Based on Figure $3,$ answer the following questions.

Figure $3$

a$)$ Configure Router $1,$ Router $2,$ Host $1$ and Host $2$ with suitable IP addresses and subnet

masks by completing Table $1($Use the IP addresses given as a guidance$).$ Shadowed

cells are not required.

$(3$ Marks$)$

Table $1$

b$)$ A frame is being sent from Host $1$ to Host $2.$ Which source MAC and IP addresses will

be included in the frame when it leaves Router $2?$

$(2$ Mark$)$

c$)$ A technician has added a new workstation to the switch with the IP address, default

gateway and subnet mask that are shown in Figure $4.$ What problem could happen to

the workstation and how to rectify this problem?

$(3$ Marks$)$

$($Total: $10$ Marks$)$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?