Comprehensive IT Infrastructure Report for iTech: Design and Analysis

This report details an IT infrastructure solution for iTech, a company requiring a network design for its five-story building with 300 computers per floor. The report explores two design proposals: a dedicated server design and a cloud-based design. The dedicated server design includes a three-layer hierarchical model, detailed component requirements, and a logical design with load balancing. The cloud-based design explores various cloud service providers and their offerings. The report also covers network simulation using Cisco Packet Tracer, including DHCP and DNS configuration. The geographical scope, scalability, and IP address allocation are also discussed. The report aims to provide a secure, efficient, and scalable network solution, addressing iTech's current and future needs. The report analyzes the advantages and disadvantages of each approach and provides recommendations for the optimal IT infrastructure for iTech, including network design, DNS, DHCP configuration, and load balancing.

Running head: SBM4104 IT INFRASTRUCTURE
SBM4104 IT Infrastructure
Name of the Student
Name of the University
Author’s Note

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Table of Contents
1. Introduction......................................................................................................................3
1.1. Aims an objectives....................................................................................................3
1.2. Contents covered in the report..................................................................................3
1.3. Organizational Description.......................................................................................4
2. IT infrastructure component required..............................................................................4
3. Three layer hierarchical Model........................................................................................5
3.1 Introduction................................................................................................................5
3.2. Current and future iTech IT infrastructure requirement...........................................5
3.3. Geographical scope of a network.............................................................................6
3.4. Possibility of scaling of iTech network....................................................................6
4. Dedicated server design proposal....................................................................................6
4.1. Service and servers required.....................................................................................7
4.2. Proposed logical design............................................................................................7
4.3. IP address and network mask for the network..........................................................9
5. Cloud based design proposal.........................................................................................10
5.1. Cloud service organizations....................................................................................10
5.2. Service list provided by the organization...............................................................11
6. Simulation of the network.............................................................................................12
6.1. Access layer diagram..............................................................................................12

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6.2. DHCP Configuration..............................................................................................13
6.3. Configuration of DNS and Web Server..................................................................14
6.4. Demonstration of dynamic allocation of the network configuration......................14
7. Conclusions and recommendations...............................................................................15
Bibliography......................................................................................................................16

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1. Introduction
1.1. Aims an objectives
The main aim of the report are as follows:
 The new network solution is required to provide advantage to the organization
and accommodate the future growth of the organization
 The network is required to be secured from unauthorized access and firewall is
required to be installed for securing the network
 The provide file sharing and automatically assign the IP address to the device
connected in the network.
The objectives of the report are as follows:
 To configure the server with DNS and DHCP
 To configure the webserver with a domain name
 To configure the network of the data center building for providing web and email
service to the users
 To increase the efficiency of the current network design and accommodate the
future growth of iTech
 To block the unauthroised user from accessing the resources of the network.
1.2. Contents covered in the report
The logical network design for iTech is created after analyzing the geographical scope
and the future needs of the network. The users and the applications are segmented and IP and
subnet mask for each of the building is calculated for the development of the logical design.

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Cisco packet tracer is used for the configuration of the server placed at the data center with DNS
and DHCP. For the preparation of the design of the cloud hosting a survey is made on the cloud
service provider and the cloud solution is chosen according to the requirement of iTech.
1.3. Organizational Description
A network solution for iTech and the network is required to be designed for its five story
building with 300 computers for each of the building. A similar type of LAN is required to be
designed for each if the building and a planning is required to be made for the design of the data
center and replace the current infrastructure. Two types off design are proposed or the network
such as the dedicated server design and the cloud hosting design. The logical design of the data
center building is developed based on the hierarchical model and the servers used and thee type
of network connection used are discussed in the report.
2. IT infrastructure component required
The main component required for the development of the IT infrastructure of the
organization are the power cooling, storage subsystem, switch, router, physical cable, firewall,
etc. The data center of the organization is required to have proper cooling and is required to be
secured from physical access of the unauthroised personnel. The building is required to be
secured for implementation of a dedicated server and store the data in the in house server of the
organization. For the implementation of the cloud computing solution in the organization the no
important It infrastructure is required and it reduces the maintenance cost of the framework of
the organization. The organization needs to analyze the IaaS model for analyzing the flexibility
of the cloud computing solution and implement the service and the storage option according to
the workload of the organization. The SaaS model can also be adopted by the organization for

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involving a third party solution provider to host the workloads of the organization and reduce the
maintenance cost involved for maintenance of the local database.
3. Three layer hierarchical Model
3.1 Introduction
The network required to be prepared for itech is divided into three different layers for the
identification of the working of the network and develop the network according to the
requirement of the organization. The layers are the Core layer, Distribution layer and the Access
layer. The core layer of the network consists of the protocols and the routers which are utilized
for the translation of the network address and establishment of the connection between the
different nodes connected in the network. The host accessing the network can be denied for using
the network resources and the nodes connected in the network. The distribution layer acts as the
border for communicating with the different devices connected inside or outside the network. It
lies between the access and the core layer and can be utilized for the management of the
congestion or the traffic in the network. The Access layer is used for transferring the data packets
in the network and permitting or blocking the user from accessing the network resources. The
delivery of the data packets to the destination host is dependent on the access layer.
3.2. Current and future iTech IT infrastructure requirement
The current requirement of the organization is to develop an in house database system for
the management of the web and the email service in the organization. The files residing in the
database of the organization are required to be shared in the network and it is required to be
secured from external agents. The router used in the network is required to be configured with
DHCP for automatically assigning the IP address to the nodes connected with the router. A

