Re: Help with manual summarization question required.

you are correct jason ..
/19 --> 32 blocksize ... 172.16.128.0 -- 172.16.159.255

since D is only / 28 --> 16 block size ..  172.16.124.0 -- 172.16.124.15 
which does not over lap.

if your book has a website, i'd check there for corrections... it happens 
from time to time.. its all good.. you are not crazy ..



"Jason" <SpamSpamSpam@[EMAIL PROTECTED]
> wrote in message 
news:Xns9A8973D6FE767SpamSpamSpamSpani****@[EMAIL PROTECTED]
> Can anyone explain the answer to this Boson ICND2 question, the question
> states:
>
> An engineer has implemented manual route summarisation with EIGRP in
which
> the one summary route is 172.16.128.0/19. Another engineer needs to 
> install
> a new VLAN & subnet. The following are some of the subnet numbers being
> considered by the second engineer for the new subnet. Which one lists a
> subnet that would not be represented as part of the existing summary 
> route?
>
> A. 172.16.144.0/28
>
> B. 172.16.164.160/28
>
> C. 172.16.180.0/28
>
> D. 172.16.124.0/28
>
> E. 172.16.152.128/28
>
> The answers are B & C but D also does not overlap? The explanation
states
> that the summary route represents the following range of numbers:
>
> 172.16.128.0 - 172.16.159.255
>
> The answers represent:
>
> 172.16.144.0/28: 172.16.144.0 - 172.16.144.15
>
> 172.16.152.128/28: 172.16.152.128 - 172.16.152.143
>
> 172.16.164.160/28: 172.16.164.160 - 172.16.164.175
>
> 172.16.180.0/28: 172.16.180.0 - 172.16.180.15
>
> 172.16.124.0/28: 172.16.124.0 - 172.16.124.15
>
> What am I missing?