On Sun, 4 Feb 2001, Hunt Lee wrote:
> I have three subnet / route summarization questions but I don't
> understand the answer, any help would be greatly appreciated.
>
> Q1) Choose the appropriate classless network address and broadcast
> address for the IP address 10.6.38.50 with a subnet mask of
> 255.255.240.0
>
> A) 10.6.38.49 and 10.6.38.62
>
> B) 10.6.32.0 and 10.6.47.255
>
> C) 10.6.38.0 and 10.6.38.255
>
> D) 10.0.0.0 and 10.255.255.255
>
> Answer is B.
No its not. The answer is 10.6.38.48 and 10.6.38.63. It probably meant to
say classful.
> Q2) Given a classless route summarization of 72.8.0.0 /13. Which IP
> address fall into this scope?
>
> A) 72.15.36.8
>
> B) 72.13.1.1
>
> C) 72.8.20.10
>
> D) 72.7.200.100
>
> E) 72.16.7.4
>
> F) 72.40.1.8
>
> Answer is A, B & C - why isn't E the ansewr as well?
The range of 72.8.0.0/13 is 72.8.0.0 - 72.15.255.255. Its 8 Class B's.
> Q3) When using classless supernetting, which route best summarizes
> the following networks?
>
> 192.168.9.0
> 192.168.10.0
> 192.168.11.0
> 192.168.12.0
>
> A) 192.168.0.9 / 20
>
> B) 192.168.0.0 / 16
>
> C) 192.168.9.0 / 22
>
> D) 192.168.8.0 / 21
>
> I thought D is the answer, but the answer is C.
A /22 is 4 Class C's, a /21 is 8. I recommand finding or making (to
actually learn it) a subnet table and just keeping referencing it until
you don't need to anymore.
andy
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