On Jul 5, 2012, at 6:28 PM, Jon Lewis wrote:

> On Thu, 5 Jul 2012, William Herrin wrote:
> 
>> On Thu, Jul 5, 2012 at 8:22 PM, Owen DeLong <o...@delong.com> wrote:
>>> I would use questions such as the following:
>>> 
>>> 1.      How many end-sites can be numbered from a single /32.
>>>                (Correct answers: IPv4 - 1, IPv6 - 65,536)
>> 
>> IPv6 - 16,777,216 to 268,435,456 :p
>> 

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.


>> 
>>> 5.      What is the reason for the 100m distance limit within an ethernet 
>>> collision domain?
>> 
>> What's an ethernet collision domain? Seriously, when was the last time
>> you dealt with a half duplex ethernet?
> 
> 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


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