$11.$ The first octet of an IPv$4$ address can represented in binary as $10111110.$ Which class of IPv$4$ address does it belong to$?($Select one$)$a$)$ Ab$)$ Bc$)$ Cd$)$ D $12.$ Compress the following IPv$6$ address as much as possible: FF$02$:$0$:$0$:$0$:$0$:$79$CD:$0$:ABCDFF$02$::$79$CD:$0$:ABCD $13.$ Which of the following is a private IP address range? $($Select one or more Valid choices$)$ a$)171\mathrm{.}31\mathrm{.}1\mathrm{.}200$b$)192\mathrm{.}168\mathrm{.}250\mathrm{.}250$c$)10\mathrm{.}255\mathrm{.}255\mathrm{.}10$d$)$ All of the above $14.$ If the following are using default subnet masks, which one$($s$)$ of the following are valid node IP addresses: $($select one$)$a$)220\mathrm{.}1\mathrm{.}1\mathrm{.}255$b$)10\mathrm{.}10\mathrm{.}0\mathrm{.}10$c$)208\mathrm{.}5\mathrm{.}48\mathrm{.}0$ d$)219\mathrm{.}240\mathrm{.}22\mathrm{.}015.$ Which of the following is IPv$6$ Loopback IP address?a$)$ ::$1$b$)127\mathrm{.}0\mathrm{.}0\mathrm{.}1$c$)$ FE$80$::$1$d$)$ ::$2$