Given an IP address and mask of 192.168.0.0/255.255.255.0 (address/mask), design an IP addressing scheme?

It has to satisfy the following requirements:





Subnet .................... Number of Hosts


Subnet A .................... 30


Subnet B .................... 25


Subnet C .................... 10





I need to know the following:


Number of bits in the subnet


New IP mask (decimal)


Maximum number of usable subnets (including the 0th subnet)


Number of usable hosts per subnet


IP Subnet


First IP Host Address


Last IP host address





All for the Subnet A,B and C...thanksGiven an IP address and mask of 192.168.0.0/255.255.255.0 (address/mask), design an IP addressing scheme?
Are you allowed to use VLSM? If so:





Net: 192.168.0.0/24





Subnet A: 192.168.0.0/27


Subnet B: 192.168.0.32/27


Subnet C: 192.168.0.64/28





Number of bits in the subnet:


A: 27 if it asks all net's bits, 3 if it asks only subnet's bits ( my English is not good enough :s )


B: 27 if it asks all net's bits, 3 if it asks only subnet's bits


C: 28 if it asks all net's bits, 4 if it asks only subnet's bits





New IP mask (decimal)


A: 255.255.255.224


B: 255.255.255.224


C: 255.255.255.240





Maximum number of usable subnets (including the 0th subnet)


I don't really understand this question. I'll write down what I'm thinking it asks, and if it is this, I'll might be right.


You have 2 subnets using 27 bits, 1 subnet using 28 and now -%26gt;I think%26lt;- we have to find how many subnets we can have using 31 bits. They are 88.


88+2+1 = 91(?)





Number of usable hosts per subnet:


Subnet A: 30


Subnet B: 30


Subnet C: 14





IP Subnet:


Subnet A: 192.168.0.0


Subnet B: 192.168.0.32


Subnet C: 192.168.0.64





First IP Host Address


Subnet A: 192.168.0.1


Subnet B: 192.168.0.33


Subnet C: 192.168.0.65





Last IP Host Address


Subnet A: 192.168.0.30


Subnet B: 192.168.0.62


Subnet C: 192.168.0.78





edit: Bomber's referenced calculator, as far as I can see, doesn't use VLSM.


So, if you are not allowed to use VLSM then try the calculator.


If you have to use VLSM, then the calculator won't give you the results you want.Given an IP address and mask of 192.168.0.0/255.255.255.0 (address/mask), design an IP addressing scheme?
Here are some sites to learn and practice subnetting:





http://easysubnet.com/


http://subnettingquestions.com
check this out and work it out for yourself http://www.subnet-calculator.com/

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