Passed the CCNP -- Thanks! And one tough question:

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Thanks to those folks here who took the time to answer my questions. All the
hard work has finally paid off with a CCNP. Hopefully it's enough to get a
job out in Goleta, we'll see.

Took the 642-891, because I love a challenge.

Here's one that didn't make a whole lot of sense to me:

Using CIDR, what supernet can summarize the Public Class B range?

(Yes, it did say "the")

A) /8
B) /12
C) /16
D) /24

Well, B seems like it has to be the answer as I was looking for /2. I'm
guessing they meant "a class B range," not "the Class B range," which isn't
something you'd ever want to summarize. Their mistake or mine?

Cheers,
Owen




Re: Passed the CCNP -- Thanks! And one tough question:


Congratulations on passing CCNP!

My first inclination was that the correct answer should be /2 to cover the
first PUBLIC portion of the class B range.

But /12 could be used to create a CIDR summarization for the PRIVATE class B
range and that may have been what was intended (did they mean PRIVATE
instead of PUBLIC?).  Or, extrapolating much further, if used in a "deny"
statement with a "permit any" following, /12 could be used to exclude just
the PRIVATE range from B range leaving only the PUBLIC portions.  That seems
like quite a stretch though.

FWIW,
Robert




Re: Passed the CCNP -- Thanks! And one tough question:


Sometimes I think the question is presented with an intentional inaccuracy
to see if we can still come up with the "best" answer.   It's interesting
that the permutations that we thought of arrived at the same answer, even
though we might assume there was a typo in the available answers.

So while /2 represents the entire B class, it could also be used to
summarize for the PUBLIC range(s) of class B in the context of PRIVATE
addresses not being routed in the inter-domain routing.

I'm still pondering this one and probably over-thinking it.

Bob




Re: Passed the CCNP -- Thanks! And one tough question:


Well done Owen.

I wonder if you could describe what you did to study for the routing module?
I'm finding it pretty tough going!

Congratulations again, I wish I was in your shoes!!!

Regards

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