I have designed a SOHO network. This network must contain a maximum of $20$ hosts. A classless subnet mask of $255\mathrm{.}255\mathrm{.}255\mathrm{.}254/27$ will be used for this network. DHCP and DNS server are the two server roles that will be used for this network. The IP address of the gateway is $192\mathrm{.}168\mathrm{.}1\mathrm{.}1.$ The IP address of the server is $192\mathrm{.}168\mathrm{.}1\mathrm{.}2.$ A router, a switch, $2$ printers, a wireless access point and $18$ client computers will be used. How many hosts are there