$172\mathrm{.}16,0\mathrm{.}0/12$ is one of the subnets $($blocks of IPV $4$ addresses$)$ reserved by the Internet Assigned Numbers Authority $($IANA$)\text{'}$for private networks.

This address range starts at $17216\mathrm{.}0\mathrm{.}0\mathrm{.}1$ts size is defned by the prefix length $12,$ which indicates that the addresses in this subnet are defined by having the same first $12$ bits: Recall that an IPv$4$ address is a $32$ bit number

What is the highest address in this address range?

$17216\mathrm{.}255\mathrm{.}255$

$17231\mathrm{.}255\mathrm{.}255$

$172\mathrm{.}63\mathrm{.}255\mathrm{.}255$

$172127255\mathrm{.}255$