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You are here: Home / ICND1 / Day 5 – IP Addressing / Day 5 Tasks / Variable Length Subnet Masking

Variable Length Subnet Masking

Using VLSM
Look at the following network:

  • 192.168.1.0/24 = 1 network with 254 hosts

While this may work fine, what if your network requires more than one subnet? What if your subnets have less than 254 hosts in them? Either situation requires some changes to be made. If you applied a /26 mask to your network instead, you would get this:

  • 192.168.1.0/26 = 4 subnets with 62 hosts

If that wasn’t suitable, what about a /28 mask?

  • 192.168.1.0/28 = 16 . . .

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