[154516] in North American Network Operators' Group
Re: job screening question
daemon@ATHENA.MIT.EDU (George Herbert)
Thu Jul 5 13:39:20 2012
In-Reply-To: <CAFANWtWgFV7Mg1rdLctGgHmtCNGUxNdn5pATNzhTW3vXOHP8vw@mail.gmail.com>
From: George Herbert <george.herbert@gmail.com>
Date: Thu, 5 Jul 2012 10:38:28 -0700
To: Darius Jahandarie <djahandarie@gmail.com>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jul 5, 2012, at 10:20 AM, Darius Jahandarie <djahandarie@gmail.com> wrote=
:
> On Thu, Jul 5, 2012 at 1:11 PM, Oliver Garraux <oliver@g.garraux.net> wrot=
e:
>> Seems fairly straightforward to me. It'll break path MTU discovery.
>=20
> Since Bill said "(not IP in general, TCP specifically)", I don't think
> PMTUD breaking is what he's looking for.
>=20
> I'd venture more along the lines of lack of Destination Unreachables
> making things hang.
All of DU failing, path MTU discovery, and congestion control / source quenc=
h might be the right / expected answer, which makes this a not great questio=
n. DU doesn't break TCP per se but would hang sessions until timeout; path M=
TU isn't a TCP function per se, though it uses TCP as the probe. Source que=
nch is only a small fraction of the TCP congestion control solution space no=
w.
My systems consulting company uses a HR prescreen of 20 questions. It took a=
team of senior consultants and HR some years to tune the questions in. The=
y need to be clear, have unambiguously correct answers, the answer correctne=
ss needs to be obvious to the HR / recruiter who isn't technical. =20
I think this one fails to have an unambiguously correct answer and an answer=
the non-tech recruiter / HR person will understand. So, probably time for a=
better question...
George William Herbert
Sent from my iPhone=
