Re: job screening question

[David Edelman <dedelman () iname com>]

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

> --- On Thu, 7/5/12, William Herrin <bill () herrin us> wrote:
>
> > From: William Herrin <bill () herrin us>
> > Subject: Re: job screening question
> > To: "Jon Lewis" <jlewis () lewis org>
> > Cc: "nanog () nanog org" <nanog () nanog org>
> > Date: Thursday, July 5, 2012, 6:43 PM
> > On Thu, Jul 5, 2012 at 9:28 PM, Jon
> > Lewis <jlewis () 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