#$2$ You are a network planner tasked with developing an IP structure for the following

networks. The IP space is to be assigned sequentially from the lowest to the highest

address. The largest subnet is to be assigned first then followed in turn by the next largest

subnet until they are all assigned. The answers are to be put into the appropriate boxes in

Table $2.$ You have

the address space $172\mathrm{.}16\mathrm{.}80\mathrm{.}0/20.$ The networks are listed below:

Network A: $129$ hosts

Network B: $1023$ hosts

Network C: $47$ hosts

Network D: $76$ hosts

Network E: $9$ hosts

Range of unused addresses is