Network Design: OZ Dispatch Logical Network Design - COIT20264

This report presents a logical network design for OZ Dispatch, a home delivery service, focusing on their headquarters in Parramatta, NSW, and 20 remote distribution points. The design addresses business goals like market expansion, increased revenue, and reduced operational costs, while considering constraints such as finance and government regulations. Technical goals include network availability, scalability, security, performance, and adaptability. The design incorporates VPN for secure WAN connectivity, OSPF and BGP routing protocols, and security mechanisms like ACLs and VLANs. The report also includes a physical network diagram, a table of networking devices, and a test plan to validate the new network's functionality. Desklib offers this and many other solved assignments for students.

COIT20264, HT1-2019
Network Design
Assessment 1- Logical Network Design
OZ Dispatch

OZ Dispatch
Logical Network Design
Executive Summary
OZ Dispatch is a small business enterprise that specializes in the home delivery service. The
organization’s headquarters are is located in Parramatta NSW, of Australia. In the Parramatta office,
data analyst, accountant, managing director, marketing and sales executive are in this office. Data
analyst is doing a lot of data analysis. Due to this, there is need for a lot of data sharing within the office.
OZ Dispatch customer base consists of individuals who are located in different remote areas. The
customers should be able to place orders at the comfort of their zones. This will be through the web.
Furthermore, they should be able to make payments using the web interface. This will require WAN
system that is secured due to the sensitive transactions that are to be done.
Note that once customers have made their orders, these orders are collected form the suppliers and
taken to the distribution points near to the customers. OZ Dispatch has a total of 20 distribution points
with two employees. Once the products are collected, there is a need for these products to be uploaded
in the ERP system for the purpose of tracking. The twenty remote offices will require to have access to
this ERP system hosted at the head office. VPN will be the best solution for this dilemma.
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Table of Contents
Executive Summary.....................................................................................................................................1
List of Tables................................................................................................................................................3
List of Figures...............................................................................................................................................3
Project Goal.................................................................................................................................................4
Project Scope...............................................................................................................................................4
List of Business Goals and Constraints.........................................................................................................4
Business Goals ........................................................................................................................................4
Expansion in market share...................................................................................................................4
Increased profit and revenue collection..............................................................................................5
Reduced operational costs..................................................................................................................5
Exploration of new markets.................................................................................................................5
Increased employee productivity........................................................................................................5
Provision of superior customer support..............................................................................................5
Business Constraints:...............................................................................................................................5
Finance................................................................................................................................................5
Staffing and management...................................................................................................................6
Government Regulations.....................................................................................................................6
List of Technical Goals and Trade-offs.........................................................................................................6
Availability...............................................................................................................................................6
Scalability.................................................................................................................................................6
Security....................................................................................................................................................6
Performance............................................................................................................................................7
Adaptability.............................................................................................................................................7
Table of User Communities, Data Stores, Network Applications and Traffic Flows.....................................8
User Community Table............................................................................................................................8
Network Application................................................................................................................................9
MODEL FOR ADDRESSING AND NAMING..................................................................................................11
The explanation and justification of your logical network design..............................................................14
LOGICAL NETWORK DIAGRAM(S) INCLUDING ADDRESSING AND NAMING..............................................15
The list of routing and switching protocols, and security mechanisms.....................................................17
OSPF PROTOCOL....................................................................................................................................17
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Logical Network Design
BGP PROTOCOL.....................................................................................................................................17
HSRP PROTOCOL....................................................................................................................................17
SWITCHING PROTOCOL.........................................................................................................................17
STP.........................................................................................................................................................18
VTP........................................................................................................................................................18
8. DISCUSSION OF SECURITY MECHANISMS..................................................................................18
VPN tunnelling end-points.....................................................................................................................19
Access Control Lists...............................................................................................................................19
VLANs....................................................................................................................................................19
WPA.......................................................................................................................................................19
The physical network diagram...................................................................................................................20
The table of networking & communication devices and applications required.........................................20
The explanation and justification of 12 above...........................................................................................22
A test plan that can be used to test the new network...............................................................................22
One detailed test script for your test plan.................................................................................................22
References.................................................................................................................................................24
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OZ Dispatch
Logical Network Design
Project Goal
The project goal is to allow for a secured and scalable network which allows real-time data transfer
between the head office and the remote twenty offices. During the design of network for OZ Dispatch,
there are considerations which we take into account. Some of the considerations include accessibility
and integrity of data over the public network. Scalability is also another factor that we consider. This
factor measure the ability of a network to grow without interfering with business operations. Along
these factors, it is required that the printers, scanners, are to be shared on the network.
