CP5631 Assignment – Networking Case study Assignment

Introduction CP5631

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This case study
has been divided into five components.

You are to design
a network, research and source appropriate devices justifying choices
(feasibility, efficiency, etc.), subnet the network, assign IP addresses to the
appropriate devices, design ACLs to satisfy security requirements, and write a
report introduction for the project.

Note: This is not a group project. Each student must individually complete all parts of their submission. 

Students must start with a new
document and they must not have another person’s file in their
possession at any time. Students may discuss the task with each other, but each
student must write their assignment independently and not show their work to
other students.

Deliverables

1. A single Word document (.docx) – containing all parts

Assignment breakdown

Scenario

Ausdata
Services Inc., an Australian data analytics company, has asked you to assess
and redesign their network. They are opening a new branch in Mackay, which will
require new equipment. They have existing contracts and hardware to maintain
fibre-optic leased line WAN links between sites.

PART 1 – Introduction

PART 2 – Network diagram

PART 3 – Subnet the network and assign IP
addresses to the appropriate devices

PART 4 – Research and source appropriate
devices justifying choices (feasibility, efficiency, etc.) with a Weighted
Scoring Model (WSM)

PART 5 – Security by applying Access
Control Lists (ACLs) to filter traffic

PART 1 – Introduction

The first part of your report should be introduction to the project. Although
this is the first part you should include in your report, it should be the last
part that you write. In your introduction you are to provide an outline for
each of parts 2, 3, and 4.

What to include:

• Describe the overall task of
  assessing and redesigning the network.
• Explain why it is important to
  produce a well-designed network diagram.
• Explain why it is necessary to
  create and document the separate subnets for the network.
• Explain why new equipment is
  needed for the new branches, the basic role of the switches and routers, and
  the process you used to select the equipment.

The introduction should be well-articulated: clear, concise, and use
correct spelling and grammar. The intended audience for the introduction can be
assumed to have basic technical knowledge but are not networking experts. The
introduction should be no longer than a page.

PART 2 – Network specifications
and diagram

Network Specifications

You have been given a rough sketch of the
network topology below. You are to draw the network using Visio, subnet the
network (see part 3), and assign port
numbers and IP addresses to ports.

Network Structure

Hardware

• Only include one switch in you diagram for each LAN
  or WLAN (even if more are required)
• Servers should be on their own LAN
• The Internet router port address is 31.255.14.98/30
• The Gosford router is connected to the Internet and
  provides access to the public backbone containing a web server
  and a compute server.

PART 3 – Subnet the network using VLSM, and assign
IP addresses to the appropriate devices.

Each location has the following number of hosts

Gosford,
Canberra, Cairns, and Mackay each include a wireless LAN for clients to use.

Location	Workstations	WLAN addresses
Gosford	750	150
Canberra	600	38
Cairns	250	19
Mackay	90	19
Darwin	60
Adelaide	50

Subnetting

Use VLSM to subnet the network topology
using a public class B network. You are to use the table format below to
provide the subnet details.

Table 1. Subnets
(including WAN subnets)

Spreadsheet Columns:  Subnet name, subnet address, subnet mask (in
slash format), first useable address, last useable address, broadcast address,
static address range and DHCP address range (all addresses to be in dotted
decimal notation)

Table 2. Router Interfaces

Spreadsheet Columns:  Location, interface, IP address, subnet mask
(in slash format)

Table 3. Servers

Spreadsheet Columns:  Location, server name, IP address, subnet
mask (in slash format)

Additional
requirements:

• Choose one private B class network address (/19) for the entire network and subnet this block of addresses to optimise spare addresses for future expansion.
• Place the WAN subnets in the blocks directly following the LAN address space.
• Add 100% to each subnet to allow for growth in the number of hosts specified for each LAN (i.e. workstations × 2). Do not allow for any growth in the number of servers or size of WLANs
• DHCP will to be used for IP address allocation for hosts in each subnet and these ranges are to be allocated for each LAN.
• Static IP addresses are to be allocated where appropriate.
• The ISP has given us an IP address of 31.255.14.98/30 for our Internet connection at Gosford.

PART 4 – Research and source appropriate devices
justifying choices (feasibility, efficiency, etc.)

