion reminded me of something Tom H. asked me to do a long
> while back, which is to provide a *rough* estimate of the number of
> Apple/Mac devices on campus using CNS's ARP cache data.

Michael's list does not include the AirBears wireless networks, because
of the way the access control works. So I applied his list of Apple
OUIs to the AirBears login records. For privacy reasons, we don't keep
long-term login records for AirBears, but here's a breakdown for the 4
weeks through 21 July. As with Michael's numbers, I counted distinct
MAC addresses with Apple OUIs (for the "Apple" column) or any OUI (for
the "total" column) during the given time periods:

  Four weeks: 172 Apple, 1050 total (16.4%)

By day of the week:

  Mondays: 83 Apple, 505 total (16.4%)
  Tuesdays: 82 Apple, 500 total (16.4%)
  Wednesdays: 71 Apple, 499 total (14.2%)
  Thursdays: 66 Apple, 468 total (14.1%)
  Fridays: 47 Apple, 344 total (13.7%)
  Saturdays: 14 Apple, 94 total (14.9%)
  Sundays: 19 Apple, 120 total (15.8%)

Notes:

- These are taken from AirBears login records, so they represent
computers with web browsers and keyboards. In other words, the numbers
aren't skewed by network devices or printers.

- The Apple/total percentages correspond fairly well to Michael's
numbers for the rest of campus.

- The total number of distinct users during the 4-week period (1050) is
low because it's summer. AirBears usage during the school year is more
than double this number. It'll be interesting to see if the Apple
percentage changes much when the students come back. 

-- 
George C. Kaplan                            gckaplan@ack.berkeley.edu
Communication & Network Services            510-643-0496
University of California at Berkeley
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