Project Scope
The network to be designed is to serve OZ dispatch head office and twenty of its branches. The network
design process covers the following areas
i. List of Business Goals and Constraints
ii. List of Technical Goals and Trade-offs
iii. Table of User Communities, Data Stores, Network Applications and Traffic Flows
iv. Model for addressing and naming
v. Explanation and justification of the logical network design
vi. Logical network diagram(s) including addressing and naming
vii. Discussion of routing and switching protocols
viii. Discussion of security mechanisms
List of Business Goals and Constraints
IT any business organization that would want to satisfy its internal and external customers, it
must integrate IT Infrastructure services. These services include but are not limited to email,
internet access, contentment management system, system applications such as the ERP, print, file
storage, and sharing, systems security, etc. OZ Dispatch Company would want to improve on its
service delivery to its customers by the integration of IT infrastructure services in its business
processes. This article seeks to outline top-down approach activities necessary to Implement IT
services in OZ Dispatch. In the top-down technique, users of the system are engaged so much
before infrastructure services are the rolling wheel of every business enterprise. Of late, statics
show that ground breaking. This is aimed at getting exactly what the client is in need
(Oppenheimer, 2014). The project is intended to take a maximum of 4 weeks with a minimum of
three weeks. The implementation process is set to begin on the 10th of June 2019.
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OZ Dispatch
Logical Network Design
Business Goals
Note that business enterprises that are in existence have a list of goals that they are to achieve
them to consider their business viable. Below is a list of business goals for OZ Dispatch
Company;
Expansion in market share
Extended market share can only be achieved by going out there in the market and convincing
customers or potential buyers on how you can satisfy their needs. This can be done in a number
of ways. For OZ Dispatch Company, we choose the deployment of Information technology in
convincing our customers. Will be using emails, website, and use of flyers.
Increased profit and revenue collection
Collection of revenue in terms of sales of huge volumes of products or is a goal every profit-
making business enterprise. OZ Dispatch Company aims to rise in the area of revenue collection
and profits.
Reduced operational costs
Operational costs if not managed appropriately, they can bring down the business enterprise.
History has it that there are business organizations which have closed down due to
mismanagement of operational costs. While on other hand business enterprises who are capable
to manage their operational costs, they have long-term survival.
Exploration of new markets.
One may feel that markets outside there they are flooded, this is not true because there are
markets which are still very raw, and they have not been exploited. Deployment of IT
infrastructure may speed-up the process.
Increased employee productivity
Once OZ employees have been furnished with relevant technology, their out level will increase
significantly. This is the target for OZ Dispatch Company.
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Logical Network Design
Provision of superior customer support
Customers who are served beyond their expectations will leave OZ Dispatch premises smiling
and it is obvious that they will come again, or they may refer someone. This is what our client
company expects.
Business Constraints:
A business constraint refers to the limitations which interfere with the profitability of a business
enterprise endeavour. To improve the profitability of the business, it is required that this
limitation be reduced or be removed completely. Like any other business organization, OZ
Dispatch has the following business constraints.
Finance
Financial factors are often interfering for business processes. These constraints can range from
excessive salaries to inadequate budget allocation or overhead expenditures. A good example is
when more employees are required but the allocated budget provided cannot allow, this will limit
the growth.
Staffing and management
Since businesses change and grow, their management and staffing needs change too. This factor
can constraint business productivity and growth especially when employees are not able to
conform to the new business requirements.
Government Regulations
Sometimes, business enterprise’ regulations constrain profitability. More so, government-
imposed laws can be a business constraint. For example, laws concerning imports and exports
can directly affect business operations.
Having identified the above constraints that would affect OZ Dispatch business operations
negatively, OZ management should find a way of dealing with these constraints that can be
managed. For them that are beyond OZ, then an alternative has been used.
List of Technical Goals and Trade-offs
A technical goal refers to an objective milestone that will get a business project closer to its
achievement. Some of the technical goals for OZ Company IT infrastructure project are:
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Logical Network Design
Availability
Availability is the measure of the run time of a system without failures. OZ network is expected
to be uptime at a percentage of 99.97% so as to eliminate standstills due to unavailability of the
network system.
Scalability
Scalability measures how well a system can allow expansion and growth without disrupting
business processes. OZ network to be designed will be scalable allowing future growth.
