Figure $2$

Refer to Figure $2$ above, suppose that the server, with IP address $1\mathrm{.}2\mathrm{.}5\mathrm{.}3$ is configured to

use the right$-$hand router for its non$-$local traffic. Assume that the ARP tables for all hosts

and routers are empty initially.

$($a$)$ List all packets that must be sent from one network$-$level component to another, in

order to deliver a packet from the server to the host with IP address $1\mathrm{.}2\mathrm{.}2\mathrm{.}9.$ For each

packet, specify which component sends it and which receives it and give a brief

description.

$($For example $-$ "left router to top router: ARP request for address x$.$x$.$x$.$x$")$

$($b$)$ What packets must be sent when the server sends a second packet to the same host?