Best Network Prefix to use

Suppose I am using a class C address. What's the best prefix to use to support at least 2100 host ip address?

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2046 host addressses.
/21

so /20

so you got /20 by doing this 32-12=20? since 2^12=4096 and you can't use 2^11=2048 is too small?

FYou wrote: »

so you got /20 by doing this 32-12=20? since 2^12=4096 and you can't use 2^11=2048 is too small?

))))))))

Thanks bro!!!