Subnetting

Learn to Subnet

Pay attention to whether the examples excludes or includes Subnet Zero. Do not get into the habit of assuming the expected result is for the usable hosts. We always include subnet zero when determining the total number of addresses in the subnet. Never subtract 2, for the network and broadcast addresses, unless specifically asked for usable hosts.

Subnetting Practice

Practice make improvement!

Subnet Calculators

Use the calculators to check your work, not to do the work for you.

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