CP5631 SP1 2018 Networking Case Study: Network Design and Subnetting

This case study focuses on redesigning a network for a data analytics company, incorporating new branches and maintaining existing infrastructure. The design emphasizes efficiency and feasibility, with a key adaptation being cloud computing to enhance cost-effectiveness and security. The solution includes an executive summary, a network diagram, and a subnetting scheme with IP address assignments for various locations (Sydney, Melbourne, Brisbane, Canberra, Adelaide, and Hobart) across LAN and WLAN networks. Device selection is justified using a weighted scoring model (WSM) for routers, switches, and wireless access points, considering factors like security, speed, features, and cost. The recommended devices include Cisco RV220W Wireless Router, Cisco SG200-26 Gigabit Switch, and Netgear WAC720 Access Point. A cloud computing proposal addresses information security, data recovery, administration capabilities, and compliance restrictions, recommending a private cloud infrastructure located in Sydney to provide desktop environments to workstations, aiming to reduce costs while maintaining security.

CP5631 SP1 2018 ASSESSMENT 2
Networking Case Study
Task 1: Executive Summary
The main aim of the project is to design a network which would be directly
justifying the aspect which is related to the concept of efficiency and feasibility.
The main point of highlight in the concept of the design is directly related to
the aspect of the concept which is related to feasibility and efficiency. The
main adaptation which would be made with the implementation of the design
is the concept of cloud computing which would be directly enhancing the
sector of cost and security. The recommendation of the design is based on the
factors of weighted design matrix. The concept of the weighted design matrix
is very much similar to the concept of the WDM which can be implemented in
the process of procurement process. The devices which would be selected for
the design would be involving the features of cost and service related features.

The work station in the organization would be accessing the environment of the
desktop which are directly provided by a cloud service provider. The access
would be done by means of a private cloud infrastructure which is created in
house and which is located in the Sydney. The current contact of the
organization is $850 per workstation with the requirement in the field of
services and hardware. The factor of cost can be considered as one of the most
important factors in the design concept which would be also involving the
different security measures involved within their implementation.
Task 2: Network Diagram

Task 3: Sub-netting - Subnet the network and assign IP addresses to the
appropriate devices.
(Subnetting-LAN & WAN)
LAN IP
addresses
needed
Subnet
size
Subnet number Subnet Mask Host Address
range
Sydney LAN 400 /23
172.16.0.0
255.255.254.0 172.16.0.1 to
172.16.1.254

Melbourne
LAN
70 /25
172.17.0.0
255.255.255.128 172.17.0.1 to
172.17.0.126
Brisbane LAN 150 /24
172.18.0.0
255.255.255.0 172.18.0.1 to
172.18.0.254
Canberra LAN 50 /26
172.19.0.0
255.255.255.192 172.19.0.1 to
172.19.0.62
Adelaide LAN 80 /25
172.20.0.0
255.255.255.128 172.20.0.1 to
172.20.0.126
Hobart LAN 15 /27
172.21.0.0
255.255.255.224 172.21.0.1 to
172.21.0.30
Sydney WLAN 30 /27
172.22.0.0
255.255.255.224 172.22.0.1 to
172.22.0.30
Melbourne
WLAN
14 /28
172.23.0.0
255.255.255.240 172.23.0.1 to
172.23.0.14
Brisbane
WLAN
14 /28 172.24.0.0 255.255.255.240 172.24.0.1 to
172.24.0.14
Router Interfaces (Sydney)
Location Interface IP Address Subnet Mask
Sydney Wan interface port 104.200.16.26 255.255.255.252
Sydney Serial 0/0/0 172.16.0.1 255.255.254.0
Sydney Serial 0/0/1 172.16.0.2 255.255.254.0
Sydney Serial 0/2/0 172.16.0.3 255.255.254.0
Sydney Fast Ethernet 0/0 172.16.0.4 255.255.254.0

Sydney Fast Ethernet 0/1 172.16.0.5 255.255.254.0
Sydney Fast Ethernet 0/2 172.16.0.6 255.255.254.0
Sydney Fast Ethernet 0/3 172.22.0.1 255.255.255.224
Router Interfaces (Melbourne)
Location Interface IP Address Subnet Mask
Melbourne Serial 0/0/0 172.16.0.4 255.255.254.0
Melbourne Serial 0/0/1 172.17.0.1 255.255.255.128
Melbourne Serial 0/2/0 172.17.0.3 255.255.255.128
Melbourne Serial 0/2/1 172.19.0.1 255.255.255.192
Melbourne Fast Ethernet 0/0 172.17.0.6 255.255.255.128
Melbourne Fast Ethernet 0/1 172.23.0.1 255.255.255.240
Router Interfaces (Hobart)
Location Interface IP Address Subnet Mask
Hobart Serial 0/0/0 172.17.0.4 255.255.255.128
Hobart Fast Ethernet 0/0 172.21.0.2 255.255.255.224
Hobart Fast Ethernet 0/1 172.21.0.3 255.255.255.224
Hobart Fast Ethernet 0/2 172.21.0.4 255.255.255.224
Hobart Fast Ethernet 0/3 172.21.0.5 255.255.255.224
Hobart Fast Ethernet 0/4 172.21.0.6 255.255.255.224

