Exam Paper mistake, I'm not being an idiot?

hellarda

hellarda

hellarda

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Joined
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Hi all,

I am currently studying a Electronic Engineering degree and doing a module on networking/protocols etc.

Just had my exam just now and I am convinced that there was a mistake in the last question. I asked the invigilator who tried to contact the exam setter but he was 'unable to be contacted' Anyway, just to check I'm not going mad could someone please check this?

a) A company is assigned an IP address range of 187.73.82.0/24

It then asks to say the highest IP address and the number of IP addresses availbe - fine, in this case 254 addresses. Anyway part b)

b) the company wishes to divide the range in a) into 4 sub nets, A, B, C and D. Subnet A has 350 users, subnet B and C have 100 users and subnet D has 73 users.

Allocate the addresses suitably and include the netmask for each subnet in your answer.

Now this is impossible right? Without the use of Private IP addresses (which is not what the question is asking) this cannot physically be done?

Please tell me I'm not going mad :D

EDIT: (Yes we have exams at 6pm :( )
 
Yeah you aren't fitting 623 clients into a /24.

Even a /23 which is the largest that can start at 187.73.82.0 doesn't have enough space.
 
I'm not surprised tbh if it is wrong - I did electronics engineering and the first 1/3rd of one of the exams was on a subject that wasn't part of what we were taught (should have been) - mostly around calculating bandwidth for cctv systems (which resulted in most people failing) and then the 2nd part was on Boolean logic with several errors in the exam paper.
 
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