You are
to research and submit a project procurement plan for the Mackay network. The
devices you must include are routers, switches, and wireless access points. Make
sure the devices you select can handle the number of workstations required and
provide a good quality of service to wired and wireless users.

Your project
plan and final recommendations should be based on a Weighted Decision Matrix (like
the WDM you did in the Procurement Practical). You are to compare five (5)
devices from each category and to base the decision on reasonable and
well-justified attributes.

The
budget for procurement is $5,500. You may exceed this if you can justify it
well.

Your project plan is to contain the
following components:

Weighted
Decision Matrix – hardware resource requirements analysis

• Include
  a written justification for priorities and attributes given in the matrix
• Create
  your WDMs in Excel and copy and paste them into your Word doc

Budget

• Create a
  well-presented table of the prices of all devices and the total cost
• Include
  hardware only, not labour

PART 5 – Access Control Lists

Write
ACL tables, in the format taught in the workshops, to address the following
security requirements.

Requirements for all ACLs

• A CLs are to be placed in the optimal position
  to minimise bandwidth unless the location of the ACL is specified
• Do not rely on the implicit deny
  any any
• No ACL is required on a port
  where all traffic is permitted
• Create one ACL table per router

a)
Access to the Internet
and public backbone

Apply these ACL/s to serial 0/0 on the Gosford
router.

1.      External hosts outside the organisation (on the Internet) must only
be able to access the Gosford Web server on the public backbone using HTTPS.

2.      No other external access is permitted into the organisation from the
Internet.

3.      Internal hosts must only be able to communicate out to the Internet
using HTTP and HTTPS (Hint: established connections must be allowed to
communicate back into the private network).

b) Gosford and Canberra

4.     
The Gosford and Canberra LANs
should have unrestricted access to the Internet, and to the Gosford servers.

5.     
The Gosford and Canberra WLANs
should have HTTP and HTTPS access to the Internet, and to the Gosford Web
server, but no access to anywhere else on the corporate network.

6.     
The Gosford Web server should
have unrestricted communication via HTTP and HTTPS and be able to respond to
ping requests from internal hosts.

7.     
No traffic from outside the
corporate network should be able to reach the Gosford Computer server.

c) The other sites

8.     
The other LANs should have HTTP
and HTTPS access to the Internet and to the Gosford Web server. The exception
is the Mackay LAN, which should have unrestricted Internet access.

9.     
The Gosford and Canberra WLANs
should have HTTP and HTTPS access to the Internet, and to the Gosford Web
server, but no access to anywhere else on the corporate network.

10.  The Adelaide Backup servers should be able to initiate connections via
FTP, SFTP anywhere within the corporate network without restriction.

11.  Only traffic from established connections and from the Adelaide LAN
is permitted to reach the Adelaide Backup servers. All other access should be
blocked.

 Marking Scheme CP5631

Ensure
that you follow the processes and guidelines taught in class to produce high
quality work. This assessment rubric provides you with the characteristics of
exemplary, good, satisfactory, and unacceptable work in relation to task
criteria