Security
It is important to have a secure networking system because there are intruders who would want
to access our networking system due to reasons known to them. We cannot claim that we will
develop a totally secure network system. However, our network will be developed in a manner
that will slow down the activities of an intruder.
Performance
Network performance measures the service quality of a network as observed by a client. Our
costs and upgrade.
Adaptability
A network that is adaptable is one that can be introduced to a business enterprise and it does not
constraint business operations. The network being developed will fit into OZ business activities
without holding any of the operations.
The trade-off is a technique of balancing between two desirable opposing qualities, factors or
situations with an aim of obtaining another desirable outcome. According to Mariño, it is
desirable to trade-off one factor against another as long as the outcome will be of better results
(Mariño, 2016). It, therefore, implies that finance, space and project delivery will be a trade-off
to performance, availability, and scalability. Furthermore, implementation of one a high
throughput for one critical application program interprets the sacrifice of another application.
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Logical Network Design
Table of User Communities, Data Stores, Network Applications and Traffic Flows
User Community Table
A user community of a network refers to the users of a computing system together with the
applications that they use. Table of user communities for OZ Dispatch is as below
Table of user communities
User community name Number of users Location of the
community
Applications used
Head office 5 Parramatta All
Remote offices 40 (20 offices each with
2 users)
Remote locations All
Customers Variable Remote location Web and mobile
payment application
Suppliers Variable Remote location ERP
Network applications, data store and Traffic flows
Application
name
Type of Traffic
Flow
Technological Protocol(s)
used
Approximate
Bandwidth
needed (Kb)
Database
update
Server/Server CDN 100000
E-mail Client/Server SMTP 10
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Logical Network Design
Remote
access
Terminal/host RDP 600
Web
browsing
Client/Server HTTP,HTTPS 60
File transfers Peer/Peer FTP 100
IP telephony Client/Server RTP,SCCP,SGCP,MGCP,SIP 10000
Network Application
Applicat
ion
Name
Traffic flow Type Protocol
s used
by
Applicat
ion
Bandwidt
h
Requirem
ents by
Applicatio
ns
Data
Store
User
Communi
ties
QoS
FTP
(File
Transfe
r
Protocol
)
Data (Client/Server) FTP,
SFTP
2 Mbps File
Server
Employee
s –
managing
director,
sales and
marketing
executive,
data
analyst
and an
accountan
t
Reserved
traffic
rate.
Email Data (Client/Server,
Server/Client)
SMTP,
POP3,
IMAP
1024kbps Email
Server
and
Web
mail
Storage
Employee
s –
managing
director,
sales and
marketing
executive,
data
Reserved
Traffic
Rate
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Logical Network Design
analyst
and an
accountan
t
VOIP Audio (Peer to Peer) SIP,
SRTP
128 kbps Cisco
Router
Configu
red with
VOIP
Server
Employee
s –
managing
director,
sales and
marketing
executive,
data
analyst
and an
accountan
t, CDC
employees
Transmis
sion
delay<11
0 ms,
Web
Services
Data
(Client/Server,Server
/Client)
HTTP,
HTTPS
1024 kbps Backup
on
storage,
Web
Server
Employee
s –
managing
director,
sales and
marketing
executive,
data
analyst
and an
accountan
t, CDC
employees
,
customers
Reserved
Traffic
Rate
Remote
Termina
l Access
Data (Terminal/Host) SSH,
Telnet,
VPN
256 Kbps Applicat
ion
Server
Systems
Administr
ator
Isolated
traffic
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OZ Dispatch
Logical Network Design
Table of data store
Data Stores Location Applications
File Server Head office FTP (File
Transfer
Protocol)
Mail Server Head office Email
Server Head office VOIP
Web server Head office Web Services
MODEL FOR ADDRESSING AND NAMING
Network component naming refers to the giving of a name to a networking device. Naming
should be done in a way that makes it easier to identify a networking component. Computer
networking components should be given a name following the below naming scheme
Location name, component generic name, let’s say we want to name a router at Parramatta
office, it will be, Parramatta Router.
Addressing refers to the allocation of an IP address to a networking device. This can be done
manually or by use of a DHCP server. Static/manual IP address suits best for small business
enterprises of a population less than 10 people. This technique will be the best for the CDCs
sites. For Parramatta office where the population may be higher and frequent visits, we will
recommend the use of DHCP. This will relieve the systems administrator the struggle of
mastering IP addresses assigned computing devices and those to be assigned (Velte & Velte,
2013).
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