subnetting

Tags:
IP address
Networking
Subnets
"I have class C scenario were I know the Network address, which is 192.169.1.0, the required max # of physical subsets, which is 14, and the maximum host required per subset, which is also 14. What I need to know is what is the subset mask, what is the number of subsets available, what is the 1st network address, and what is the broadcast address of the 1st subset."

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In order to obtain 14 hosts per subnet you’ll need a subnet with 16 IPs, the first being the subnet identification and the last being the broadcast address leaving 14 host IPs. This would require a subnet with 4 bits being used for its size. Subtracking that from 32 bits used in IPv4 you’ll have a /28 network. The last octet of the mask would be 256 minus the 16 or 240, for a mask of 255.255.255.240. This division will give you 16 usable subnets. Using IP subnet zero the first subset would be 192.169.1.0/28 with a broadcast address of 192.169.1.15. Add 16 to the last octet to obtain the broadcast address for each subset.

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