ip subnet zero

JSW77JSW77 Posts: 46Member ■■□□□□□□□□
im a little foggy on cidr, ip classless, ip subnet zero etc...Does ip subnet zero enable both the zero subnet and the broadcast subnet or just the zero? If it is specified that ip subnet zero is enabled, do you figure subnets as 2^n, or 2^n-1? is cidr expected knowledge for the ccna or is this more of a ccnp subject? thanks.

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