Assessment 3
Designing and implementing a network
CSE2NFX Network engineering fundamentals
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Objectives
▪ Examine the given scenario and create a performance analysis document.
▪ Apply appropriate network physical standards for different network scenarios.
▪ Determine and plan the appropriate classless IP addressing scheme for the given
scenario.
▪ Assign proper subnets / VLSM subnets.
▪ Configure the networking devices.
Copying and plagiarism
This is an individual assignment. Students are not permitted to work in a group when writing this
assignment. Plagiarism is the submission of another person’s work in a manner that gives the
impression that the work is their own. La Trobe University treats plagiarism seriously. When detected,
penalties are strictly imposed.
Further information can be found on http:
www.latrobe.edu.au/students/academic-
integrity/explanation/plagiarism
Submission guidelines
Your assignment submission should be typed, not written/drawn by hand.
Submit the electronic copy of your assignment through the subject LMS.
Submission after the deadline will incur a penalty of 5% of the available assignment mark per day
capped at 5 days. No assignment will be accepted after 5 days. If you have encountered difficulties
that lead to late submission or no submission, you should apply for special consideration.
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Part A: Design the proposed network topology
Scenario
Digital Graphics Design (DGD) is a medium-size graphic design company located in Melbourne. It
offers a wide range of graphic design services to different companies/clients to popularise their
ands and help them with their publicity by creating state-of-the-art pieces such as flyers, logo,
multimedia presentations, magazine titles, visiting cards, websites, profiles, and adding graphics to
existing marketing material as per the client’s requirements.
The office consists of two levels. As a part of their expansion the managing director of DGD has
ecently hired two more levels within the same building.
Table 1 shows the total number of staff and devices by location and Figure 1 illustrates the cu
ent
network setup.
Level Staff/devices Number
Level 1 Administrative staff 30
IT support staff 4
Database server 1
Printers 2
Level 2 Graphic designers 40
Marketing staff 22
Printers 2
Level 3 Website developers 35
Managers 10
Printers 2
Level 4 Project coordinators 15
Accounting staff 5
Programmers 30
Printers 2
Total 200
Table 1
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Figure 1
Note
• Figure 1 does not show all staff devices and printers.
All staff computers, database server and printers are connected to D-Link DES-1026G 24-port
10/100 (Mbps) unmanaged switches via Cat3 cable. Also, a Linksys gateway device is connected
to the network for internet access. All staff save their work-related data over the local area network
to a centralised database server (located on level 1).
However, after the inception of two more levels, the network performance has dropped. Staff are
complaining about the slow transfer of data to the database server; also when sharing their work-
elated data over the local area network to other computers.
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You have been appointed to redesign an appropriate local area network for DGD. The design should
ideally be such that all the staff from one level can communicate with all other staff within the office
with good speeds. The managing director of DGD also expects users to experience fast download
speeds when
owsing the internet. To avoid a slow and sluggish network, the managing director of
DGD has asked you to propose a LAN design to fulfil the above requirements.
Note
• This design needs only one router and the managing director has already purchased a
Cisco router, model number 2811. So when attempting Task 1 (below), you are NOT
equired to suggest the router model.
• Your focus should be on improving the LAN performance.
You need to perform the following task.
Task 1: Produce a performance analysis document
Based on the above information, you are required to produce a performance analysis document,
including the following.
a) Examine the existing local area network topology (as shown in Figure 1) and perform an
analysis on why the cu
ent network performance is slow.
) Your recommendations for improving LAN performance.
Note
In your recommendations, you need to focus on topology, LAN devices, cables, etc.
c) Recommended network components as part of improving the LAN performance. Provide a
list of network components, network component specifications, quantity, location and
compliance IEEE standards of the selected networking components.
You can use Table 2, shown below, as a template to list the components of your topology. The
first two rows are examples. Starting from the third row, you will have to provide an answer for the
Cisco 2811 router and your chosen network components.
Component Specification
(Number of ports,
speed, connector type)
Quantity Location Compliant
standards
Hub (example) 16 ports, RJ45
connector
How many
hubs?
Level number IEEE 802.3af
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Cable (example) UTP N/A Everywhere Cat3
Cisco 2811 router
(Given to you by
DGD)
2 built-in Gigabit
Ethernet ports
More expansion slots
are available to add
more Ethernet ports.
1 unit Level 1
esearch and
provide the
standards for
this device
Table 2
Note
Add all the written answers in a Word file named xxx_cse2nfx_assessment3.docx
(where xxx is your student number). Mention the task number in the Word file.
Part B: Implement IP routing in a simulated
environment
Scenario
Digital Marketing (DM) is an enterprise marketing firm. As a part of their expansion, DM is planning
to open two new
anches in Sydney and Canbe
a. The managing director of DM has decided to
use IPv4 class B network address XXXXXXXXXX/16 for both new offices.
Before moving to the actual design and implementation phase, the managing director provided you
with a simulated design of the proposed network (as shown in Figure 2), which will assist you in
understanding the entire network topology.
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Figure 2
Note
• Figure 2 does not show all end devices and LAN switches.
• You need to use Cisco Packet Tracer software to configure the routers. Therefore, for
simulation purposes, consider that all the routers are Cisco 2811 series.
• Only the devices shown in Figure 2 are to be used throughout this assessment.
• Add all the screenshots and written answers in a Word file named
xxx_cse2nfx_assessment3.docx (where xxx is your student number). Mention the task
number in the Word file.
Table 3 shows the number of host addresses (including WAN link) for both
anches’ LAN.
Branch
Network Number of hosts
Sydney
LAN1 440
LAN2 390
LAN3 280
WAN1 (Sydney to Canbe
a) 1
Canbe
a
LAN4 530
LAN5 340
LAN6 485
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WAN1 (Canbe
a to Sydney) 1
Table 3
You have been hired as a network engineer to effectively design the IP addressing scheme for each
LAN and WAN link by minimum address wastage. Each LAN has a different number of host
equirements, so, in this scenario, the FLSM method is not a good idea. You need to apply the VLSM
method and perform the following task.
Task 1: Design the IP addressing scheme
This is a critical planning step. To support your planning, two table templates (Table 4 and Table 5)
are given below.
a) Fill Table 4 with the planned IP addressing scheme (in dotted decimal notation) for each
LAN by using the VLSM method.
LAN1
Customised subnet mask (VLSM subnet mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
LAN2
Customised subnet mask (VLSM subnet mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
LAN3
Customised subnet mask (VLSM subnet mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
LAN4
Customised subnet mask (VLSM subnet mask)
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Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
LAN5
Customised subnet mask (VLSM subnet mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
LAN6
Customised subnet mask (VLSM subnet mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
Table 4
) Fill Table 5 with the planned IP addressing scheme (in dotted decimal notation) for the
WAN link by using the VLSM method.
WAN link (Sydney to Canbe
a)
New VLSM subnet mask (customised subnet
mask)
Address prefix length (i.e., XXXXXXXXXX./?)
VLSM subnetted network address
First usable IP address
Last usable IP address
Table 5
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Task 2: Build the topology
After designing the IP addressing scheme, you need to create the network diagram shown in Figure
2 using a Cisco Packet Tracer. Use suitable cable types when cabling the devices (for example,
Ethernet or serial). Label the devices as depicted in Figure 2.
a) Save the Cisco Packet Tracer file as xxx_cse2nfx_assessment3.pkt (where xxx is your
student number).
) Include a screenshot of your topology as evidence of the completion of this task.
Note
No configuration is required in Task 2; only a network diagram with relevant devices and