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How to calculate subnet masks in IPv6

Can you tell me how to calculate subnet masks in IPv6?

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You calculate IPv6 subnet masks the same way as you would in... IPv4. For more information on how to do this, you can check out's Crash Course on the fundamentals of IP addressing and subnetting or this tip from David Davis on how to calculate a subnet mask using the subnet's formula.

This was first published in December 2008

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