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server is required to be configured in the network with a domain name and a connection is
required to be created with the server for meeting the needs of the organization. 900 nodes are
required to be connected in the network and 300 computers are required to be connected with
different subnets for each of the floors in the building.
3.3. Geographical scope of a network
The network is required to cover the two building and the three floors are required to
accommodate 300 computers. A proper cabling plan is required to be used for reducing
congestion in the network and improve the traffic management. The web server is required to be
configured with DNS and DHCP server is required to be configured for allocating IP address to
the hosts connected in the network.
3.4. Possibility of scaling of iTech network
It is expected that there would be an increase in the number of nodes in the network and
thus the subnet mask for each of the floor is required to be calculated such that it can
accommodate the future growth of the organization. The proposed solution is required to meet
the requirement of the organization for the coming five years and thus the recent technology is
required to be applied for creation of the network solution for itech.
4. Dedicated server design proposal
The data center of the organization is required to be created with load balancing and
flexible for the management of the future needs. Currently the framework of the organization
contains two servers one is used for hosting the website of the organization and the other is used
for hosting the database. The problem of the current system is that if any of the server gets
overloaded the access of the website is lost by the users.

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4.1. Service and servers required
The organization needs to access the website and the resources of the organization from
any of the level and from remote location. A load balancer and database balancer is required to
be installed in the network for switching the load such that the front end are balanced. The web
and the database server should respond to the user during the peak time and the performance
should not be down.
4.2. Proposed logical design
The architecture proposed for itech is that a front end load balancer is required to be
applied in the network for meeting the performance shrinkage of the network and the flexibility
to move between the servers are increased. The load balancer are configured such that a DNS
can use any of the load balancer and the load balancer in turn picks the server with the lowest
load for processing the request. The web server generates database traffic and it is sent to the
database balancer and the database server with lowest load is selected for forwarding the request.
The working of the architecture is demonstrated in the following figure.

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Figure 1: Proposed Architecture
(Source: created by author)
If any of the load balancer fails the request is transferred to the other load balancer and all
the request are sent through that load balancer. If one of the webserver becomes overloaded or
stops responding it would be detected by the load balancer and the rest of the request are sent to
the other web server. The database balancer is used for the redirecting the request generated from
the web server and if any of the database balancer stops responding the balancer placed at the
front end would send the request to the other. The servers are required to have high end
configuration such that it can be virtualized for meeting the growing demands.

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4.3. IP address and network mask for the network
Major Network: 172.29.64.0/21
Available IP addresses in major network: 2046
Number of IP addresses needed: 900
Available IP addresses in allocated subnets: 1530
About 75% of available major network address space is used
About 59% of subnetted network address space is used
Subne
t
Name
Neede
d Size
Allocate
d Size
Address Mas
k
Dec Mask Assignable
Range
Broadcast
A 300 510 172.29.64.
0
/23 255.255.254.
0
172.29.64.1
-
172.29.65.25
4
172.29.65.25
5
B 300 510 172.29.66.
0
/23 255.255.254.
0
172.29.66.1
-
172.29.67.25
4
172.29.67.25
5
C 300 510 172.29.68.
0
/23 255.255.254.
0
172.29.68.1
-
172.29.69.25
172.29.69.25
5

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4
5. Cloud based design proposal
The cloud based design can be applied as a solution of the current problem of the
organization and it would reduce the need of up gradation of the in house hardware platforms for
accommodation of the future growth of the organization. The implementation of the cloud
solution would also reduce the monthly expenses involved with the management of the servers
and reduce the man power needed for the management of the server. The risk associated with the
in house server such as accidental damage, fires, power failures and misuse by the employees
can also be avoided with the implementation of the cloud solution.
5.1. Cloud service organizations
There are different cloud service organizations offering the cloud service for the
organization and the organization is required to be selected according to the features and pricing
offered by the cloud vendors and the requirement of the organization. The flexibility offered by
the vendor is required to be noted before choosing the vendor because it is difficult to migrate
from the cloud platform once the data being uploaded to the cloud servers. A highly reliable
cloud service is possible but the cost of maintaining is much higher than normal cloud service, so
both this things should be mentioned to the customer. The customer may choose highly reliable
cloud service on extra payment but the service should be made available to them. There are
many cloud service provider such as google, Amazon, VMWare, etc. Amon them Amazon and
Google are chosen for implementing in the current framework of the organization for increasing
the efficiency of the organization.

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5.2. Service list provided by the organization
Amazon web service is best suited for iTech because it provides the best in class service
to its customers and it meets all the requirement of the organization. The list of service offered
by AWS are as follows:
 Compute- it can be used for increasing the computation power of the network and
serve more number of client at a time
 Storage- it can be used for expansion of the storage space and manage the files of
the organization at a low cost
 Database- It can be used for the management of the querry and the manage the
memory cache system
 Migration- It can be used for migration of the on premise application to the cloud
and increase the efficiency of the network
 Network and content Delivery- It improves the efficiency of the organizational
network and reduce the congestion in the network. The traffic management can be
improved with the implementation of the network.
 Developer Tools- It can be used for the development of application and building
and testing of the codes developed by the developer in a software company. The
application can be debugged using the service.
 Management tools- It can be used for monitoring the resources and application
and manage the network resources used for the development of the cloud solution.
 Security, identity and Compliance- It is used for increasing the security of the
cloud server by adding encryption and access management.