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