Subnetting an IP Address

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To calculate the number of possible subnets, use the formula 2. n, where n equals the number of host bits borrowed. For example, if three host bits are borrowed, then n=3. 2. 3 = 8, so eight subnets are possible if three host bits are borrowed. The table below lists the powers of 2.

  Host, Number, Address, Bits, Calculate, Ip address, Number of host bits, Host bits