Subneting question... please clarify

Hello guys,
I have recently encountered a subneting question which I need some explanation for. The question says:
You are attempting to properly subnet the IP space of one of the Testking location.
For the network “200.x.x.0” there is a need for 3 loopback interfaces, 2 point to
point links, one Ethernet with 50 stations and one Ethernet with 96 stations. What
option below would be the most efficient (for saving IP addresses)?
I answered with the follwing:
200.10.10.193/29, 200.10.10.194/29, 200.10.10.194/29
200.10.10.200/30, 200.10.10.204/30
200.10.10.128/26, 200.10.10.0/25
The correct answer for the question was
200.10.10.1/32, 200.10.10.2/32, 200.10.10.3/32
200.10.10.4/30, 200.10.10.8/30
200.10.10.64/26, 200.10.10.128/25
Even though the answer I provided wasn’t posted as a choice for the question, I still have some enquiries; Is my answer less efficient than the second or are they both ok? If not, why? Also, I can see that my selection for the loopback addresses isn’t as efficient but is it that big of a deal?
Thanks
CHEERS

Hi,
Your answer is one of many correct answers that are possible for this situation. Your choice of subnets is no less efficient than the answer given.
There could be various permutations of correct answers for this question since the various subnets can be situated at a number of places:
- the /25 subnet could be either 200.10.10.0/25 or 200.10.10.128/25
- the /26 subnet could be one of 200.10.10.0/26, 200.10.10.64/26, 200.10.10.128/26 or 200.10.10.192/26
I suppose in an exam scenario,they can't provide you all the options....
The answer given is one of many that could have been provided.
Hope that helps - pls rate the post if it does.
Paresh

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