$1.$ Using CISCO Packet Tracer software create a simulation environment

mimicking the topology of the U$-$of$-$Canada campus local network, the

network encompasses the following.

a$)$ We have $3$ main departments, Building A$,$ Building B$,$ Building C$.$

b$)$ Each department contains at least $2$ PCs$.$

c$)$ Each department$$s devices are connected to their designated switch

then to a gateway router.

d$)$ Each router is connected to a centralized server and connected to

other routers as well.

e$)$ All devices are connected via ethernet physical cables.

$2.$ After completing the topology, run the following scenarios:

a$)$ Assign a static IP address and Domain Name for the server. While

giving all other PCs dynamic IP addresses.

b$)$ Make sure all devices are connected and reachable by sending ping

requests.

c$)$ Create a text file at the server and make any PC request it and

download a copy of it from the server.

d$)$ Use any PC to upload a text file to the server and then use another

PC to download that file.

e$)$ Assign email addresses to each PC and send emails back and forth

between $2$ different PCs in different buildings through the

centralized server.

f$)$ Send files directly from one PC to another PC in the same building

using a P$2$P model without using the server.

g$)$ Re$-$adjust the costs of links to force your routers to forward packets

through different routes.

Part $2$:

$1.$ Open the following sample PCAP file in Wireshark. In the light of the

packet analysis, please answer the following questions:

a$)$ Looking at the communication flow between devices

$(66\mathrm{.}218\mathrm{.}65\mathrm{.}120$ &$192\mathrm{.}168\mathrm{.}0\mathrm{.}104),$ can you tell which device is the

client and which one is the server?

b$)$ Assuming processing delay is negligible, when did the client

receive the first segment? How long is the RTT for the first

segment of data?

c$)$ What is the size of the data payload for the second segment of data

sent from server to client?

d$)$ How many other devices are sending requests to the server in that

simulation?

Deliverables:

Each team must submit only $1$ copy of a PDF file containing the answers to the

previous parts in the following formats:

$$ Part $1\mathrm{.}1$: submit a diagram of your finished topology, make sure all IP

addresses for each device are labeled in the diagram as well as links

information.

$$ Attach screenshots of the CLI of each router indicating the IP addresses

and interface links states.

$$ Attach screenshots with the ping information between $2$ random devices

located in different buildings.

$$ Attach a screenshot of the CLI commands you used to send the files

to$/$from the server alongside their results.

$$ Attach screenshots of the sent and received emails in the inbox of each of

the PCs you selected.

$$ Part $1\mathrm{.}2.$g: Attach a screenshot from the simulation window of packets

before and after adjusting the costs and highlight the difference in the

routes used.

$$ For part $2,$ answer the questions and provide the filter you used to find

this information. Write down a justification for each answer you deduce.