How to efficiently subnet a network

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subnetmask

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Feb 14, 2015
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I have base ip address 10.6.0.0/8 This is A class ip address. I need to divide this network into 12 subnets, and I need at least 80 computers in one network. Please explain how to calculate correctly subnets. I understand that subnets count should be power of two, so the nearest is 16. But I don't understand what should I do next. Please explain. I have spent day trying to understand this.Thanks.
 
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Dec 6, 2003
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I am really confused. If your IP address is 10.6.0.0/8, that means your network is 10.0.0.0/8. The means that each /16 has 65534 addresses, and you have 255 of those.

Read this if you are confused.
 
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