IT Infrastructure: Network Design and Cloud Computing

IT Infrastructure
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Table of Contents
Introduction.................................................................................................................................................3
Geographical Scope.....................................................................................................................................4
Logical Design..............................................................................................................................................8
IP Addressing and Subnet Mask..................................................................................................................9
Cloud Computing Providers.......................................................................................................................10
Techniques supporting Virtualization and Cloud computing.....................................................................11
Dynamic Cloud Scaling...............................................................................................................................12
Summary and Conclusion..........................................................................................................................12
References.................................................................................................................................................13

Introduction
Network interconnectivity and usage has increasingly become one of the main integral part of
any functional organization in transacting their business activities. This therefore means that
organizations ought to have proper network models in place in order to support and keep their
businesses running.
This report focus will therefore be to analyse the current networking layout of Jambo Poa
Company and provide a proposal of how their new network should be in their new location at
Sydney City Centre. The report will look at the geographical scope of the network, provide
logical design and IP addressing scheme that the organization should use, cloud computing
service providers and how virtualization support dynamic scaling of the organization network in
cloud computing.
Case Study
Jambo Poa Limited is a printing company that is located at Sydney and whose business activities
relies mostly on the network. The company has 1200 workstations located across the entire
organization. In addition to the workstations the company has its data centre located within the
organization premise. Recently the company is planning to open a new branch at Sydney City
Centre in a building of 8 floors with each floor consisting of 30 rooms each having five
workstations. The company network currently consist of file, print, DHCP and DNS servers and
all these should now be configured to communicate with the new branch.
Current Network
This company’s current network is based on the flat networking model and not the three-layered
networking model.
Figure 1: Flat Network Design
This therefore means that all the networking devices operates within the same level. This has
been a challenge to the organization since it is difficult to extend their network and also adding
more devices to this network degrades the performance of the organizations network. The
security of this network is also not good due to poor design of the network. This therefore has

called for the redesign of the network model in order to improve the performance and security of
the networking system in place.
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Scope
The new network design of the proposed network will consist of layered many-to-many
relations. The network will be developed based on the three-hierarchical networking model.
Figure 2: Three-hierarchical Design
In this network design, each networking device will be located within the three layers depending
on their functionalities (Academy, 2014). The proposed layered network will also ensure that the
each LAN within the new building is well monitored and in case of any technical problem it will
be easy to troubleshoot without affecting the rest of the network as it is the case now. In order to
understand the geographical scope of the proposed network, the following hierarchical layers for
the new network are explained below.
Access Layer
This is the interfacing layer that connects the end user devices which consist of the IP phones,
PC’s, tablets, printers among others to the organizations network. The main functions of this
layer include;
 Managing of access control policy
 Creation of different and separate collision domains
 Connection of the workstations to the network via distribution layer.