Question $3.$ This question concerns IP packet routing.

a$.$ How many possible IP addresses are there in IPV$6?($Ignore any reserved or special addresses and give the total possible number.$)$

b$.$ Consider the network of LANs in the diagram below. Dark squares are routers, and light squares are hosts. Give the IP routing tables at both routers, including netmasks and gateways.

c$.$ Give, and explain, the path through the nerwork for a packet originating at $128\mathrm{.}100\mathrm{.}13\mathrm{.}1$ with destination $128\mathrm{.}100\mathrm{.}11\mathrm{.}2.$

d$.$ Consider the IPv$4$ address range $($with netmask$)10\mathrm{.}0.\frac{0\mathrm{.}0}{24}.$ What range of addresses does this cover?