For a given LAN scenario:

$1.$ Assign an IP address to the left interface of the router, given that the subnet part of IP

addresses are $24$ bits.

$2.$ If B wants to sent an IP datagram to A and know$$s A$$s IP address $-$ does B also need to

know A$$s MAC address to send the datagram to A$?$ IF so$,$ how does B get this info? IF

not, explain why not.

$3.$ Assume B wants to send an IP datagram to D$,$ and knows D$$s IP address. Does B also

need to know D$$s MAC address to send the datagram to D$?$ If so$,$ how does B get this

info? If not, explain why not.

$4.$ IF a router R has a datagram $($originally sent by B$)$ to send to D$,$ what are the MAc

addresses on the frame that is sent from router to D$?$ What are the IP addresses in the IP

datagram encapsulated within this frame?