job screening question

David Edelman dedelman at iname.com
Fri Jul 6 02:33:49 UTC 2012


On 7/6/12 2:10 AM, "Randy" <randy_94108 at yahoo.com> wrote:

>--- On Thu, 7/5/12, William Herrin <bill at herrin.us> wrote:
>
>> From: William Herrin <bill at herrin.us>
>> Subject: Re: job screening question
>> To: "Jon Lewis" <jlewis at lewis.org>
>> Cc: "nanog at nanog.org" <nanog at nanog.org>
>> Date: Thursday, July 5, 2012, 6:43 PM
>> On Thu, Jul 5, 2012 at 9:28 PM, Jon
>> Lewis <jlewis at lewis.org>
>> wrote:
>> > 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 :)
>> 
>> If I was asking an ethernet question, I'd rather ask:
>> 
>> 1. How do you make a crossover ethernet cable to connect two
>> switches?
>> (cross the green and orange pairs)
>> 
>> 2. What happens if you plug that cable into a pair of
>> gigabit ethernet
>> switches? (mdix malfunctions, ports negotiate to 100 full,
>> on some
>> poorly implemented switches the mix of straight and crossed
>> wires
>> eventually damage the ports so they can no longer do gige)
>> 
>> Regards,
>> Bill Herrin
>
>
>Or for that matter, in the absence of auto-MDI/MDIX:
>
>1) when is a straight-through cable *required*?
>2) when is a cross-over cable *required*?
>
>How about another HR-Question:
>
>what do 0.0.0.0/1 and 128.0.0.0.0/1 as static-routes accomplish?
>
>./Randy
>

My favorite screening question at the moment is: What does a NULL-Route
for 169.254.0.0/16 not fix on a Cisco router? Answer - Compliance with RFC
3927 because it doesn't fix the problem of a link-local source address.
Answers that also mention proxy-ARP result in immediate interviews.

--Dave






More information about the NANOG mailing list