Answer the following three questions:

a$)$ Do routers have IP addresses? If so$,$ how many?

b$)$ When a large datagram is fragmented into multiple smaller datagrams, where are these smaller

datagrams reassembled into a single larger datagram?

c$)$ What is the $32-$bit binary equivalent of the IP address $191\mathrm{.}31\mathrm{.}122\mathrm{.}43$