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Started by Gibson DavidsonNov 3, 2021

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While subnetting Class B address how to find out subnets number?

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In this query why do we subtract 2 from 2^three whilst calculating some subnets? Whilst in CCNA books 2 isn't always subtracted?

172.16.0.0 /19
Subnets 2^3 -2 = 6
Hosts 2^13 -2 = 8190
Block Size 256-224 = 32

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