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If I need to have a network of  509 hosts using class C,then do i need to join 2 Class c networks or 3? One class C gives us 256-2=254 hosts in case of subnetting.Does the same hold in case of super netting also?Or does in super netting one class c can give 256 hosts?

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Default mask of class C is 255.255.255.0 and maximum number of hosts supported by class C is 254.

We cannot have a network of  509 hosts using class C, unless we use supernetting.

Supernet mask of 255.255.254.0 would suffice to have a network of  509 hosts using class C.

#networks = 2

#hosts = 29 - 2 = 510

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