Computer Science - Networking - Discussion
Discussion Forum : Networking - Section 5 (Q.No. 13)
13.
You are working with a class C network. You are required to configure it for five subnets, each of which will support 25 nodes. What subnet should you use?
Discussion:
3 comments Page 1 of 1.
Rajaneesh kumar said:
1 year ago
Good Explanation, Thank you both for explaining.
Lekshmi said:
1 decade ago
For Class C we have 3n/w and 1 host portion(nw.nw.nw.h).
No.of subnets = 2^n-2 = 5.
So n=3(indicates the no: of 1's, higher order, in host portion).
So subnetmask is 255.255.255.11100000.
i.e 255.255.255.(128+64+32).
So answer is 255.255.255.224.
No.of subnets = 2^n-2 = 5.
So n=3(indicates the no: of 1's, higher order, in host portion).
So subnetmask is 255.255.255.11100000.
i.e 255.255.255.(128+64+32).
So answer is 255.255.255.224.
Neha said:
1 decade ago
Network address class C.
No.of subnets = 5.
Binary equivalent = 11111111.11111111.11111111.00000000
Decimal value of octet = 128.64.32.16.8.4.2.1
3 bits are required to create 5 subnets = 4+2+1-1-1=5 subnets.
Add 3 high order bits to create the subnet mask = 128+64+32= 224
New subnet mask is 255.255.255.224
No.of subnets = 5.
Binary equivalent = 11111111.11111111.11111111.00000000
Decimal value of octet = 128.64.32.16.8.4.2.1
3 bits are required to create 5 subnets = 4+2+1-1-1=5 subnets.
Add 3 high order bits to create the subnet mask = 128+64+32= 224
New subnet mask is 255.255.255.224
(1)
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