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that gives you 16 subnets with 14 usable IPs for hosts that is because one is for subnet and one for broadcas in that subnet

for example: 192.168.1.0/28 - subnet number

192.168.1.15 -broadcast number

usable IPs for hosts - IPs between them that is 14

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14y ago
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14y ago

Looking at the default subnet mask for a class C network, you would receive:

255.255.255.0 with no subnets and a maximum number of clients of 254.

If you borrow 4 bits, that can give you 14 subnets, each of which has a maximum number of hosts (clients) of 14 per subnet. This is based on the rule of 2n - 2 for classical subnetting.

For a 0th subnet you would not need to subtract the 2.

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Q: Given class C address with a default subnet mask How many possible subnets and usable hosts if 4 bits were borrowed?
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