Subnet Mask | Wildcard | Range (My guess?)

255 - 1111 1111 | 0 0000 0000 | 1 Address 256 times (really 255 - 256 means you move across the dot 0.0->.0.0)

254 - 1111 1110 | 1 0000 0001 | 1-2 128x subnets = 256

252 - 1111 1100 | 3 0000 0011 | 1-4 64x '' =256

248 - 1111 1000 | 7 0000 0111 | 1-8 32x '' =256

240 - 1111 0000 | 15 0000 1111 | 1-16 16x '' = 256

224 - 1110 0000 | 31 0001 1111 | 1-32 8x '' =256

192 - 1100 0000 | 63 0011 1111 | 1-64 4x '' =256

128 - 1000 0000 | 127 0111 1111 | 1-128 2x '' = 256

Am I right on this if not please correct my mistakes

here is a pdf that kinda helped me

https://nsrc.org/workshops/2009/summ...subnetting.pdf

Also I remember reading and seeing video that even or odd numbers represent a different range

https://www.youtube.com/watch?v=Sg7UY5a9RkE

Help me understand the even and odd wild card mask idea.

Q178 - (Referencing a question that if need be I can go back and find it)

Does the range all begin with 1-2, 1-4, 1-8, 1-16 ...or do you, if given an address that is your starting point

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