Criteria	Exemplary (90-100)%	Good (70-80)%	Satisfactory (50-60)%	Limited (20-40)%	Very Limited (0-10)%
Part 1 Introduction Content   /15	Accurate outline of report contents that demonstrates excellent understanding of networking content.   Suitable for a semi-technical audience.	Accurate outline of report contents that demonstrates good understanding of networking content.   Generally suitable for a semi-technical audience.	Generally accurate outline of report contents that demonstrates understanding of networking content.	Provides basic outline of report contents.	Incomprehensible, negligible attempt, or not done.
Quality of Writing /5		Most of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Over half of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Under half of the criteria are satisfactory (See criteria under “exemplary”) or significant issues in some areas.	Many significant errors with structure, grammar, or spelling, or not done.
Part 2 Topology Design Diagram appearance   /10		Most of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Over half of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Under half of the criteria are satisfactory (See criteria under “exemplary”) or significant issues in some areas.	Many problems (e.g. not done in Visio, inconsistent formatting, diagram does not align to subnetting scheme, etc).
Diagram Labels and Devices   /10	Topology is accurate and the diagram	Most of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Over half of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Under half of the criteria are satisfactory (See criteria under “exemplary”) or significant issues in some areas.	Many problems (e.g. topology is inaccurate; devices are not named, etc).
Part 3 Subnetting Scheme /10		Most of the criteria are satisfactory (See criteria under “exemplary”) but one or two minor issues, such as a missing LAN, or incorrect address block choice.	Most of the criteria are satisfactory (See criteria under “exemplary”) but several minor issues (e.g multiple missing LANs or WANs) or a significant issue such as incorrect size.	Some LANs and WANs are documented.   Sizes are correct, or at least not outlandishly incorrect.	Few LANs and WANs are correctly identified.   Nonsensical subnet size chosen.
Subnet Tables /10	Based on the chosen subnetting scheme, the following specifications are available and correct for LANs and WLANs table, and WANs table:	Most of the criteria are satisfactory (See criteria under “exemplary”) but some minor lapses.	Most of the criteria are satisfactory (See criteria under “exemplary”) but several minor issues, or a significant issue such as missing a column.	Tables are presented and contain most of the correct columns, and some correct entries.	Tables contain major issues such as impossible subnet bounds, or negligible attempt, or not done.
Router Table /10	Based on the chosen subnetting scheme, the following specifications are available and correct in the router interface table:	Most of the criteria are satisfactory (See criteria under “exemplary”) but a few minor issues or missing interfaces.	Over half of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Table is presented, but contains several significant errors such as mismatched IP addresses or missing columns.	Table is generally incomplete or incorrect.
Server Table /5	Based on the chosen subnetting scheme, the following specifications are available and correct in the server table:	Most of the criteria are satisfactory (See criteria under “exemplary”) but a few minor issues.	Over half of the criteria are satisfactory (See criteria under “exemplary”) but some minor issues.	Table is presented, but contains several significant errors such as mismatched IP addresses or missing columns.	Table is generally incomplete or incorrect.
Part 4 – Procurement Weighted Decision Matrices /30		As per “exemplary”, but some minor lapses.	As per “exemplary”, but several minor lapses, or some significant issues, such missing WDMs, formatting issues, some poor justifications, or some inappropriate hardware choices.	Some WDMs are available, but justifications are generally poor, and hardware choices generally inappropriate.	Major issues with WDMs, justifications, and hardware choices.
Budget   /10	Professional, detailed, accurate, and visually appealing.	As per “exemplary”, but some minor lapses.	Generally accurate and visually appealing.	Several inaccuracies.	Generally inaccurate.
Part 5 – ACLs   /40	ACLs are well presented in tables.   Almost all (10 or 11) requirements are perfectly satisfied.	ACLs are well presented in tables, possibly with minor lapses.   Most of the requirements (7 to 9) are perfectly satisfied, or almost all are satisfied with minor lapses.	ACLs are presented in tables.   Most of the requirements (6 or more) are satisfied, but there a several issues.	ACLs are poorly presented.   Most of the requirements are not correctly satisfied.	Negligible attempt or not done.
Overall Document Document and Submission   /5	Submission is a single Word document divided into sections as outlined.		Single Word document, but not correctly divided into sections.		Incorrect submission.
Formatting   /15	Consistent and readable use of fonts.   All tables are consistently neat and easy to read.	Consistent and readable use of fonts.   Tables are generally neat and readable.	Mostly consistent and readable use of fonts.   Tables are somewhat neat and readable.	Inconsistent use of fonts, or inappropriate choice.   Some tables are messy or difficult to read.	Poor use of fonts.   Several tables are missing or very poorly formatted.

Sample Solution CP5631 Internet Fundamentals

PART 2 – Subnet the
network using VLSM, and assign IP addresses to the appropriate devices.

