classful subnet table

What is a classful IPv4 address?
The definitions of what this is will be included below. This will include the zero subnet or as many people in the industry will call it ‘subnet-zero.’
These definitions will also be using a CIDR notation.

Directly below areĀ unicast address space – this is the most important addressing used.

Class A –
Class B –
Class C –

Now this is multicast address space – typically, this is not as important until we start using VOIP and Video applications within our network.

Class D –
Class E –

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