You are given the IP address block $192\mathrm{.}168\mathrm{.}5\mathrm{.}0/24($network mask $255\mathrm{.}255\mathrm{.}255\mathrm{.}0)./24$ indicates that $24$ of $32$ bits are used for the network portion of an IP address and $8$ of the $32$ bits are used for the host portion. This block currently has $28=256$ host addresses.