Table 1. Subnets
(including WAN subnets) 104.200.16.26/30

Subnet name	Subnet address	Subnet mask	First usable address	Last useable address	Broadcast address range	Static address range	DHCP address range
Sydney_LAN	104.200.16.27	/27	104.200.16.29	104.200.16.254	104.200.16.255	104.200.16.1	104.200.17.1 – 104.200.16.254
Brisbane_LAN	104.200.24.0	/28	104.200.17.1	104.200.17.254	104.200.17.255	104.200.17.1	104.200.17.1 – 104.200.17.254
Adelaide_LAN	104.200.28.0	/29	104.200.28.1	104.200.28.254	104.200.28.255	104.200.28.1	104.200.17.1 – 104.200.28.254
Melbourne_LAN	104.200.32.0	/30	104.200.32.1	104.200.32.254	104.200.32.255	104.200.32.1	104.200.17.1 – 104.200.32.254
Canberra_LAN	104.200.34.0	/31	104.200.34.1	104.200.34.254	104.200.34.255	104.200.34.1	104.200.17.1 – 104.200.34.254
Hobart_LAN	104.200.36.0	/32	104.200.36.1	104.200.36.254	104.200.36.255	104.200.36.1	104.200.17.1 – 104.200.36.254
Brisbane_WLAN	104.200.38.0	/28	104.200.38.1	104.200.38.254	104.200.38.255	104.200.38.1	104.200.17.1 – 104.200.38.254
Sydney_WLAN	104.200.42.0	/27	104.200.42.1	104.200.42.254	104.200.42.255	104.200.42.1	104.200.17.1 – 104.200.42.254
Adelaide_WLAN	104.200.44.0	/29	104.200.44.1	104.200.44.254	104.200.44.255	104.200.44.1	104.200.17.1 – 104.200.44.254

Table 2. Router
Interfaces

Location	Interface	IP address	Subnet mask
Sydney	S0/0	104.200.44.178	/30
Fa 0/0	104.200.44.167	/28
Brisbane	S0/0	104.200.44.179	/30
Fa 0/0	104.200.44.168	/28
Canberra	S0/0	104.200.44.180	/30
Fa 0/0	104.200.44.169	/28
Adelaide	S0/0	104.200.44.182	/30
Fa 0/0	104.200.44.164	/28
Melbourne	S0/0	104.200.44.183	/30
Fa 0/0	104.200.44.163	/28
Hobart	S0/0	104.200.44.184	/30
Fa 0/0	104.200.44.161	/28

Table 3. Servers

Location	Server name	IP address	Subnet mask
Sydney	Web	104.200.46.10	/29
Database	104.200.46.11	/29
Hobart	Backup1	104.200.46.12	/29
Backup2	104.200.46.13	/29
Backup3	104.200.46.14	/29

PART 3 –
Research and source appropriate devices justifying choices

Executive summary

• The devices in the network plan include 6
  routers one in each location, 6 switches one in each location, 3 WLAN access
  point in Sydney Melbourne and Brisbane. However the number of switches for
  every LAN depends on the port number of the switch and PC numbers of each LAN,
  2 servers (web and DB servers) at Sydney and 3 back up servers at Hobart.
• Among these devices, the most important device
  is the servers, the web server will handle client requests while the database
  server will store all the information. Periodic backup servers will ensure
  continuous operation in case of any unprecedented event.
• Another key point is that data analysis needs a
  relatively good computer, especially in the CPU, and Memory
• At least, the cost should be as low as possible.

Each
location has the following number of hosts

Sydney,
Melbourne, and Brisbane each include a wireless LAN for clients to use.

Location	Workstations	WLAN addresses
Sydney	910	14
Melbourne	200	6
Brisbane	40	6
Canberra	120
Adelaide	70
Hobart	20

Weighted Decision
Matrix – hardware resource requirements analysis.

The following
weights of every requirement are all the same for every device.

0	The requirement does not apply to this scenario
1	The requirement is not very important
2	The requirement is partially met, but not completely
3	The requirement must be met
4	The requirement has been met
5	The requirement is critical

1. Router

Requirement

Requirement	Description	Weight
Cost	Price is less than 400	1
Speed	The transfer speed should be less than 1000m	5
Port number	One has at least 4 ports	3
Firewall	Security is important	3

Details

Model	No of ports	Speed (Mbps)	Cost $	firewall
Cisco RV042-AU	4	10/100	239	NO
Cisco RV042G-K9-AU	4	1000	285	Yes
Cisco RV324	16	1000	455	Yes
Linksys LRT 214-AU	6	1000	185	Yes
Net Gear FVS336G	2	1000	285	Yes

