A netmask can be represented by which two ways?

Slash Notation $(80\mathrm{.}212\mathrm{.}212\mathrm{.}50/32)$ and Pound Notation $(80\mathrm{.}2012\mathrm{.}212\mathrm{.}50$:$124)$

Pound Notation $(80\mathrm{.}2012\mathrm{.}212\mathrm{.}50$#$24)$ and Decimal Numbers $($Netmask: $255\mathrm{.}255\mathrm{.}255\mathrm{.}0)$

Decimal Numbers $($Netmask: $255\mathrm{.}255\mathrm{.}255\mathrm{.}0)$ and Slash Notation $(80\mathrm{.}212\mathrm{.}212\mathrm{.}50/32)$