Router Interfaces (Adelaide)
Location Interface IP Address Subnet Mask
Adelaide Serial 0/0/0 172.17.0.2 255.255.255.128
Adelaide Fast Ethernet 0/0 172.20.0.2 255.255.255.128
Router Interfaces (Canberra)
Location Interface IP Address Subnet Mask
Canberra Serial 0/0/0 172.16.0.2 255.255.254.0
Canberra Serial 0/0/1 172.19.0.1 255.255.255.192
Canberra Fast Ethernet 0/0 172.19.0.2 255.255.255.192
Router Interfaces (Brisbane)
Location Interface IP Address Subnet Mask
Brisbane Serial 0/0/0 172.18.0.1 255.255.255.0
Brisbane Fast Ethernet 0/0 172.18.0.2 255.255.255.0
Brisbane Fast Ethernet 0/1 172.24.0.1 255.255.255.240
Server details
Location Server name IP Address Subnet Mask

Sydney Web Server 172.16.0.16 255.255.254.0
Sydney DB Server 172.16.0.17 255.255.254.0
Hobart Backup Server 172.21.0.21 255.255.255.224
Hobart Backup Server 172.21.0.21 255.255.255.224
Hobart Backup Server 172.21.0.22 255.255.255.224
Task 4: Research and source appropriate devices justifying choices
(feasibility, efficiency, etc.) with a Weighted Scoring Model (WSM)
Routers comparison:
Router model Security
features
supported
Speed in
Mbps
NO of USB
ports
Access Points
support
(Yes/No)
Cost
Cisco RV220W
Wireless
PPTP
VPN,SSL,
2024 Mbps 2 Yes $363

Network
Security Router
Site to Site
VPN, IPsec
Cisco 2811
Integrated
Services Router
SSL, Site to
Site VPN,
IPsec
2024 Mbps 3 Yes $532
ASUS RT-
ACRH13 Dual-
Band Gigabit
Router
SSL, IPsec
VPN
1267 Mbps 1 No $125
Cisco 881 router SSL, Site to
Site VPN,
IPsec
1024 Mbps 2 Yes $653
Cisco 1941
router
SSL, Site to
Site VPN,
IPsec
600 Mbps 2 Yes $850
Weighted Matrix (Out of 5)
Description Security
features
Speed in
Mbps
(>=1000
Mbps)
USB ports Access Points Cost
Cisco
RV220W
Wireless
5 4 2 1 $363

Network
Security
Router
Cisco 2811
Integrated
Services
Router
4 4 3 1 $532
ASUS RT-
ACRH13
Dual-Band
Gigabit
Router
3 4 1 1 $125
Cisco 881
router
4 3 2 1 $653
Cisco 1941
router
4 2 2 1 $850
Based on the above Weighted Decision Matrix, Cisco RV220W Wireless Security Router/Firewall
has the highest 11 points which best suits the client need in terms of budget and performance..
Ethernet Switches comparison:
Switch
name
Total no of
ports
Speed Managed/
Unmanaged
Switch
Layer
details
Cost
D-Link 24 1000 Mbps Unmanaged Layer-2 $88

DGS-1024C
Ethernet
switch
TP-LINK
TL-SG1024
24-port
switch
24 1000 Mbps Unmanaged Layer-2 $92
Cisco
SG200-26
Gigabit
Ethernet
switch
26 1000 Mbps Managed Layer-3 $304
D-Link 16-
Port Gigabit
switch
(DGS1016A
)
16 1000 Mbps Unmanaged Layer-2 $75
Netgear
ProSafe
GS724T
switch
24 1000 Mbps Smart managed Layer-2/
Layer-3
$290
Weighted Matrix (Out of 5)
Switch
name
Ports count Speed
(>=1000
Mbps)
Managed/Unmanaged Switch
Layer
details
Cost

D-Link
DGS-1024C
Ethernet
switch
4 5 0 0 $88
TP-LINK
TL-SG1024
24-port
switch
4 5 0 0 $92
Cisco
SG200-26
Gigabit
Ethernet
switch
5 5 1 1 $304
D-Link 16-
Port Gigabit
switch
(DGS1016A
)
3 5 0 0 $75
Netgear
ProSafe
GS724T
switch
4 5 2 2 $310

Based on the above Weighted Decision Matrix, Cisco SG200-26 Gigabit Switch has 12
points & Netgear ProSafe GS724T Switch has 13 points, but when comparing budget and brand
name Cisco SG200-26 Gigabit Switch best suits the client’s need..
Wireless Access Points comparison:
Model name VPN support
(Yes / No)
WAP/WPA2
support
Speed
>=1000 Mbps
USB ports Cost
Netgear
WAC720
Yes Yes 867 Mbps 1 $340
Netgear
Wireless
Access Point
WAC104-
100NAS
Yes Yes 1200 Mbps 0 $124
TP-Link
AC1200
(EAP225)
Yes Yes 867 Mbps 0 $103
Linksys N300
Dual Band
router
No Yes 300 Mbps 0 $85
D-Link DIR-
825 AC 1200
Wi-Fi Router
No Yes 1167 Mbps 1 $41