Weight score

Requirement	No of ports	Speed (Mbps)	Cost &	firewall	Total weight score
Description	>=4	>=1000	<400	Yes
weight	3	5	1	3
Cisco RV042-AU	4	0	4	0	16
Cisco RV042G-K9-AU	4	4	4	4	48
Cisco RV324	6	4	0	4	50
Linksys LRT 214-AU	6	4	6	4	56
Net Gear FVS336G	0	4	4	4	36

• Switch

Requirement

Requirement	Description	Weight
Cost	<4000 for all	3
Speed	1000m	3
Port number	>=16	5
Manageable	Yes	1

Details

Model	No of ports	Speed (Mbps)	Cost &	Management	Need Number	All cost $
Cisco SF 100D-16	16	10/100	79	NO	30	2370
Cisco SF 100-24	24	10/100	109	Yes	21	2289
Cisco SF 200E-24P	24	10/100	489	Yes	21	10269
D-link DGS-1100-24	24	10/100/1000	189	Yes	21	3969
HP J9981A 1820-48G	48	10/100/1000	669	Yes	11	7359

Weight score

Requirement	No of ports	Speed (Mbps)	Cost &	Management		Total weight score
Description	>=16	>=100	<4000	Yes
weight	5	3	3	1
Cisco SF 100D-16	4	4	6	0		50
Cisco SF 100-24	4	4	4	4		50
Cisco SF 200E-24P	4	4	0	4		36
D-link DGS-1100-24	4	6	4	4		54
HP J9981A 1820-48G	6	6	2	4		52

• Wireless access
  points

Requirement

Requirement	Description	Weight
Cost	<4000 for all	3
Speed	2.5	3
Port number	>=16	5
Manageable	Yes	1

Details

Model	No of ports	Speed (Ghs)	Cost $	Management	Need Number	All cost $
TP Link Archer	6	1.34	179	Yes	13	2327
Asus RT-AC530	4	1.3	271	Yes	13	3523
Cisco Aironet 3000	6	2.34	300	Yes	13	3900
Linksys Business Wireless-N600	8	2.5	115	Yes	13	1495
TP-LINK TL-WA901ND	6	1.0	54	Yes	13	1950

Weight score

Requirement	No of ports	Speed (Ghs)	Cost $	Management		Total weight score
Description	>=8	<=3	<4000	Yes
weight	5	3	3	1
TP Link Archer	4	3	6	4		50
Asus RT-AC530	2	4	4	4		50
Cisco Aironet 3000	4	4	0	4		36
Linksys Business Wireless-N600	6	6	4	4		54
TP-LINK TL-WA901ND	4	2	2	4		52

Budget

Item	Cost
Cisco Aironet 3000	3900
Cisco SF 200E-24P	10269
Cisco RV324	910
Total	15079

• Security by
  applying access control lists to filter traffic

Access to
the Internet and public backbone:

	External hosts outside the organization must only be able to access the web server on the public using HTTP and HTTPs
	No other external access is permitted into the organization from the internet
	Internal host must only be able to communicate out to the internet using HTTP and HTTPS
	Access-list 100 permit tcp any host 104.200.46.10eq 80
	Access-list permit tcp any host 104.200.46.10eq 443
	Access-list 100 permit tcp any established
	Access-list 101 permit tcp any eq 80
	Access-list 101 permit tcp any eq 443
	Host name: Sydney router

Brisbane,
Adelaide, and Canberra

	This LANs are to have unrestricted access to the Sydney server
	This LANs are to have unrestricted access to each other except that all three LANs are to be restricted from initiating ping requests
	Each of them are not allowed to access anywhere else on the network
	ACL
	Access-list 100 permit IP any host 104.200.46.10
	Access-list 100 permit IP any host 104.200.46.10
	access-list 100 permit TCP host 104.20.0.2 host 104.200.38.138 eq 1433 (Assume that the ip address of Seattle server is 150.10.0.2)

Hobart

	Access-list 100 permit ip host 104.200.46.10
	access-list 100 permit icmp any 104.200.45.1 0.0.15.255 echo-reply
	access-list 100 permit icmp any 104.200.45.1 0.0.15.255 echo-reply
	access-list 100 permit tcp any host 104.200.45.139 eq 22
	access-list 100 permit tcp any host 104.200.45.139 eq 22
	access-list 100 deny ip 104.200.45 any

