[154577] in North American Network Operators' Group
Re: job screening question
daemon@ATHENA.MIT.EDU (Owen DeLong)
Thu Jul 5 22:41:24 2012
From: Owen DeLong <owen@delong.com>
In-Reply-To: <Pine.LNX.4.61.1207052124480.4715@soloth.lewis.org>
Date: Thu, 5 Jul 2012 19:37:02 -0700
To: Jon Lewis <jlewis@lewis.org>
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jul 5, 2012, at 6:28 PM, Jon Lewis wrote:
> On Thu, 5 Jul 2012, William Herrin wrote:
>=20
>> On Thu, Jul 5, 2012 at 8:22 PM, Owen DeLong <owen@delong.com> wrote:
>>> I would use questions such as the following:
>>>=20
>>> 1. How many end-sites can be numbered from a single /32.
>>> (Correct answers: IPv4 - 1, IPv6 - 65,536)
>>=20
>> IPv6 - 16,777,216 to 268,435,456 :p
>>=20
I'd accept those if I was willing to send the candidate to rational IPv6 =
networking re-education camp.
If I expected the candidate to be able to do real work immediately, I =
would require the correct answer
as specified above.
Assigning a /56 to an end-site is bad juju. Assigning a /60 is pure =
useless evil.
>>=20
>>> 5. What is the reason for the 100m distance limit within an =
ethernet collision domain?
>>=20
>> What's an ethernet collision domain? Seriously, when was the last =
time
>> you dealt with a half duplex ethernet?
>=20
> You've never (much less recently) seen a customer misconfigure their =
end of an ethernet handoff such that you end up with duplex mismatch? =
Granted, in that case, distance is irrelevant...but it is half =
half-duplex ethernet :)
Either way, the collision domain itself is irrelevant to the question at =
hand... The important thing is to find out that the candidate =
understands what an ethernet pre-amble is and why it is important.
Owen
