a$.$ Referring to the following internetwork, when host A is connected to an Ethernet and wishes to send an IP packet to host C $,$ it first forwards the packet to router G$.$

i$)$ A knows the IP address of G$,$ what else does it need to know in order to forward the IP packet to G$?$

$[1$ mark$]$

ii$)$ If A does not know the information in the above sub$-$question $(4$b$.$ i$)),$ what protocol can it use to find the information? Describe how the protocol operates.

$[3$ marks$]$