 

PART 5 – Cloud computing proposal

Replacing
ALL workstations within the organisation with thin clients, which will access a
desktop environment provided by a cloud service provider (such as Amazon)

Item	Description	Quantity	Cost per Year
workstations	Maintenance	1360	$ 1,088,000
Workstations	Electricity	1360	272,000 KwH

Replacing
ALL workstations within the organization with thin clients, which will access a
desktop environment provided by a private cloud infrastructure, created
in-house and based in Sydney.

Item	Description	Quantity	Cost per Year
workstations	Maintenance	1360	$ 1,088,000
Workstations	Electricity	1360	272,000 KwH

Introduction

Typically, cloud technology
frameworks are designed with redundant components and locations to assure a
single failure does not interrupt service. The multi-tenant design of cloud
computing services brings economy of mechanism and ultimately a lower total
cost of ownership to provider and customer. Clearly, cloud computing has opened
many doors for organizations to grow revenue, reach new markets, improve
productivity, and expand product offering. These same doorways open to a large
untrusted network when cloud services are connected to the Internet. “The chief
concern firms have with the cloud is the overall security of their data.

Business Considerations

According to Skyhigh Networks, “The
cloud has created a new wave of enterprise software that is not only faster to
develop, easier to deploy, and more cost effective, but also offers innovative
features not found elsewhere. That’s because much of the innovation today is
happening in software delivered via the cloud, and for many customers, the
cloud is mainstream” An interesting finding was that companies are selecting
cloud based solutions because their evaluation has identified the cloud application
as the best-in-class enterprise application not just best-in-class cloud-based
application.

Cost

Lower power costs. Cloud computing uses less electricity. That’s an inevitable result of
the economies of scale. Better hardware utilization means more efficient power
use.

Lower people costs. Whenever I analyze organizations’ computing costs, the staffing budget
is usually the biggest single line item; it often makes up more than half of
the total. Good IT people are expensive; their salaries, benefits, and other
employment costs usually outweigh the costs of hardware and software. And
that’s even before you add in the cost of recruiting good staff with the right
experience.

Security

Despite the potential gains achieved
from the cloud computing, the organizations are slow in accepting it due to
security issues and challenges associated with it. Security is one of the major
issues which hamper the growth of cloud. The idea of handing over important
data to another company is worrisome, such that the consumers need to be
vigilant in understanding the risks of data breaches in this new environment.
The company will adopt standard security measures to maintain integrity
security of data.

Conclusion

Prospect and existing customers of
service providers are demanding confidentiality, integrity, and availability
when contracting with vendors for cloud computing. Contracts and service level
obligations that commit to only availability objectives are not adequate to
manage business risk. Service Level Agreements provide a vehicle of
communication between the vendor and customer regarding performance and quality
expectations. It is best for the company to adopt cloud computing as explained
above.

References

Millard, Christopher (2013). Cloud Computing Law. Oxford University
Press. ISBN 978-0-19-967168-7.

Singh, Jatinder; Powles, Julia; Pasquier, Thomas; Bacon, Jean (July
2015). “Data Flow Management and Compliance in Cloud Computing”. IEEE
Cloud Computing. 2 (4): 24–32. doi:10.1109/MCC.2015.69.

Armbrust, Michael; Stoica, Ion; Zaharia, Matei; Fox, Armando; Griffith,
Rean; Joseph, Anthony D.; Katz, Randy; Konwinski, Andy; Lee, Gunho; Patterson,
David; Rabkin, Ariel (1 April 2010). “A view of cloud computing”.
Communications of the ACM. 53 (4): 50. doi:10.1145/1721654.1721672.

Hu, Tung-Hui (2015). A Prehistory of the Cloud. MIT Press. ISBN
978-0-262-02951-3.

Mell, P. (2011, September 31). The NIST Definition of Cloud Computing.
Retrieved November 1, 2015, from National Institute of Standards and Technology
website: http://csrc.nist.gov/publications/nistpubs/800-145/SP800-145.pdf

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