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TOPIC: Subnetting Question [number of networks]

Subnetting Question [number of networks] 10 years 2 months ago #25850

Hi,

I have question in subnetting.
Question: How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?

Well is it the answer is [16 networks and 14 hosts]??

I need to clear my doubt because the answer for this question according to actualtest.com is [14 networks and 14 hosts]!!

Which one is correct? 14 or 16 network??

Please help me.
Thanks[/img]

Re: Subnetting Question [number of networks] 10 years 2 months ago #25851

  • Smurf
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Old school, the same rule applies for networks as it does hosts, i.e 2^x-2 (x is bits)

Most hardware now allow the lower & upper (all 0's & all 1's) bits so it does work. The key is MOST. I have never come across them not being able to be used. Cisco devices have a command to turn this on (IP Subnet-Zero), this basically allows the additional range to be used.

Cheers

Re: Subnetting Question [number of networks] 10 years 2 months ago #25854

  • S0lo
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And thats just an example of the difference between cisco exams and the real world. In such cases, you have a "correct answer" and a "cisco answer". Use the cisco one only in your exams :o

Re: Subnetting Question [number of networks] 10 years 2 months ago #25857

cisco also counts Gateway as host.. so therefor I think Cisco's type of answer isn't any different from the real world.. or am I forgetting something ?!

Re: Subnetting Question [number of networks] 10 years 2 months ago #25871

alrite. thanks for all of u guys. Now im clear and will use old school formula 2^x-2, x=bit


Thanks guys!

Re: Subnetting Question [number of networks] 10 years 2 months ago #25872

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cisco also counts Gateway as host.. so therefor I think Cisco's type of answer isn't any different from the real world.. or am I forgetting something ?!


Gateway address is a valid host address ? It doesn't distinguish between what a host is, its just valid addresses within a subnet range.
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