Cisco 360 Lab 25

Everybody,

I have a question on Lab25 section 3.4. In the lab topology they ennumerate
the IP addresses for all the routers and leave R2,SW3,R5 with a ? mark for
the subnet mask(network 141.34.25.X/?). The last octet for each router is
.2, .3, .5 respectively. Definitely a clue, section 3.4 states to set up
each router IP address and assign the shortest subnet length mask. I
calculated /29 (255.255.255.248) for the mask, whereas the guide states to
set it to /27 (255.255.255.224).

I am asking this basic question since it can come up on the exam and
getting it wrong means the entire IGP setup is incorrect. They don't give a
lot of clues or explanantion for this and I am wondering if there is a
method to determine the shortest length because this seems a little
arbitary. Asking the proctor may or may not make this clearer. Any insight
from anybody who has done this lab would be appreciated.

Thanks

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Received on Tue Mar 06 2012 - 09:11:18 ART