Subnetting

OCTET STRUCTURE:

128 64 32 16 8 4 2 1

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1 1 1 1 1 1 1 1 = 255 (1+2+4+8+16+32+64+128)

0 0 0 0 0 1 1 1 = 7.7.7.7 (1+2+4)

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